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1. Characterization, identification and virulence of Metarhizium species from Cuba to control the sweet potato weevil, Cylas formicarius Fabricius (Coleoptera: Brentidae)

Author:
Yamilé Baró; Christina Schuster; Yohana Gato; María Elena Márquez; Andreas Leclerque
Source:
Journal of applied microbiology 2022 v.132 no.5 pp. 3705-3716
ISSN:
1364-5072
Subject:
Cylas formicarius elegantulus; Lepidoptera; Metarhizium anisopliae; Metarhizium robertsii; biological control; conidia; economic feasibility; fungi; genes; integrated pest management; virulence; Cuba
Abstract:
... AIMS: Entomopathogenic Metarhizium fungi are widely recognized for their biological control potential. In Cuba, several fungus‐based bio‐insecticides have been developed and are produced as part of integrated pest management (IPM) programmes for economically relevant agricultural pests. Screening of fungal isolates from the INISAV strain collection was used for the development of bio‐insecticides ...
DOI:
10.1111/jam.15460

2. Identification of miRNAs in Response to Sweet Potato Weevil (Cylas formicarius) Infection by sRNA Sequencing

Author:
Jian Lei; Yuqin Mei; Xiaojie Jin; Yi Liu; Lianjun Wang; Shasha Chai; Xianliang Cheng; Xinsun Yang
Source:
Genes 2022 v.13 no.6 pp. -
ISSN:
2073-4425
Subject:
Cylas formicarius elegantulus; adults; cultivars; industry; insect resistance; microRNA; pests; sweet potatoes; transcriptome; China
Abstract:
... The sweet potato weevil (Cylas formicarius) is an important pest in the growing and storage of sweet potatoes. It is a common pest in the sweet potato production areas of southern China, causing serious harm to the development of the sweet potato industry. For the existing cultivars in China and abroad, there is no sweet potato variety with complete resistance to the sweet potato weevil. Thus, und ...
DOI:
10.3390/genes13060981

3. Impact of Host Plant Resistance on Emergence, Body Parameters, and Supercooling Point of Cylas formicarius elegantulus (Coleoptera: Brentidae)

Author:
Nupur Sarkar; Mark J. Murray; Michael J. Stout; Jeffrey A. Davis
Source:
Florida entomologist 2022 v.105 no.1 pp. 65-70
ISSN:
1938-5102
Subject:
Cylas formicarius elegantulus; antixenosis; body length; cold; cultivars; entomologists; females; host plants; insects; males; oviposition; storage pests; summer; sweet potatoes; terpenoids; Florida
Abstract:
... Sweetpotato weevil, Cylas formicarius elegantulus (Summers) (Coleoptera: Brentidae), an in-field and storage pest of sweetpotato, is the primary insect constraint to sweetpotato production in tropical and subtropical regions. Feeding by adult and larval sweetpotato weevil induces terpenes, rendering storage roots unmarketable. To reduce storage root damage and sweetpotato weevil populations, the p ...
DOI:
10.1653/024.105.0110

4. Effects of hydroxycinnamic acid esters on sweetpotato weevil feeding and oviposition and interactions with Bacillus thuringiensis proteins

Author:
Milton O. Anyanga; Dudley I. Farman; Gorrettie N. Ssemakula; Robert O. M. Mwanga; Philip C. Stevenson
Source:
Journal of pest science 2021 v.94 no.3 pp. 783-794
ISSN:
1612-4758
Subject:
Bacillus thuringiensis; Curculionidae; Cylas formicarius elegantulus; antifeedants; cortex; coumaric acids; genetic transformation; host plants; larvae; mortality; oviposition; pest control; pests; sweet potatoes; toxicity
Abstract:
... Sweetpotato weevil (SPW) pest management is challenging because the pest target is sub-terranean, so the application of pesticides is impractical and usually ineffective. Host plant resistance and the genetic transformation of sweetpotatoes to produce entomotoxic Bt proteins offer potential for environmentally benign pest control. Resistance can be conferred by naturally occurring hydroxycinnamic ...
DOI:
10.1007/s10340-020-01297-5

5. Functional characteristic analysis of three odorant‐binding proteins from the sweet potato weevil (Cylas formicarius) in the perception of sex pheromones and host plant volatiles

Author:
Jinfeng Hua; Chao Pan; Yongmei Huang; Yanqing Li; Huifeng Li; Cuirong Wu; Tianyuan Chen; Daifu Ma; Zongyun Li
Source:
Pest management science 2021 v.77 no.1 pp. 300-312
ISSN:
1526-498X
Subject:
Cylas formicarius elegantulus; RNA interference; adults; females; fluorescence; gene expression; host plants; ligands; lymph; males; olfactory receptors; pest management; pests; phylogeny; reverse transcriptase polymerase chain reaction; sex pheromones; sweet potatoes
Abstract:
... BACKGROUND: The sweet potato weevil, Cylas formicarius, is the most serious pest of sweet potato worldwide. The molecular mechanism of sex pheromone recognition in C. formicarius has not been reported. Odorant‐binding proteins (OBPs) play a critical role in selectively binding and transporting pheromones or other odors to the surface of olfactory receptor neurons through the aqueous sensillar lymp ...
DOI:
10.1002/ps.6019

6. Genetic variation of two weevil pests of sweet potato, Cylas formicarius (Coleoptera: Brentidae) and Euscepes postfasciatus (Coleoptera: Curculionidae), in Japan based on mitochondrial DNA

Author:
Hiraku Yoshitake; Makoto Arimoto; Norihide Hinomoto; Chi-Feng Lee; Sheng-Shan Lu; Sheryl A. Yap; Analyn A. Cabras
Source:
Applied entomology and zoology 2021 v.56 no.4 pp. 483-496
ISSN:
0003-6862
Subject:
Cylas formicarius elegantulus; DNA barcoding; Euscepes postfasciatus; Japan; entomology; genes; genetic variation; haplotypes; mitochondrial DNA; phylogeny; statistical analysis; sweet potatoes; Fiji; Samoa; Tonga
Abstract:
... We examined the genetic variation in the sequences of cytochrome c oxidase subunit I gene (DNA barcode region) and some other regions of mitochondrial DNA of sweet potato weevil, Cylas formicarius (Fabricius, 1798) (Coleoptera: Brentidae), and West Indian sweet potato weevil, Euscepes postfasciatus (Fairmaire, 1849) (Coleoptera: Curculionidae), in Japan. In the DNA barcode region of C. formicarius ...
DOI:
10.1007/s13355-021-00755-5

7. Laboratory and Greenhouse Evaluation of Melia volkensii Extracts for Potency against African Sweet Potato Weevil, Cylas puncticollis, and Fall Armyworm, Spodoptera frugiperda

Author:
Victor Jaoko; Clauvis Nji Tizi Taning; Simon Backx; Pierfrancesco Motti; Jackson Mulatya; Jan Vandenabeele; Titus Magomere; Florence Olubayo; Sven Mangelinckx; Stefaan P. O. Werbrouck; Guy Smagghe
Source:
Agronomy 2021 v.11 no.10 pp. -
ISSN:
2073-4395
Subject:
Cylas formicarius elegantulus; Melia; Spodoptera frugiperda; agronomy; antifeeding activity; bark; corn; greenhouse experimentation; greenhouses; insect control; leaves; pulp; sweet potatoes
Abstract:
... The African sweet potato weevil, Cylas puncticollis, and fall armyworm, Spodoptera frugiperda, are insect pests of economic importance that have a negative impact on sweet potato and maize production, respectively. In this study, we aimed to evaluate the potential of Melia volkensii extracts to protect sweet potato and maize plants against damage by both insect pests. We evaluated extracts from th ...
DOI:
10.3390/agronomy11101994

8. Male body size does not affect the refractory period of females in the West Indian sweet potato weevil Euscepes postfasciatus (Fairmaire) (Coleoptera: Curculionidae) and the seed bug Togo hemipterus (Scott) (Heteroptera: Lygaeidae)

Author:
Chihiro Himuro; Atsushi Honma; Yusuke Ikegawa; Tsuyoshi Ohishi; Takahisa Miyatake
Source:
Journal of ethology 2021 v.39 no.1 pp. 39-46
ISSN:
0289-0771
Subject:
Cylas formicarius elegantulus; Euscepes postfasciatus; Lygaeidae; Togo hemipterus; animal behavior; body size; females; males; risk; risk reduction; sexual selection; sperm competition; variance
Abstract:
... Multiple mating by females increases both the risk and intensity of sperm competition for males. The ability to temporarily or permanently inhibit female receptivity to further mating represents a highly adaptive strategy to reduce the risk of sperm competition. Males of the West Indian sweet potato weevil Euscepes postfasciatus (Fairmaire) (Coleoptera: Curculionidae) and the seed bug Togo hemipte ...
DOI:
10.1007/s10164-020-00669-9

9. The Fungus Metarhizium sp. BCC 4849 Is an Effective and Safe Mycoinsecticide for the Management of Spider Mites and Other Insect Pests

Author:
Rudsamee Wasuwan; Natnapha Phosrithong; Boonhiang Promdonkoy; Duangjai Sangsrakru; Chutima Sonthirod; Sithichoke Tangphatsornruang; Somsak Likhitrattanapisal; Supawadee Ingsriswang; Chettida Srisuksam; Kewarin Klamchao; Malinee Suksangpanomrung; Thipmanee Hleepongpanich; Sareeya Reungpatthanaphong; Morakot Tanticharoen; Alongkorn Amnuaykanjanasin
Source:
Insects 2021 v.13 no.1 pp. -
ISSN:
2075-4450
Subject:
Aphis craccivora; Aphis fabae; Bactrocera dorsalis; Cylas formicarius elegantulus; Eutetranychus; Metarhizium; Phenacoccus manihoti; Tetranychus; acaricides; adhesion; appressoria; bioassays; blastospores; conidia; fungi; genome; germination; greenhouses; hemp; homeostasis; hyphae; mortality; mycelium; shelf life; spiders; toxicology; viability; virulence
Abstract:
... Five isolates of Metarhizium sp. were evaluated for their pathogenicity against the spider mite (Tetranychus truncatus Ehara) (Acari: Tetranychidae) and Metarhizium sp. BCC 4849 resulted in the highest mortality (82%) on the 5th day post-inoculation (DPI). Subsequent insect bioassay data indicated similar high virulence against five other insects: African red mites (Eutetranychus africanus Tucker) ...
DOI:
10.3390/insects13010042

10. Three chemosensory proteins from the sweet potato weevil, Cylas formicarius, are involved in the perception of host plant volatiles

Author:
Jinfeng Hua; Yujie Fu; Qiaoling Zhou; Yongmei Huang; Huifeng Li; Tianyuan Chen; Daifu Ma; Zongyun Li
Source:
Pest management science 2021 v.77 no.10 pp. 4497-4509
ISSN:
1526-498X
Subject:
Cylas formicarius elegantulus; RNA interference; benzaldehyde; chemical communication; cineole; fluorescence; host plants; olfactometers; oviposition; pests; phenylethyl alcohol; sweet potatoes; vanillin
Abstract:
... BACKGROUND: Chemosensory proteins (CSPs) play important roles in chemical communication, but their precise physiological functions are still unclear. Cylas formicarius is the most serious pest attacking sweet potato around the world. At present, there is no effective way to control this pest. RESULTS: Our results showed that CforCSP1, 5 and 6 genes were highly expressed in the antennae of both sex ...
DOI:
10.1002/ps.6484

11. Breeding farmer and consumer preferred sweetpotatoes using accelerated breeding scheme and mother–baby trials

Author:
Ernest Baafi; Mavis Akom; Adelaide Agyeman; Cynthia Darko; Ted Carey
Source:
Open Agriculture 2020 v.5 no.1 pp. 548-557
ISSN:
2391-9531
Subject:
Cylas formicarius elegantulus; agriculture; beta-carotene; dry matter content; early development; ecological zones; farmers; food security; income; iron; sweet potatoes; taste; viruses; zinc; Ghana
Abstract:
... Increased sweetpotato utilization has become an important breeding objective recently, with much emphasis on the development of non-sweet sweetpotatoes for income and food security in Ghana. The objective of this study was to evaluate 26 elite non-sweet and less sweet sweetpotato genotypes with regard to their release as commercial varieties using mother–baby trial. The 26 sweetpotato genotypes we ...
DOI:
10.1515/opag-2020-0055

12. Development and characterization of microsatellites from the sweetpotato weevil, Cylas formicarius elegantulus

Author:
Phillip A. Wadl; Robert N. Trigiano; Sarah L. Boggess; Karen Harris‐Shultz; Livy H. Williams; Grant T. McQuate
Source:
Journal of applied entomology 2020 v.144 no.4 pp. 335-340
ISSN:
0931-2048
Subject:
Cylas formicarius elegantulus; Hawaii; cluster analysis; databases; entomology; microsatellite repeats; population genetics; sweet potatoes; transcriptome; Georgia; South Carolina
Abstract:
... To conduct population genetics analyses on sweetpotato weevils (Cylas formicarius elegantulus) collected from three populations in the United States, microsatellite loci were developed from sweetpotato weevil transcriptome sequences obtained from a publicly available database. Nineteen of 27 microsatellite loci tested were usable for population analyses. Sweetpotato weevil individuals from Georgia ...
DOI:
10.1111/jen.12738

13. Effects of Storage Periods of an Artificial Larval Diet on the Yield and Quality of Mass-Reared West Indian Sweet Potato Weevil (Coleoptera: Curculionidae)

Author:
Kinjo Misa; Chihiro Himuro; Atsushi Honma; Yusuke Ikegawa; Tsuyoshi Ohishi
Source:
Journal of economic entomology 2020 v.113 no.6 pp. 2613-2618
ISSN:
0022-0493
Subject:
Cylas formicarius elegantulus; Euscepes postfasciatus; Japan; artificial diets; body size; entomology; females; larvae; males; mass rearing; pests; storage time; sweet potatoes
Abstract:
... Artificial diets have been employed for the mass-rearing of numerous insects because of their ease of use and standardized quality. An ability to store artificial diets under nonrefrigerated conditions over the long term could improve the efficacy of mass-rearing systems considerably. However, it remains largely unknown how long artificial diets can be stored at such temperatures without any adver ...
DOI:
10.1093/jee/toaa190

14. Effects of high CO2 on mating success, mating duration, and sperm transfer in the West Indian sweet potato weevil, Euscepes postfasciatus

Author:
Ayame Nunohiro; Norikuni Kumano
Source:
Entomologia experimentalis et applicata 2020 v.168 no.5 pp. 387-397
ISSN:
0013-8703
Subject:
Cylas formicarius elegantulus; Euscepes postfasciatus; air; carbon dioxide; caves; copulation; environmental factors; females; habitats; insect nests; males; mass rearing; oxygen; reproductive success; social insects; soil; sperm competition; spermatozoa; walking; wood
Abstract:
... Most terrestrial animals live in natural atmospheric conditions, but some are also adapted to low oxygen (hypoxic) or high‐carbon dioxide (hypercapnic) conditions, such as in social insect nests, soil, caves, wood, and decaying material. Although it is possible that individuals adapt their behaviour to the environmental condition of their habitats, mating behaviour under ecologically possible rang ...
DOI:
10.1111/eea.12885

15. Evaluation of the selected sweet potato genotypes tolerance to sweet potato weevil (Cylas puncticollis Boheman)

Author:
L. A. Ochieng
Source:
Journal of horticultural science & biotechnology 2020 v.95 no.2 pp. 192-202
ISSN:
2380-4084
Subject:
Curculionidae; Cylas formicarius elegantulus; breeding programs; genotype; insect resistance; larvae; parents; pests; starch; sucrose; sweet potatoes; Sub-Saharan Africa
Abstract:
... Sweet potato weevil (Cylas punticollis Boheman) is a serious pest throughout sub-Saharan Africa. A study to evaluate 51 sweet potato genotypes for their tolerance to the weevil was conducted in a controlled experiment of no-choice arena. Genotype Tainung was the most susceptible to C. puncticollis. Genotypes Obugi and 5 Nyandere were the most tolerant to C. puncticollis. Many of the genotypes that ...
Handle:
10113/6880874
DOI:
10.1080/14620316.2019.1652118

16. Reduced Emergence of Cylas formicarius elegantulus (Coleoptera: Curculionidae) from Sweet Potato Roots by Heterorhabditis indica

Author:
Roxana Y. Myers; Charmaine D. Sylva; Cathy L. Mello; Kirsten A. Snook
Source:
Journal of economic entomology 2020 v.113 no.3 pp. 1129-1133
ISSN:
0022-0493
Subject:
Curculionidae; Cylas formicarius elegantulus; Hawaii (island); Heterorhabditis indica; Ipomoea batatas; abnormal development; bitterness; entomology; exports; inoculum density; mortality; pests; quarantine; sweet potatoes
Abstract:
... Okinawan sweet potato, Ipomoea batatas, is an important food staple and export crop for the Island of Hawaii. Cylas formicarius elegantulus, sweet potato weevil, is a major quarantine pest that causes severe destruction to the crop. Root malformation and a bitter taste occur when larvae feed and tunnel within the storage root. Off-grade roots are often left in the field after harvest and serve as ...
DOI:
10.1093/jee/toaa054

17. Screening barrier plants to reduce crop attack by sweet potato weevil (Cylas formicarius)

Author:
Taiwo E Dada; Jian Liu; Anne C Johnson; Mudassir Rehman; Geoff M Gurr
Source:
Pest management science 2020 v.76 no.3 pp. 894-900
ISSN:
1526-498X
Subject:
Curculionidae; Cylas formicarius elegantulus; Ipomoea batatas; Zea mays subsp. mays; basil; chives; habitats; imagos; immigration; leaves; mint; olfactometers; oviposition; pest management; pests; plant damage; roots; screening; stems; sweet potatoes; sweetcorn
Abstract:
... BACKGROUND: Sweet potato weevil, Cylas formicarius (Fabricius) attacks stems and storage roots of sweet potato, Ipomoea batatas, and is a major pest of this globally significant crop. To minimize the immigration of weevils into sweet potato fields from nearby donor habitat, we assessed scope for a barrier plant approach. Here, we report a novel, two‐stage, multiple choice olfactometer method to sc ...
DOI:
10.1002/ps.5594

18. Trade-off Investment between Tonic Immobility and Mate Search in the Sweetpotato Weevil, Cylas formicarius (Coleoptera: Brentidae)

Author:
Haoyong Ouyang; Pengxiang Wu; Runzhi Zhang; Muhammad Haseeb
Source:
Insects 2020 v.11 no.11 pp. -
ISSN:
2075-4450
Subject:
Cylas formicarius elegantulus; artificial selection; females; males; mating behavior; olfactometers; tonic immobility
Abstract:
... Tonic immobility (TI) is a well-known anti-predator strategy adopted by diverse preys. Numerous studies on the cost–benefit involve in TI have been reported. Although, some studies have reported the effect of mating behavior on TI, few studies highlight the phases of mate search. In the present study, we investigated the relationship between mate search and TI behavior in the sweetpotato weevil (S ...
DOI:
10.3390/insects11110774

19. A New System for Detecting Initial Colonization by Invasive Pests and Their Locations

Author:
Yusuke Ikegawa; Atsushi Honma; Chihiro Himuro; Takashi Matsuyama
Source:
Journal of economic entomology 2019 v.112 no.6 pp. 2976-2983
ISSN:
0022-0493
Subject:
Curculionidae; Cylas formicarius elegantulus; Ryukyu Archipelago; entomology; host plants; monitoring; pests; quarantine; sex pheromones
Abstract:
... Quarantine pests in plants can be a serious agricultural problem; many eradication programs using area-wide control measures have been implemented worldwide to combat this threat. Surveillance measures using sex pheromone (in general, male-attractant) traps are also widely implemented for rapid control and eradication of invasive pests. If initial pest colonization can be determined based on tempo ...
DOI:
10.1093/jee/toz228

20. A sex pheromone‐baited trapping system for management of sweetpotato weevil, Cylas formicarius (Coleoptera: Brentidae)

Author:
Masilamany Dilipkumar; Shari Erwan‐Shah; Abdullah Anuar; Annamalai Sivapragasam
Source:
Journal of applied entomology 2019 v.143 no.4 pp. 408-416
ISSN:
0931-2048
Subject:
Curculionidae; Cylas formicarius elegantulus; bait traps; canopy; color; cost effectiveness; crop damage; detergents; growers; leaves; males; monitoring; pheromone traps; polyethylene terephthalates; sex pheromones; sweet potatoes; trapping; Malaysia
Abstract:
... A potent male attractant of sweetpotato weevil helps in monitoring and control of sweetpotato weevil in many production areas around the world. At present, it has not been used in Malaysia. Cost of the components of a trapping system is a major constraint in the adoption of male lure‐baited trapping by growers in Malaysia. Seven field trapping experiments were conducted from February 2013 to Novem ...
DOI:
10.1111/jen.12602

21. Agronomic Performance and Susceptibility of Seven Ghanaian Improved Sweet Potato Varieties to the Sweet Potato Weevil, Cylas spp. (Coleoptera: Brentidae) in Coastal Savanna Zone of Ghana

Author:
M. Adom; K.O. Fening; D.D. Wilson; K. Adofo; A.Y. Bruce
Source:
African entomology 2019 v.27 no.2 pp. 312-321
ISSN:
1021-3589
Subject:
Curculionidae; Cylas formicarius elegantulus; Ipomoea batatas; agroecology; agronomic traits; crop production; farmers; field experimentation; food crops; insect infestations; root crown; savannas; sweet potatoes; wet season; Ghana
Abstract:
... Sweet potato (Ipomoea batatas (L.) Lam. is an important food crop adaptable to a broad range of agro-ecological conditions. The knowledge of the performance of the available varieties under a specific ecological condition is important to improve the production. A field experiment was carried out at the University of Ghana farm during the major and minor rainy seasons of 2015 to determine the yield ...
DOI:
10.4001/003.027.0312

22. Farmer Reported Pest and Disease Impacts on Root, Tuber, and Banana Crops and Livelihoods in Rwanda and Burundi

Author:
Joshua Sikhu Okonya; Walter Ocimati; Anastase Nduwayezu; Déo Kantungeko; Nicolas Niko; Guy Blomme; James Peter Legg; Jürgen Kroschel
Source:
Sustainability 2019 v.11 no.6 pp. -
ISSN:
2071-1050
Subject:
Aleyrodidae; Cosmopolites sordidus; Cylas formicarius elegantulus; Phytophthora infestans; Tuber (Tuberaceae); Xanthomonas; bananas; cassava; crop losses; crop production; cutworms; farmers; food security; households; integrated pest management; interviews; livelihood; potatoes; profitability; sweet potatoes; tubers; viruses; Burundi; Rwanda
Abstract:
... Biotic constraints cause major crop losses and, hence, food insecurity in sub-Saharan Africa. This study documented the popularity, production constraints, pests and diseases, farmers’ perceptions on the severity of biotic constraints and the impact of related crop losses on household food security for the key root, tuber and banana (RTB) crops (cassava, potato, sweetpotato and banana). Farm ...
DOI:
10.3390/su11061592

23. Host preference of sweetpotato weevil, Cylas formicarius elegantulus (Summers): an example of Hopkins’ host-selection principle

Author:
Jie Chen; Michael J. Stout; Julien Beuzelin; Tara P. Smith; Don LaBonte; Jeff M. Murray; Jeffrey A. Davis
Source:
Arthropod-plant interactions 2019 v.13 no.5 pp. 779-786
ISSN:
1872-8855
Subject:
Cylas formicarius elegantulus; Ipomoea batatas; adults; cultivars; females; growers; host preferences; insect pests; insect resistance; larvae; oviposition; phytophagous insects; rearing; roots; summer; sweet potatoes
Abstract:
... Sweetpotato weevil (SPW), Cylas formicarius elegantulus (Summers), is the most damaging root-feeding insect of sweetpotato, Ipomoea batatas (L.) Poir., worldwide. Larval feeding on storage roots reduces yield and induces terpene production, rendering roots inedible. Selection of sweetpotato cultivars with resistance to insect pests has been carried out for over a century but no high yielding, prod ...
DOI:
10.1007/s11829-019-09704-0

24. Method for DNA Isolation From Sweetpotato Weevil (Coleoptera: Curculionidae) Collected in Pheromone-Baited Traps

Author:
Phillip A Wadl; Livy H Williams; Karen R Harris-Shultz; Grant T McQuate
Source:
Journal of economic entomology 2019 v.112 no.2 pp. 1001-1003
ISSN:
1938-291X
Subject:
Curculionidae; Cylas formicarius elegantulus; DNA; bait traps; ethanol; funnel traps; gel electrophoresis; males; molecular weight; pheromone traps; polymerase chain reaction; summer
Abstract:
... This study provides a protocol for the isolation of high-quality DNA from sweetpotato weevils (Cylas formicarius elegantulus (Summers)) collected from pheromone-baited aerial funnel traps. This study was based on our discovery that a 2-wk collection interval of sweetpotato weevils from pheromone traps did not permit isolation of intact high-quality genomic DNA. To test the effect of collection met ...
DOI:
10.1093/jee/toy390

25. Nuclease activity decreases the RNAi response in the sweetpotato weevil Cylas puncticollis

Author:
Katterinne Prentice; Guy Smagghe; Godelieve Gheysen; Olivier Christiaens
Source:
Insect biochemistry and molecular biology 2019 v.110 pp. 80-89
ISSN:
0965-1748
Subject:
Cylas formicarius elegantulus; RNA interference; crop production; digestive system; double-stranded RNA; enzyme activity; eukaryotic cells; gene expression; insects; messenger RNA; mortality; nucleases; pest control; pests; quantitative polymerase chain reaction; reporter genes; sweet potatoes; transcriptome; Sub-Saharan Africa
Abstract:
... RNA interference (RNAi) refers to the process of suppression of gene expression in eukaryotes, which has a great potential for the control of pest and diseases. Unfortunately, the efficacy of this technology is limited or at best variable in some insects. In the African sweet potato weevil (SPW) Cylas puncticollis, a devastating pest that affects the sweet potato production in Sub-Saharan Africa ( ...
DOI:
10.1016/j.ibmb.2019.04.001

26. Origins, Divergence, and Contrasting Invasion History of the Sweet Potato Weevil Pests Cylas formicarius (Coleoptera: Brentidae) and Euscepes batatae (Coleoptera: Curculionidae) in the Asia-Pacific

Author:
Dean R. Brookes; James P. Hereward; Gimme H. Walter; Michael J. Furlong
Source:
Journal of economic entomology 2019 v.112 no.6 pp. 2931-2939
ISSN:
0022-0493
Subject:
Cylas formicarius elegantulus; Euscepes; Ipomoea batatas; entomology; genetic variation; geographical distribution; mitochondria; population structure; probability; sweet potatoes; India; South America
Abstract:
... Cylas formicarius F. and Euscepes batatae Waterhouse are the most damaging sweet potato insect pests globally. Both weevils are thought to have invaded the Pacific alongside the movement of sweet potato (Ipomoea batatas (L.) Lam. Convolvulaceae), with C. formicarius having originated in India and E. batatae in Central or South America. Here we compare the genetic relationships between populations ...
DOI:
10.1093/jee/toz198

27. Sweetpotato Cultivar Trials on Hawai‘i Island

Author:
Susan C. Miyasaka; Marisa Wall; Don LaBonte; Alton Arakaki
Source:
HortTechnology 2019 v.29 no.6 pp. 967-975
ISSN:
1063-0198
Subject:
Cylas formicarius elegantulus; Ipomoea batatas; anthocyanins; cultivars; fructose; glucose; growth habit; landraces; maltose; soil; sucrose; sweet potatoes; Louisiana
Abstract:
... Twelve sweetpotato (Ipomoea batatas var. batatas) accessions/cultivars/landraces (entries) were evaluated for yield, resistance to pests, and quality in five field trials planted at Pepe`ekeo, Hawai‘i Island, and replicated over time with blocks planted on May and Oct. 2014, Feb. and July 2015, and Jan. 2016. Plots were harvested at 4.5 to 6 months after planting. In the first two field trials, lo ...
DOI:
10.21273/HORTTECH04387-19

28. The virulence improvement of Beauveria bassiana in infecting Cylas formicarius modulated by various chitin based compounds

Author:
triono bagus saputro; YUSMANI PRAYOGO; FARADIBA LAZUARDI ROHMAN; NUR HIDAYATUL ALAMI
Source:
Biodiversitas 2019 v.20 no.9 pp. -
ISSN:
2085-4722
Subject:
Bassiana; Beauveria bassiana; Cylas formicarius elegantulus; Ipomoea batatas; biological control agents; chitin; conidia; culture media; feeds; food production; insects; molluscs; mortality; pests; sweet potatoes; viability; virulence
Abstract:
... Saputro TB, Prayogo Y, Rohman FL, Alami NH. 2019. The virulence improvement of Beauveria bassiana in infecting Cylas formicarius modulated by various chitin based compounds. Biodiversitas 20: 2486-2493. Sweet potato (Ipomoea batatas L.) is one of alternative carbohydrate source with an important role in food production, animal feed industries, and as raw materials for other derivatives. However, s ...
DOI:
10.13057/biodiv/d200909

29. Appropriate number of inoculated eggs for mass-rearing the West Indian sweet potato weevil, Euscepes postfasciatus (Coleoptera: Curculionidae)

Author:
Chihiro Himuro; Norikuni Kumano; Atsushi Honma; Yusuke Ikegawa; Tsuyoshi Ohishi
Source:
Applied entomology and zoology 2018 v.53 no.1 pp. 157-164
ISSN:
0003-6862
Subject:
Cylas formicarius elegantulus; Euscepes postfasciatus; adults; body size; eggs; females; mass rearing; progeny; sterile insect technique
Abstract:
... It is necessary to establish an economical mass-rearing system for the West Indian sweet potato weevil Euscepes postfasciatus (Fairmaire) so that large numbers can be created for use in the sterile insect technique (SIT) to control wild infestations. Both the quality of offspring and the number of adult weevils produced are important. As an adult female with a dry weight of less than 1.4 mg has an ...
DOI:
10.1007/s13355-017-0536-6

30. Behavioral Repertory of Adult Cylas formicarius (Fabricius) (Coleoptera: Brentidae)

Author:
Christopher K. Starr; David D. Wilson; Stanley J. Kays
Source:
Coleopterists' bulletin 2018 v.72 no.1 pp. 85-92
ISSN:
0010-065X
Subject:
Cylas formicarius elegantulus; adults; females; grooming (animal behavior); males; sexual dimorphism
Abstract:
... Adult female and male sweetpotato weevils, Cylas formicarius (Fabricius), have repertories of at least 19 and 21 behavior patterns, respectively. These are described and named, including eight self-grooming patterns. Consistent with the species' slight sexual dimorphism, few behavior patterns are peculiar to one sex. The sequence of self-grooming movements is analyzed for each sex. Comparative ass ...
DOI:
10.1649/0010-065X-72.1.85

31. Effects of Irradiation Dose on Sperm Production, Insemination, and Male Mating Possible Period in the Sweetpotato Weevil (Coleoptera: Brentidae)

Author:
Satoshi Hiroyoshi; Takayuki Mistunaga; Tsuguo Kohama; Gadi V P Reddy
Source:
Journal of economic entomology 2018 v.111 no.3 pp. 1151-1156
ISSN:
1938-291X
Subject:
Curculionidae; Cylas formicarius elegantulus; adults; insect pests; insemination; irradiation; males; spermatozoa; spermiogenesis; sterile insect technique; survival rate; sweet potatoes
Abstract:
... The sterile insect technique (SIT) has been used for the control or eradication of target insect pests. To successfully apply SIT, it is very important to clarify the effect of irradiation on male reproduction in the target pest, because their mating and spermiogenesis abilities affect the success of eradication program. The sweetpotato weevil, Cylas formicarius (Fabricius) (Coleoptera: Brentidae) ...
DOI:
10.1093/jee/tox363

32. Effects of X-ray irradiation on male sperm transfer ability and fertility in the sweetpotato weevils Euscepes postfasciatus (Coleoptera: Curculionidae) and Cylas formicarius (Coleoptera: Brentidae)

Author:
Norikuni Kumano; Dai Haraguchi; Kaori Tsurui-Sato
Source:
Applied entomology and zoology 2018 v.53 no.4 pp. 485-492
ISSN:
0003-6862
Subject:
Cylas formicarius elegantulus; Euscepes postfasciatus; X-radiation; gamma radiation; insect pests; irradiation; male sterility; males; physical properties; spermatozoa; sterile insect technique; Ryukyu Archipelago
Abstract:
... Gamma radiation from isotopic sources has been used in sterile insect technique (SIT) programs worldwide, but it might be difficult to continue using these sources in future SIT programs because of social issues. Therefore, an alternative sterilization source to gamma rays, such as X-rays, needs to be developed. The physical properties of radiation are different between gamma rays and X-rays: for ...
DOI:
10.1007/s13355-018-0578-4

33. Efficacy of Three Plant Powders in the Control of Cylas puncticollis (Boheman) (Coleoptera: Curculionidae) on Sweet Potato During Storage

Author:
A.I. Nta; S.I. Okweche; S.B. Umoetok
Source:
African entomology 2018 v.26 no.1 pp. 141-149
ISSN:
1021-3589
Subject:
Aframomum melegueta; Curculionidae; Cylas formicarius elegantulus; Dennettia tripetala; Xylopia aethiopica; adults; alkaloids; bioassays; carotenoids; flavonoids; fruits; leaves; mortality; pests; phenols; phytopharmaceuticals; powders; quantitative analysis; saponins; steroids; sweet potatoes; tannins; tubers; Nigeria
Abstract:
... Biological assays were carried out to determine the effectiveness of powders of three locally available plants, Dennettia tripetala (G. Backer), Xylopia aethiopica (A. Rich) and Aframomum melegueta (K. Schum), for the control of Cylas puncticollis a sweet potato weevil. Powders of the leaves and fruits of each plant were separately applied at concentrations of 1, 3 and 5% (w/w for powders) for bio ...
DOI:
10.4001/003.026.0141

34. Evaluation of insecticides for the management of rough sweetpotato weevil, Blosyrus asellus (Coleoptera: Curculionidae) in Hawai'i island

Author:
Ishakh Pulakkatu-thodi; Sharon Motomura-Wages; Susan Miyasaka
Source:
Crop protection 2018 v.114 pp. 223-227
ISSN:
0261-2194
Subject:
Beauveria bassiana; Curculionidae; Cylas formicarius elegantulus; carbaryl; clothianidin; crop rotation; exports; immatures; insects; pests; planting; roots; staple crops; sweet potatoes; Hawaii
Abstract:
... Sweetpotato is an important staple food crop in Hawai'i, both for local consumption and export. Insect damage, especially from weevils, is a major production constraint of sweetpotato in the state of Hawai'i. Rough sweetpotato weevil, Blosyrus asellus (Olivier) is an invasive pest recently detected in the Hawaiian Islands. The immature stages of the weevil gouge shallow grooves on surfaces of stor ...
DOI:
10.1016/j.cropro.2018.08.035
CHORUS:
10.1016/j.cropro.2018.08.035

35. Modeling the impact of sweetpotato weevils on storage root yield

Author:
Daniel A. Akansake; Putri E. Abidin; E. E. Carey
Source:
Open Agriculture 2018 v.3 no.1 pp. 319-325
ISSN:
2391-9531
Subject:
Curculionidae; Cylas formicarius elegantulus; Diplopoda; Ipomoea batatas; attainable yield; crop yield; genotype; linear models; regression analysis; roots; sweet potatoes; Ghana
Abstract:
... This study estimated the amount of loss in storage roots caused by various levels of damage caused by sweetpotato weevils (Cylas spp). Seven varieties of sweetpotato (Ipomoea batatas L. (Lam)) were evaluated in three production sites in northern Ghana for two years (2014 and 2015). Yield data for each experimental plot were collected. A regression analysis was carried out using the generalized lin ...
DOI:
10.1515/opag-2018-0035

36. Soil insect crop pests and their integrated management in East Africa: A review

Author:
I. Nyamwasa; K. Li; A. Rutikanga; D.N.T. Rukazambuga; S. Zhang; J. Yin; C. Ya-zhong; X.X. Zhang; X. Sun
Source:
Crop protection 2018 v.106 pp. 163-176
ISSN:
0261-2194
Subject:
Agrotis segetum; Apoininae; Cosmopolites sordidus; Cylas formicarius elegantulus; Ophiomyia phaseoli; Scarabaeidae; Termitidae; beans; crops; cutworms; insect biology; insect larvae; insecticides; integrated pest management; monitoring; plant pests; soil insects; Eastern Africa
Abstract:
... Soil-dwelling pests are generally poorly documented in East Africa due to their cryptic nature, which complicates monitoring, so the aim of this review is to compile and elucidate the current soil insect pest and management situation in this region. Fifty-five (55) soil insect pests are reported from across East Africa, and twenty (36%) and seventeen (30%) species of Scarabaeidae and Termitidae, r ...
DOI:
10.1016/j.cropro.2017.11.017

37. Chronic effects and horizontal transmission of Metarhizium anisopliae strain QS155 infection in the sweet potato weevil, Cylas formicarius (Coleoptera: Brentidae)

Author:
Ronnie Dotaona; Bree A.L. Wilson; Mark M. Stevens; Joanne Holloway; Gavin J. Ash
Source:
Biological control 2017 v.114 pp. 24-29
ISSN:
1049-9644
Subject:
Curculionidae; Cylas formicarius elegantulus; Metarhizium anisopliae; adults; conidia; eggs; fecundity; females; host plants; long term effects; males; maternal exposure; mortality; pests; plant tissues; reproductive success; sweet potatoes; Papua New Guinea
Abstract:
... Cylas formicarius is a major pest of sweetpotato in Papua New Guinea. In this study, the chronic effects of infection with Metarhizium anisopliae strain QS155 in adult C. formicarius were investigated. Female fecundity was significantly reduced in treatments where females were infected directly and maintained in pairs with either infected or uninfected males, and to a statistically equivalent leve ...
DOI:
10.1016/j.biocontrol.2017.07.008

38. Genotype Stability Index for Root Yield and Tolerance to Sweetpotato Weevil Cylas puncticolis: A Tool for Identifying Climate Smart Varieties

Author:
A. Chalwe; M. Chiona; S. Sichilima; J. Njovu; C. Chama; D. Ndhlovu
Source:
Open Agriculture 2017 v.2 no.1 pp. 166-174
ISSN:
2391-9531
Subject:
Curculionidae; Cylas formicarius elegantulus; analysis of variance; climate; environmental factors; genotype; pests; rain; selection index; sweet potatoes; temperature
Abstract:
... Despite the ability of sweetpotato to grow in marginal areas, large differential genotypic responses have been reported under varying environmental conditions. Differences in pest and disease pressure contribute significantly to inconsistencies in performance of genotypes in various environments. Using a randomized complete block design, eight sweetpotato genotypes were evaluated in one location s ...
DOI:
10.1515/opag-2017-0017

39. Identification of simple sequence repeat markers for sweetpotato weevil resistance

Author:
Benard Yada; Agnes Alajo; Gorrettie N. Ssemakula; Gina Brown-Guedira; Milton Anyanga Otema; Philip C. Stevenson; Robert O. M. Mwanga; G. Craig Yencho
Source:
Euphytica 2017 v.213 no.6 pp. 129
ISSN:
0014-2336
Subject:
Curculionidae; Cylas formicarius elegantulus; Ipomoea batatas; coumaric acids; cultivars; esters; genotype; genotyping; germplasm; heritability; landraces; loci; microsatellite repeats; plant breeding; progeny; sweet potatoes; transgressive segregation
Abstract:
... The development of sweetpotato [Ipomoea batatas (L.) Lam] germplasm with resistance to sweetpotato weevil (SPW) requires an understanding of the biochemical and genetic mechanisms of resistance to optimize crop resistance. The African sweetpotato landrace, ‘New Kawogo’, was reported to be moderately resistant to two species of SPW, Cylas puncticollis and Cylas brunneus. Resistance has been associa ...
DOI:
10.1007/s10681-017-1917-1

40. Preliminary observations on use of Beauveria bassiana for the control of the sweet potato weevil (Cylas sp.) in South Africa

Author:
Igenicious Hlerema; Sunette Laurie; Bahlebi Eiasu
Source:
Open Agriculture 2017 v.2 no.1 pp. 595-599
ISSN:
2391-9531
Subject:
Beauveria bassiana; Cylas formicarius elegantulus; Hyphomycetes; control methods; cultivars; dipping; experimental design; insects; leaves; pest management; pests; planting; roots; spraying; sweet potatoes; South Africa
Abstract:
... Sweet potato weevils (Cylas puncticollis and C. formicarius) are notorious pests of sweet potato and cause severe losses in marketable yield. The study tested the use of Beauveria bassiana ((Balsamo) Vuillemin) (Deuteromycota: Hyphomycetes) for controlling sweet potato weevils. An experiment was conducted using four treatments: 1) dipping sweet potato cuttings in solution of 1 g/litre B. bassiana ...
DOI:
10.1515/opag-2017-0063

41. RNAi‐based gene silencing through dsRNA injection or ingestion against the African sweet potato weevil Cylas puncticollis (Coleoptera: Brentidae)

Author:
Katterinne Prentice; Olivier Christiaens; Ine Pertry; Ana Bailey; Chuck Niblett; Marc Ghislain; Godelieve Gheysen; Guy Smagghe
Source:
Pest management science 2017 v.73 no.1 pp. 44-52
ISSN:
1526-498X
Subject:
Cylas formicarius elegantulus; Diabrotica virgifera virgifera; RNA interference; digestive system; double-stranded RNA; essential genes; ingestion; insecticidal properties; nucleases; pest control; pests; plant protection; toxicity; Sub-Saharan Africa
Abstract:
... BACKGROUND: RNA interference (RNAi) technology can potentially serve as a suitable strategy to control the African sweet potato weevil Cylas puncticollis (SPW), which is a critical pest in sub‐Saharan Africa. Important prerequisites are required to use RNAi in pest control, such as the presence of an efficient RNAi response and the identification of suitable target genes. RESULTS: Here we evaluate ...
DOI:
10.1002/ps.4337

42. Sweetpotato weevil, Cylas formicarius (Fab.) (Coleoptera: Brentidae) avoids its host plant when a virulent Metarhizium anisopliae isolate is present

Author:
Ronnie Dotaona; Bree A.L. Wilson; Gavin J. Ash; Joanne Holloway; Mark M. Stevens
Source:
Journal of invertebrate pathology 2017 v.148 pp. 67-72
ISSN:
0022-2011
Subject:
Curculionidae; Cylas formicarius elegantulus; Metarhizium anisopliae; adults; agar; females; host plants; insects; males; olfactometers; roots; smell; sweet potatoes; virulence; virulent strains
Abstract:
... Metarhizium anisopliae has a wide range of coleopteran hosts, including weevils. Some susceptible insects are known to modify their behavior to prevent infection, typically detecting virulent strains by olfaction, and avoiding physical contact with sources of infection. Laboratory olfactometer assays were conducted on the sweetpotato weevil Cylas formicarius to test the hypothesis that insects wou ...
DOI:
10.1016/j.jip.2017.05.010

43. Age-Related Sperm Production, Transfer, and Storage in the Sweet Potato Weevil, Cylas formicarius (Fabricius) (Coleoptera: Curculionidae)

Author:
Satoshi Hiroyoshi; Tsuguo Kohama; Gadi V. P. Reddy
Source:
Journal of insect behavior 2016 v.29 no.6 pp. 689-707
ISSN:
0892-7553
Subject:
Curculionidae; Cylas formicarius elegantulus; females; insect behavior; insemination; males; spermatheca; spermatogenesis; spermatozoa
Abstract:
... The relationship between sperm production, insemination rate, and sperm transfer were studied in the sweet potato weevil, Cylas formicarius. Older adult males retained more sperm in the testes-seminal vesicle complex (TSC) and thus more was ejaculated into females at first mating. Number of matings per day for males was relatively constant across different ages, and frequent mating resulted in a r ...
DOI:
10.1007/s10905-016-9590-0

44. Invertebrate pests and diseases of sweetpotato (Ipomoea batatas): a review and identification of research priorities for smallholder production

Author:
A.C. Johnson; G.M. Gurr
Source:
Annals of applied biology 2016 v.168 no.3 pp. 291-320
ISSN:
0003-4746
Subject:
diagnostic techniques; Cylas formicarius elegantulus; sweet potatoes; drought; pheromone traps; crop yield; food security; burning; population growth; roots; decision making; postharvest losses; Ipomoea batatas; viruses; planting; industrialization; pathogens; harvesting; invertebrates; crop residues; developing countries; fallow; climate change; livestock; pests; risk reduction; pesticides; inoculum; Curculionidae; biological control; plant protection; soil nutrients; farmers; nutrition; Formicidae; composting; developed countries
Abstract:
... Sweetpotato has been the subject of little research worldwide compared with other major crop staples, and this is especially so for less developed countries where sweetpotato is critical for food security. This review synthesises information on plant protection issues that affect smallholder sweetpotato farmers in less developed countries to identify major issues and suggest research priorities. T ...
DOI:
10.1111/aab.12265

45. Reduced dispersal and survival in the sweet potato weevil (Euscepes postfasciatus) after irradiation

Author:
Katsuya Ichinose; Keiji Yasuda; Nobuo Yamashita; Masaya Matsumura; Yoshihiro Okada
Source:
Agricultural and forest entomology 2016 v.18 no.2 pp. 157-166
ISSN:
1461-9555
Subject:
sterile insect technique; Cylas formicarius elegantulus; longevity; autumn; Euscepes postfasciatus; sweet potatoes; winter; spring; summer; irradiation; Japan
Abstract:
... In southern Japan, sweet potato weevils Euscepes postfasciatus (Fairmaire) are being eradicated using the sterile insect technique because of their damaging effects on sweet potato crops. However, the effect of irradiation on the dispersal and survival of this species needs to be evaluated. We observed the dispersal of normal and irradiated weevils for 21 days after their release in a sweet potato ...
DOI:
10.1111/afe.12149

46. Sweet potato cultivar and harvest date influence on Cylas formicarius damage

Author:
T. W. Zimmerman; C. Montilla; S. M. A. Crossman
Source:
Acta horticulturae 2016 no.1118 pp. 153-156
ISSN:
0567-7572
Subject:
Curculionidae; Cylas formicarius elegantulus; Ipomoea batatas; cultivars; farmers; growing season; harvest date; leaves; males; pests; pheromones; roots; row spacing; soil; stems; sweet potatoes; traps; Caribbean; Virgin Islands
Abstract:
... Sweet potato weevil (Cylas formicarius) is the most serious pest of sweet potato (Ipomoea batatas), not only in the Virgin Islands but also throughout the Caribbean. It causes damage in the field to leaves, stems and tuberous roots. Our objective was to evaluate harvest date and weevil damage in 18 sweet potato cultivars. Twelve sweet potato cultivars were from in vitro virus-free material and six ...
DOI:
10.17660/ActaHortic.2016.1118.22

47. An Insight into Sweet Potato Weevils Management: A Review

Author:
Hue Seow-Mun; Low Min-Yang
Source:
Psyche 2015 v.2015 pp. -
ISSN:
0033-2615
Subject:
Curculionidae; Cylas formicarius elegantulus; bacteria; biotechnology; entomopathogenic fungi; financial economics; food crops; genomics; integrated pest management; intercropping; mechanism of action; pesticides; pests; plantations; sex pheromones; subtropics; sweet potatoes
Abstract:
... Sweet potato is an important food crop that is grown widely in tropical and subtropical regions. Sweet potato weevil is the most disastrous pest affecting sweet potato plantations, causing millions of dollars losses annually. An effective integrated pest management (IPM) method will help to prevent economic losses, and it is crucial to understand the factors that contribute to weevil infestation a ...
DOI:
10.1155/2015/849560

48. Screening of tropical isolates of Metarhizium anisopliae (Hypocreales: Clavicipitaceae) for virulence to the sweet potato weevil, Cylas formicarius (Coleoptera: Brentidae)

Author:
Ronnie Dotaona; Bree A.L. Wilson; Mark M. Stevens; Joanne Holloway; Gavin J. Ash
Source:
International journal of tropical insect science 2015 v.35 no.4 pp. 153-163
ISSN:
1742-7592
Subject:
Cylas formicarius elegantulus; Metarhizium anisopliae; adults; bioassays; germination; greenhouses; internal transcribed spacers; lethal concentration 50; mortality; pests; screening; soil sampling; sweet potatoes; temperature; transcription (genetics); virulence; Australia
Abstract:
... The sweet potato weevil (SPW), Cylas formicarius, is a serious pest of sweet potato in Australia and Papua New Guinea. Ten strains of Metarhizium sp. isolated from Australian soil samples were evaluated for their growth characteristics and screened for virulence to adult SPW under laboratory conditions. All isolates except QD62 (48.6%) had moderate to high germination (66–97%), and all took 2 to 4 ...
DOI:
10.1017/S1742758415000211

49. Are Sweetpotato Weevils (Coleoptera: Brentidae) Differentially Attracted to Certain Colors?

Author:
Nirupa Gadi; G.V.P. Reddy
Source:
Annals of the Entomological Society of America 2014 v.107 no.1 pp. 274-278
ISSN:
0013-8746
Subject:
Curculionidae; Cylas formicarius elegantulus; behavior change; color; field experimentation; growers; insects; pesticides; pheromone traps; population; sweet potatoes; toxicity; trapping; tubers
Abstract:
... The sweetpotato weevil Cylas formicarius (F.) (Coleoptera: Brentidae) is one of the most serious insects causing damage to sweetpotatoes in the world. Small populations of these insects can cause severe damage to tubers of the crop. Without proper and effective control, weevil populations are likely to cause a huge or complete loss of sweetpotato production in sweetpotato growing areas. Consequent ...
DOI:
10.1603/AN13135

50. Biology of sweet potato weevil, Cylas formicarius F. on sweet potato

Author:
M. Devi; K. Indira Kumar; R.F. Niranjana
Source:
Journal of entomological research 2014 v.38 no.1 pp. 53-57
ISSN:
0974-4576
Subject:
Cylas formicarius elegantulus; eggs; larvae; pupae; research; sweet potatoes
Abstract:
... The life stages of Cylas formicarius in sweet potato tubers were assessed during first and second generations. In first generation, the highest egg period was recorded in Co-3 (White) (5.50 days). The lowest larval period was recorded in Kanjangad (24.16 days) while highest pupal period was recorded in Kanaka (Red) (7.56 days) and the total life cycle period in days was highest in Co-3 (White) (42 ...