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Brassica oleracea var. botrytis; Gossypium hirsutum; Ricinus communis; Spodoptera frugiperda; Zea mays; adults; biometry; cauliflower; corn; cotton; diet; fecundity; females; head; larvae; pest management; pests; pupae; India
Abstract:
... BACKGROUND: The fall armyworm (FAW) Spodoptera frugiperda (J. E. Smith), native to the Americas, is a new invasive pest that was reported in India for the first time in May 2018. Being polyphagous, FAW can infest several different hosts and increase its population all year round. In this context, the present study was conducted under laboratory conditions to evaluate the biological parameters of F ...
... Pesticides are extensively used to control pests, diseases, and weeds in order to increase agricultural production. Usage of indiscriminate doses and persistent pesticides has not only caused resistance issues in insect pests but has also had deleterious effects on non-target organisms (beneficial insects, fish, and wildlife) and caused environmental contamination (soil, water, and air) through le ...
Bemisia tabaci; cotton; eggs; fecundity; females; flonicamid; insecticide resistance; instars; life tables; longevity; males; ovicides; pest control; pests
Abstract:
... Bemisia tabaci Gennadius (Homoptera: Aleyrodidae) is a sporadic pest of cotton and several other agricultural crops. The expansion of insecticide resistance has compelled the assessment of chemically novel insecticides. Therefore, the lethal effects of systemic insecticides, flonicamid 50 WG (pyridincarboxamide) and spirotetramat 240 SC (ketoenole) were assessed against different life stages (egg, ...
... Soybean aphid, Aphis glycines Matsumura (Hemiptera: Aphididae), is an important soybean pest in North America. In this study, A. glycines was fed on detached leaves of Glycine max (L.) Merrill (Fabaceae) at 20, 23, 26, 29, and 32 °C under 3 rearing methods: leaf-disc method, filter paper method, and moisturized cotton method. Aphis glycines life parameters, including nymph stage duration, adult li ...
... Bemisia tabaci (Gennadius) Asia II 1 cause significant economic losses to cotton crop, directly by feeding on sap and indirectly through virus transmission. Although the current control methods are the combination of different tactics but still the chemical control is heavily relied. B. tabaci has gained resistance to majority of the insecticides which has made it difficult to manage this pest usi ...
... Bacillus thuringiensis transgenic cotton, is being a vital part of a pest management program, effectively controlling Helicoverpa armigera. However, the success of Bt technology depends on the persistent susceptibility of target pests to the Bt cotton. In this respect, bioassays were conducted on laboratory reared H. armigera population (1ˢᵗ, 2ⁿᵈ, 3ʳᵈ, 4ᵗʰ and 5ᵗʰ instar) fed with detached plant l ...
... The large-scale commercial cultivation of genetically modified (GM) cotton has brought significant economic and environmental benefits. However, GM crops must undergo strict environmental monitoring and long-term observation. An important natural enemy insect in cotton fields, Geocoris pallidipennis, can ingest the Bt protein expressed in GM cotton by feeding on herbivorous insects that feed on th ...
... A laboratory experiment was conducted at the Department of Entomology, PJTSAU, Hyderabad on bionomics of pink boll worm Pectinophora gossypiella (Saunders) on cotton and other alternate hosts. Considerable variation in larval period on host plants was observed, with the shortest of 18.75± 1.40 days being when reared on okra fruits; and the maximum of24.90± 1.42 days being with Bt cotton. Generally ...
Qurban Ali Arain; Muhammad Farhanullah Khan; Habibullah Rana; Amjad Sultan; Zubair Ahmed; Hakim Ali Sahito; Muhammad Asif Farooq; Muhammad Faheem Akbar; Tasneem Kousar
... The research studies were conducted to determine the effects of Custard Apple (Annona squamosa L). (Seed extract) and transgenic cotton CEMB-33, BT-906 varieties against larval mortality, pupation, adult emergence, fecundity and fertility of Spodoptera litura Fab. The study was conducted under laboratory conditions 27.5 ± 5 °C and relative humidity 65 ± 5%, at (MAHQ) Biological Research Centre, Un ...
... Larvae of pink bollworm, Pectinophora gossypiella (Lepidoptera: Gelechiidae) were reared on four diets (two natural diets and two artificial diets) with varied nutritional value. Larval diet affects the survival, development duration, pupal weight, adult emergence and fecundity. PBW attained the fastest larval development on NRD (19.8 days) with a survival rate of 88.2% and slowest on NPD and okra ...
Tetranychus cinnabarinus; cotton; enzyme activity; fecundity; females; gossypol; metabolism; pests; plant protection; population dynamics; salt concentration; salt stress; secondary metabolites; spiders
Abstract:
... Cotton spider mites (Tetranychus cinnabarinus Boisduvals and T. truncatus Ehara) are important pest of Bt cotton. Abiotic stress, such as salt stress will not only affect the growth and development, but also cause secondary metabolism changes in cotton plants, which may further influence the occurrence of cotton spider mites on the stressed plants. The objective of the present study was to determi ...
Thomas P. Agyekum; John Arko-Mensah; Paul K. Botwe; Jonathan N. Hogarh; Ibrahim Issah; Duah Dwomoh; Maxwell K. Billah; Samuel K. Dadzie; Thomas G. Robins; Julius N. Fobil
Anopheles gambiae; blood meal; body size; climate; cotton; fecundity; gonotrophic cycle; guinea pigs; longevity; malaria; medical entomology; population dynamics; proboscis; sugars; temperature
Abstract:
... Higher temperatures expected in a future warmer climate could adversely affect the growth and development of mosquitoes. This study investigated the effects of elevated temperatures on longevity, gonotrophic cycle length, biting rate, fecundity, and body size of Anopheles gambiae (s.l.) (Diptera: Culicidae) mosquitoes. Anopheles gambiae (s.l.) eggs obtained from laboratory established colonies wer ...
... Pierce-sucking insects, such as plant bugs or stink bugs, cause damage in cotton fields worldwide. A novel genetically engineered (GE) cotton (Gossypium hirsutum) is protected against hemipteran pests and thrips by producing the modified Bacillus thuringiensis (Bt) mCry51Aa2 protein. Herbivores that consume insect-protected GE crops, and their natural enemies, can be exposed to plant-produced inse ...
... Thrips palmi, an important pest of vegetables and ornamentals, transmits several tospoviruses. Effect of tospovirus on host plant and vector is well studied. Little is known about the host-mediated alteration in biological traits of T. palmi. The present study reports the effect of different hosts viz. brinjal, cowpea, cotton, cucumber, sweet pepper, and tobacco on development, survival, fecundity ...
... Since the commercialization of herbicide-resistant (HR) crops, primarily glyphosate-resistant crops, their adoption has increased rapidly. Multiple herbicide resistance traits in crops such as canola (Brassica napus L.), corn (Zea mays L.), cotton (Gossypium hirsutum L.), and soybean [Glycine max (L.) Merr.] have become available in recent years, and management of their volunteers needs attention ...
... Results revealed that treating irradiated eggs of Corcyra chephalonica Stainton with hexane extract of cotton leaves and tomato leaves at 10000 ppm recorded maximum parasitism of 80.66 and 75.92% by T. chilonis, respectively whereas in control (Hexane) 40.66% parasitism was recorded. Maximum adult emergence (75.92%) was observed on hexane extract of tomato leaves followed by cotton leaves (72.67%) ...
... Exorista larvarum (L.) (Diptera: Tachinidae), a larval parasitoid of Lepidoptera, can be reared from egg to fecund adult on artificial media composed of crude components. The standard in vitro culture is performed in 24‐well plastic rearing plates. Exorista larvarum eggs, removed from superparasitized larvae of Galleria mellonella (L.) (Lepidoptera: Pyralidae), are individually placed in the wells ...
... Insect pests are a serious threat to agricultural productivity. Genetically-modified crops offer a promising alternative, and Bacillus thuringiensis endotoxin genes have played a major role in this respect. However, to overcome insect tolerance issues and to broaden the target range, it is critical to identify alternative insecticidal toxins working through novel mechanisms. In our previous study, ...
... In this study, we investigated the effect of leaf hairiness, based on non-glandular trichome density, of six cotton varieties (Gloria, Lima, Carla, DP-396, Edessa and ST-468) on the development, reproduction and population parameters of Tetranychus urticae (Acari: Tetranychidae) under controlled conditions. According to trichome densities (mean number/cm²) on the abaxial surface of cotton leaves: ...
... BACKGROUND: Dusky cotton bug, Oxycarenus hyalinipennis Costa (Hemiptera: Lygaeidae) is an important pest of cotton and causing economic losses to this crop. It also remains active round the year, infesting a number of host plants. Spirotetramat is a systemic insecticide and is effective against many sucking insect pests. A field collected population of O. hyalinipennis was reared in the laboratory ...
... BACKGROUND: Oxycarenus hyalinipennis (Costa) (Hemiptera: Lygaeidae) is a polyphagous insect pest. In Pakistan, O. hyalinipennis is managed by using different insecticides, a major concern for cotton producers, and has developed resistance to many of these. Sulfoxaflor belongs to a newly released sulfoximine family that has high efficacy for controlling sap‐feeding insect pests. RESULTS: A sulfoxaf ...
... The cotton aphid, Aphis gossypii Glover (Hemiptera: Aphididae), is an important insect pest of cotton crops worldwide. The objectives of this study were to determine the acute toxicity of afidopyropen and whether there are any effects of sublethal concentrations of afidopyropen on the biological characteristics of A. gossypii. The results showed that afidopyropen possesses high acute toxicity to a ...
... Cotton (Gossypium hirsutum) resistance to root-knot nematode (RKN) (Meloidogyne incognita) is controlled by quantitative trait loci (QTLs) on chromosomes 11 (CHR11) and 14 (CHR14). The individual contributions of these QTLs to resistance are not completely understood. We developed near isogenic lines susceptible at both loci (null), having CHR11 or CHR14 alone, and having both QTLs (CHR11/CHR14). ...
... The development of resistance in Bemisia tabaci (Gennadius) (Homoptera: Aleyrodidae) against a number of conventional and new chemistry insecticides has encouraged researchers to exploit some eco-friendly integrated pest management approaches to keep the pest population below their threshold levels. In the current laboratory trials, a free choice cotton leaf-disc assay was conducted to check the e ...
Gossypium hirsutum; Phenacoccus solenopsis; chemical control; cotton; crops; fecundity; females; integrated pest management; longevity; males; mating disruption; oviposition; pests; reproductive performance; reproductive success; sex pheromones; China; India; Pakistan
Abstract:
... Phenacoccus solenopsis is a devastating pest of cotton. It causes significance losses in cotton crops in China, India and Pakistan. Recently, chemical control is best tool for its management but delayed mating effects and pheromone-mediated disruption technique is still unknown. In this experiment, we study effects of male-only, female-only and both sexes delayed mating on mating success, reproduc ...
Spodoptera frugiperda; chemical control; chlorpyrifos; cholinesterase inhibitors; corn; cotton; entomology; fecundity; heterozygosity; insect resistance; larvae; life tables; pests; population growth; pupae; resistance management; soybeans; survival rate; Brazil
Abstract:
... Spodoptera frugiperda (J. E. Smith, 1797) is a polyphagous pest of global relevance due to the damage it inflicts on agricultural crops. In South American countries, this species is one of the principal pests of maize and cotton. Currently, S. frugiperda is also emerging as an important pest of soybeans and winter cereals in Brazil. Chemical control is one of the main control tactics against S. fr ...
Antilochus coquebertii; Dysdercus koenigii; biological control agents; body length; cotton; eggs; fecundity; females; instars; life tables; males; morphometry; progeny; Kansas
Abstract:
... Antilochus coquebertii is one of the most important predators of Dysdercus koenigii. The present study examines for the first time the fitness (using age-stage and two-sex life table parameters), morphometrics and predating potential of A. coquebertii fed on the second instar of D. koenigii under laboratory conditions. Results indicate that female adults of A. coquebertii consumed significantly hi ...
... Aphid performance is sensitive to temperature changes. Previous studies found that Acyrthosiphon gossypii (Mordviiko) was more sensitive to high temperature than Aphis gossypii (Glover). However, the effects of high temperatures on the survival, fecundity, and feeding behavior of these two aphid adults are not clear. This study examined the effect of different temperatures (29 °C, 32 °C, and 35 °C ...
... The dusky cotton bug, Oxycarenus hyalinipennis (Costa) (Hemiptera: Lygaeidae) is a serious pest of cotton and damages cotton seed by reducing the oil content. In Pakistan, O. hyalinipennis is managed by using various insecticides and has developed resistance to several insecticides. In this study, O. hyalinipennis was selected with bifenthrin for 12 generations (G₁ to G₁₂) and developed a 55.64-fo ...
Tetranychus; Ziziphus; apples; cotton; fecundity; fruits; host plants; intercropping; oviposition; pest management; pests; plant protection; population dynamics; spiders; survival rate; walnuts; China
Abstract:
... Intercropping is a common agricultural practice used to improve crop yields and profits; however, the intercrop species and its quality as a host for the main crop's key pests can affect the pests' population dynamics under intercropping conditions. Fruit trees - cotton intercropping systems are commonly applied in Xinjiang of China, and previous studies have confirmed that intercropping of cotton ...
... BACKGROUND: Genetically engineered (GE) crops that express insecticidal traits have improved the sustainability of insect pest management worldwide, but many important pest orders are not controlled by commercially available toxins. Development of the first transgenic thysanopteran‐ and hemipteran‐active Bacillus thuringiensis (Bt) Cry51Aa2.834_16 toxin expressed in MON 88702 cotton will significa ...
... Plant sap-sucking insects commonly have established mutualistic relationships with endosymbiotic bacteria that can provide nutrients lacking in their diet. Bemisia tabaci harbors one primary endosymbiont, Portiera aleyrodidarum, and up to seven secondary endosymbionts, including Hamiltonella defensa and Rickettsia sp. Portiera aleyrodidarum is already known to play a critical role in providing nec ...
... BACKGROUND: The leaf surface microstructure can greatly influence predator feeding behavior. However, its effects on predator oviposition preference, which is crucial for arthropod fitness at the population level, are largely unknown. This study aimed to test leaf discs and plants of five common host plant species of Bemisia tabaci, including Chinese kale, cotton, cucumber, eggplant, and sweetpota ...
... Apolygus lucorum is the dominant pathogenic insect attacking Bacillus thuringiensis (Bt) cotton in China. Additionally, 20‐hydroxyecdysone (20E) has important functions in many biological processes, including insect reproduction. Phospholipase C (PLC), which is an essential enzyme for phosphoinositide metabolism, is involved in 20E signal transduction, but its function in 20E‐mediated reproduction ...
Chinese cabbage; Spodoptera frugiperda; adults; agricultural management; cash crops; corn; cotton; fecundity; financial economics; food security; habitats; host plants; life tables; migratory behavior; pests; population growth; prediction; soybeans; tomatoes; wheat; China
Abstract:
... Spodoptera frugiperda is a significant migratory invasive pest, identified as a serious threat to agricultural production and food security in China. However, to our knowledge, the effects of most host plants on the biological characteristics of S. frugiperda have not been well studied. To develop effective management strategies for S. frugiperda in its new invasive habitat, basic biological and e ...
Yusuf Ali Abdulle; Talha Nazir; Samy Sayed; Samy F. Mahmoud; Muhammad Zeeshan Majeed; Hafiz Muhammad Usman Aslam; Zubair Iqbal; Muhammad Shahid Nisar; Azhar Uddin Keerio; Habib Ali; Dewen Qiu
... Whiteflies, Bemisia tabaci Gennadius (Aleyrodidae: Hemiptera), are a polyphagous economically destructive pest of several solanaceous crops around the world. Many secondary metabolites are synthesized by different biotrophic and necrotrophic fungi which are capable of inducing systemic resistance in plants against various phytophagous pests. The present laboratory work demonstrated the anti-insect ...
Lygus; acute exposure; cotton; crops; direct contact; fecundity; females; grasslands; imagos; insect pests; lambda-cyhalothrin; larval development; lethal dose 50; longevity; oviposition; population growth; sublethal effects; China
Abstract:
... The plant mirid bugs, Lygus pratensis Linnaeus and Polymerus cognatus Fieber, are key pests on economically important cotton crops and ecologically important grassland in northwestern China. Lambda-cyhalothrin is frequently used against mirid bugs in the regions. In this study, we examined the sublethal and transgenerational effects of short-term exposure to lambda-cyhalothrin on biological traits ...
... The red cotton bug, Dysdercus koenigii F. (Hemiptera: Pyrrhocoridae) is a destructive pest of cotton in the cotton belt region of Pakistan. This pest attacks the cotton bolls, mature cotton seeds and causes serious damage to premature bolls. A trial was conducted under laboratory conditions to check the predatory potential of A. coquebertii on different stages of D. koenigii. Four stages of D. koe ...
... We evaluated, in a laboratory experiment, the susceptibility of 10 tomato cultivars to the attack by the tomato red spider mite Tetranychus evansi, an invasive pest of this crop in Benin. Among the 10 cultivars tested, six were imported (i.e. Roma VF, Tima, Rio Grande, Buffalo, Petomech, and TLCV15) and four local (i.e. Akikon, Tounvi, TomL4, and Kèkèfo). Leaf disks (2.5 cm diameter) excised from ...
Helicoverpa armigera; chickpeas; corn; cotton; diapause; entomology; fecundity; host range; integrated pest management; migratory behavior; parasitoids; physical control; soybeans; tomatoes; Africa; Asia; Pacific Ocean Islands; South America; Southern European region
Abstract:
... Helicoverpa armigera Hübner (Lepidoptera: Noctuidae) is one of the most damaging insect pests globally, causing estimated global economic losses of over 3 billion US dollars annually. Crops most affected include cotton, tomato, soybean, grain crops such as corn and sorghum, chickpea and other pulses. Adults of this species possess strong migratory abilities (>2000 km), high fecundity and rapid rep ...
Commelina benghalensis; Lagenaria siceraria; Lema; adults; biological control agents; corn; cotton; eggplants; eggs; fecundity; females; laboratory experimentation; larvae; larval development; leaves; life history; life tables; mung beans; peanuts; pumpkins; rice; soybeans; turmeric; weeds
Abstract:
... We examined previous reports of Lema praeusta (Fab.) (Coleoptera: Chrysomelidae) as a minor pest of turmeric, eggplant, bottle gourd and pumpkin leaves, but no feeding damage by larvae and adults of L. praeusta were recorded by us on these leaves. We observed feeding by the larvae and adults of L. praeusta on ten species of Commelinaceae plants in no-choice tests. The biology, fecundity and life t ...
Gossypium; Verticillium dahliae; Verticillium wilt; cotton; crop production; disease control; fecundity; mixed infection; pathotypes; plant pathogenic fungi; soil fungi; spore germination; stems; surveys; vegetative growth; virulence; New South Wales
Abstract:
... Verticillium wilt (VW) is a major constraint to cotton production in Australia and worldwide. The disease is caused by a soilborne fungus, Verticillium dahliae, a highly virulent pathogen on cotton. Commonly, V. dahliae is designated into two pathotypes: defoliating (D) and non-defoliating (ND), based on induced symptoms. In the previous two survey seasons between 2017 and 2019, stems with suspect ...
... The ladybeetle Serangium japonicum has great potential to control the invasive pest Bemisia tabaci Gennadius Middle East‐Asia Minor 1 (MEAM1) in China. However, whether and how the host plant species of B. tabaci MEAM1 affect S. japonicum remains largely unexplored. The present study investigated the influence of five host plant species of B. tabaci MEAM1, namely tobacco, cucumber, cotton, tomato ...
... Red cotton bug Dysdercus koenigii F. (Hemiptera: Pyrrhocoridae), is found destructive pest in various cotton growing areas. Under natural conditions insects are highly subjected to thermal stresses. In present work the developmental duration and survival rate of all immature stages, adult longevity and reproduction of D. koenigii by exposed to rapid changes in very low temperatures were studied. W ...
Aphis gossypii; acetylcholinesterase; active sites; arthropod pests; catalytic activity; computer simulation; cotton; enzyme activity; essential oils; fecundity; insecticides; instars; life history; longevity; mechanism of action; progeny; sustainable agriculture; toxicity
Abstract:
... Safer alternatives to synthetic pesticides are essential for sustainable agriculture. Methyl benzoate (MB) is a volatile essential oil found in several plants. Recent reports of the toxicity of MB to arthropod pests suggest that MB may be a useful alternative insecticide. The present study assessed the effects of a sublethal concentration of MB (LC₃₀, 0.22%) on the life history and reproductive ch ...
Muhammad Hafeez; Sisi Liu; Saad Jan; Asim Gulzar; G. Mandela Fernández-Grandon; Muhammad Qasim; Khalid Ali Khan; Bahar Ali; Seifu Juneidi Kedir; Muhammad Fahad; Mo Wang
... The beet armyworm, Spodoptera exigua (Hübner) (Lepidoptera: Noctuidae) is a highly polyphagous pest which causes considerable economic losses to cotton and many vegetable crops. Tannins are among the most important secondary metabolites in cotton plants. We show that tannic acid enhances the toxic effect of chlorantraniliprole on S. exigua when presented in combination. Bioassays using third-insta ...
... Piercing/sucking insect pests in the order Hemiptera causes substantial crop losses by removing photoassimilates and transmitting viruses to their host plants. Cloning and heterologous expression of plant-derived insect resistance genes is a promising approach to control aphids and other sap-sucking insect pests. While expression from the constitutive 35S promoter provides broad protection, the ph ...
... BACKGROUND: In plant–insect interactions, phytotoxins such as gossypol, exert a defensive role on behalf of the plant by interfering with the essential metabolic, biochemical and physiological pathways of herbivorous insects. The beet armyworm, Spodoptera exigua (Hübner), is a key pest for many important crops including a range of vegetables, ornamentals, and cotton. In this study, we investigated ...
Miridae; Phaseolus vulgaris; Zea mays; adults; agroecosystems; corn; cotton; crops; diet; eggs; fecundity; females; foods; fruit trees; green beans; hatching; host plants; laboratory rearing; longevity; nymphs; pests; pods; population growth; seeds; survival rate; China
Abstract:
... The mirid bug Apolygus lucorum (Meyer-Dür) (Hemiptera: Miridae) is a major pest on cotton, fruit trees and other crops in China. A. lucorum adults often switch host plants in the agro-ecosystem, and such host-plant switching may promote more rapid population growth of A. lucorum. Here, we examined the population fitness of A. lucorum on different combinations of two plant foods [fresh maize kernel ...
... Agricultural landscapes are fast-changing systems due to crop planting and harvesting. These events strongly influence movements of arthropod pests and their natural enemies, yet they are insufficiently considered to implement informed pest management strategies. In China, the adoption of Bt-cotton crops at very large scales has given rise to the recent pest status of mirid bugs such as Apolygus l ...
... The nutritional status of host plants can have direct impacts on herbivore physiology and insect–plant interactions. We investigated the effect of micronutrients, including manganese, iron, zinc, and copper, on cucumber plant physiology, and on the biology and physiology of a strain of Aphis gossypii Glover selected over 12 generations to be resistant to pirimicarb. The micronutrient treatment inc ...
Nematoda; Sigmodon hispidus; analysis of covariance; body length; body weight; cotton; evolution; fecundity; immunomodulation; litter size; mammalogy; stomach; Georgia; Virginia
Abstract:
... We related presence and burden of stomach nematodes to body mass and reproductive allocation in hispid cotton rats (Sigmodon hispidus) from two long-running field studies in Virginia (1983–1984, n = 286; and 1988–1990, n = 425) and one from Georgia 1987–1989 (n = 459). Eighty percent of rats from the earlier Virginia sample were infected, with mean nematode mass of 1,311 mg. In the later samples, ...
... Our purpose is to determine whether extremely low concentrations of imidacloprid (2–8 ppb) typically found in field soil 1–3 yr after a crop is grown using seed with a standard imidacloprid seed-coating could impact the fitness of whiteflies, Bemisia tabaci Gennadius (Hemiptera: Aleyrodidae). Results of our experiments indicate that imidacloprid-resistant whitefly larvae feeding on cotton seedling ...
... A simple and inexpensive method that uses freshly excised green bolls (~10 d old) of cotton (Gossypium hirsutum L.) is developed for laboratory rearing of pink bollworm, Pectinophora gossypiella (Saunders). The adult females of pink bollworm preferred to lay eggs on the bracts and sometimes also on the rind of bolls, either singly or in a group of 2–3 eggs. The larvae fed and pupated within the bo ...
... The cotton mealybug, Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae), is an invasive pest of cotton, apart from several other important crops, and poses a serious threat to agricultural economy all over the world. Studies on the biology and population growth parameters of P. solenopsis on the five most preferred host plants, namely cotton (Gossypium hirsutum L.) (Malvaceae), China rose ...
... With the commercialization of transgenic cotton that expresses Bt (Bacillus thuringiensis) insecticidal proteins, mirid bugs have become key pests in cotton and maize fields in China. Genetically engineered (GE) crops for controlling mirids are unavailable owing to a lack of suitable insecticidal genes. In this study, we developed and validated a dietary exposure assay for screening insecticidal c ...
... BACKGROUND: Fall armyworm, Spodoptera frugiperda, is a major target pest of the Vip3A protein. The fitness of Bacillus thuringiensis (Bt)‐resistant insects on refuges is an important factor in determining the speed of resistance development. Fitness costs associated with Bt resistance can vary among host plants. Here, we provide the first experimental evaluation of the interactions between non‐Bt ...
... Evaluation of monocrotophos and Azadirachta indica oil, herein referred to as ‘Vijayneem’, were combined in ratios of 10% (10: 90), 20% (20: 80), 30% (30: 70), 40% (40: 60) and 50% (50: 50) [Monocrotophos: Vijayneem] under laboratory conditions to determine efficacy for properties of pesticidal, repellency, attraction, stimulant of consumption, development and reproduction. Asa biopesticide, Vijay ...
... BACKGROUND: Malaria is still a global health problem and vector control is the cornerstone of disease control strategies using indoor residual insecticide spraying (IRS) and insecticide-treated nets. The situation is becoming acute with widespread resistance to the limited arsenal of available insecticide classes. Therefore, new and innovative tools to reduce Plasmodium transmission are in need an ...
... Biological and morphological plasticity in polyphagous insect herbivores allow them to exploit diverse host plant species. Geographical differences in resource availability can lead to preferential host exploitation and result in inconsistent host specialization. Biological and molecular data provide insights into specialization and plasticity of such herbivore populations. In agricultural landsca ...
... The Bemisia tabaci whitefly was previously considered a single, highly polyphagous species, but is now accepted as a group of cryptic biological species. We investigated the host plant relations of two sister species, the “Mediterranean” (MED) composed of the Q1 and Q2 mitochondrial groups and the “ASL” species (formerly considered a MED group), to discover whether polyphagy was related to the glo ...
... Helicoverpa armigera Hubner is an important polyphagous agricultural insect pest, highly mobile, with a worldwide distribution. In India, it causes substantial losses to cotton, legumes, cereal and vegetable crops. Malaria is caused by parasites from the genus Plasmodium that are transmitted by female anopheline mosquitoes. Anopheles stephensi Liston is the leading vector of malaria in India, part ...
... Spotted bollworm, Earias vittella, is one of the most serious and devastating insect pests of vegetables and cotton. Currently, insecticides are necessary for its control in nearly all crop systems. In this paper, we evaluate the sub-lethal effects of lufenuron on biological traits and activity of detoxification enzymes: cytochrome P450 monooxygenases, esterase, and glutathione S-transeferase (GST ...
... Immature stages of the boll weevil, Anthonomus grandis grandis Boh. (Coleoptera: Curculionidae), develop protected inside cotton fruiting structures. Therefore, the adult beetles have become the main target of insecticide applications. The use of insect growth regulators (IGRs) is recommended against immatures, even though they may also affect the survival and reproductive traits of adult insects. ...
... Aphids are considered as one of the key pests for wheat production worldwide. Major aphid species that infest wheat in China include Sitobion avenae, Rhopalosiphum padi, Schizaphis graminum and Metopolophium dirhodum. However, during our wheat field survey in Wenshang County of Shangdong Province, China, we observed that Aphis gossypii can feed on wheat. The damage risk of A. gossypii on wheat was ...
... Apolygus lucorum is the predominant pest of Bacillus thuringiensis (Bt) cotton in China. 20‐hydroxyecdysone (20E) plays a key role in the reproduction of this insect. To better understand the mechanism underlying 20E‐regulated reproduction, the nuclear hormone receptor E75 isoform‐A of Ap. lucorum (Al‐E75A) was cloned and its expression analysed. A 2241‐bp sequence of Al‐E75A cDNA encoded an open ...
... In 2013, the presence of Helicoverpa armigera (Hübner) was reported in cotton, soybean, corn and weeds in diverse regions of Brazil. We studied the biology and the fertility life table of this pest when reared on cotton (293 cv. CNPA RF), soybean (cv. Brasmax Power), corn (cv. BRS 1010), wheat (cv. BR 18) and on an artificial diet. Caterpillars were reared using the vegetative and reproductive str ...
... This study aimed to evaluate the biotic potential and life table of individuals of Helicoverpa armigera (Hübner) from different host plants (citrus, corn, and cotton) and Brazilian states (São Paulo, Distrito Federal, and Bahia) in artificial diet, under laboratory conditions (25 ± 1°C, 70 ± 10% RH, 14 h photophase). The longevity, pre-, post- and oviposition periods, fecundity, and fertility of 1 ...
... The cotton bollworm Helicoverpa armigera is a destructive pest that affects a variety of crop plants. Because of its polyphagous feeding habit, mobility as adults, and high fecundity, the expanding infestations of H. armigera in different crops have caused economic losses and difficulties for pest population management. In Brazil, a sequence of different crop systems in the same area and crop rota ...
... Spodoptera exigua (Hübner) is a polyphagous pest that shifts its population to different hosts during its life cycle to receive nutritive advantages. Therefore, demographic evaluation of alternate hosts is important for effective pest management. Here, we have evaluated castor (Ricinus communis L.), cauliflower (Brassica oleracea L.), cotton (Gossypium hirsutum L.), okra (Abelmoschus esculentus L. ...
... The infection of Upland cotton (Gossypium hirsutum L.) by the root parasite Rotylenchulus reniformis Linford & Oliveira, the reniform nematode, results in massive annual yield losses throughout the southeastern United States and portions of Texas. Resistance to reniform nematode was identified in the photoperiodic G. barbadense L. accession GB713. Previous research identified three quantitative tr ...
Aphis gossypii; adults; cotton; crops; dipping; fecundity; feeding behavior; ingestion; integrated pest management; lethal concentration 50; longevity; neonicotinoid insecticides; pests; phloem; population growth; progeny; sublethal effects; China
Abstract:
... Aphis gossypii Glover (Hemiptera: Aphididae) is a key pest in cotton crops, notably owing to its increasing resistance to commonly used pesticides. Such resistance prompts for the development of integrated pest management (IPM) programs that include novel pesticides being effective against the aphid. In the present study, we assessed lethal and sublethal effects of cycloxaprid, a novel chiral neon ...
Aphis gossypii; Dysdercus cingulatus; Helicoverpa armigera; Phenacoccus solenopsis; Rhynocoris fuscipes; adults; agroecosystems; biological control; cages; cotton; crop yield; fecundity; leaves; longevity; mass rearing; natural enemies; pest management; pests; predators; India
Abstract:
... BACKGROUND: Rhynocoris fuscipes (Fab.) (Hemiptera: Reduviidae) is a generalist predator of cotton pests and is commonly found inhabiting cotton‐growing regions in southern India. With the goal of integrating this predator in standard management practices used against cotton pests on a commercial scale, (1) we developed a protocol for adult group rearing of this predator inside micro‐environmental ...
Aenasius; Phenacoccus solenopsis; adults; biological control; cotton; endoparasitoids; fecundity; females; instars; longevity; males; mass rearing; monsoon season; nymphs; parasitism; progeny; relative humidity; sex ratio; temperature
Abstract:
... Aenasius arizonensis (Girault) (Hymenoptera: Encyrtidae) is an important solitary endoparasitoid of mealybug, Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae). Studies on seasonal and biological interactions between host and parasitoid are important to optimize the mass production and field release of high-quality females. We investigated the influence of different crop seasons viz., pre ...
... Cotton plants accumulate phytotoxins, such as gossypol and related sesquiterpene aldehydes, to resist insect herbivores. The survival of insects exposed to toxic secondary metabolites depends on the detoxification metabolism mediated by limited groups of cytochrome P450. Gossypol has an antibiotic effect on Aphis gossypii, and as the concentrations of gossypol were increased in the present study, ...
... The leaf structure of the host plant can affect the development and reproduction of the predatory enemies of spider mites. The objective of this study was to compare the effects of five host plant species [cucumber (Cucumis sativus L.), cotton (Gossypium hirsutum L.), eggplant (Solanum melongena L.), tomato (Lycopersicon esculentum Mill.) and green bean (Phaseolus vulgaris L.)] on the development ...
... Spirotetramat is a novel tetramic acid-based insecticide, belonging to keto-enol pesticide family, with a novel mode of action; it interferes with lipid biosynthesis. Its insecticide activity against various agricultural pest insects have been demonstrated (e.g. on Myzus persicae, Bemisia tabaci and Tetranychus urticae). However, information available is currently limited on the efficacy of spirot ...
... Effect of elevated CO₂ on feeding behavior of the cotton aphid, Aphis gossypii (Glover) (Hemiptera: Aphididae), was investigated using electrical penetration graphs (EPG) on cotton, Gossypium hirsutum L. (Malvaceae). Leaf microstructures and foliar soluble constituents were also measured simultaneously to quantify the impact of foliar changes on leaf nutritional quantity and quality, owing to elev ...
... Apolygus lucorum (Heteroptera: Miridae), an important herbivore feeding on a broad range of cultivated and wild plants, always shows a strong preference for flowering host plants. In a prior study, we found A. lucorum fecundity to be higher on flowering plants than on plants still at the vegetative stage. This led us to hypothesize that ovarian development and vitellogenin (Vg) expression in A. lu ...
Bacillus thuringiensis; Glebionis coronaria; cotton; eggs; faba beans; fecundity; female fertility; females; genes; hatching; hosts; linear models; longevity; mortality; nutrients; nymphs; pest management; pests; protein synthesis; rearing; transcription (genetics); transgenic plants; translation (genetics); vitellogenin; China
Abstract:
... BACKGROUND: The polyphagous pest Apolygus lucorum is now the dominant pest of Bacillus thuringiensis (Bt) cotton in China. In this study, the transcriptional and translational profiles of AlVg influenced by different hosts were identified, and then the correlations between AlVg gene or AlVg protein expression and key population proliferation parameters of A. lucorum were further clarified. RESULTS ...
... Mutualistic plant–endophyte symbioses can benefit plants by increasing host fitness through reductions in herbivory. The fungus, Chaetomium globosum strain TAMU 520, was previously isolated as an endophyte from cotton (Gossypium hirsutum) and can be re-inoculated to systemically colonize cotton plants via seed treatment. We evaluated the potential impacts of the endophyte in cotton on plant parasi ...
... Crops producing insecticidal crystal (Cry) proteins from the bacterium, Bacillus thuringiensis (Bt), are an important tool for managing lepidopteran pests on cotton and maize. However, the effects of these Bt crops on non-target organisms, especially natural enemies that provide biological control services, are required to be addressed in an environmental risk assessment. Amblyseius andersoni (Aca ...
... Biological activity of the bacterium Bacillus thuringiensis Berliner (Bt) against insect pests is influenced by the host plants. To understand the underlying mechanism of variation in biological activity of Bt on host plants, we studied the effect of chemicals from the surface of chickpea (Cicer arietinum L., Fabaceae) leaves (ICCC 37 and ICC 506EB), sorghum [Sorghum bicolor (L.) Moench, Poaceae] ...
... Cotton‐ and maize‐producing insecticidal crystal (Cry) proteins from the bacterium, Bacillus thuringiensis (Bt), have been commercialized since 1996. Bt plants are subjected to environmental risk assessments for non‐target organisms, including natural enemies that suppress pest populations. Here, we used Cry1F‐resistant Spodoptera frugiperda (J.E. Smith) and Cry1Ac and Cry2Ab‐resistant Trichoplusi ...
... The minute two-spotted ladybeetle, Diomus notescens Blackburn is a common predator of aphids and other pests in Australian agricultural crops, however little is known about the biology of D. notescens. The aim of this study was to provide information on the life cycle of this predator and improve our understanding of its biological control potential, particularly against one of the major pests of ...
... Athetis lepigone (Möschler) is a new insect pest that feeds on corn seedlings in summer corn region of China. It is an omnivorous insect, which not only infests corn, soya bean, peanut and other crops, but also feeds on fallen and decaying leaves of some crops and weeds. Effects of host plants, corn, cotton, peanut, wheat and soya bean, on larval and pupal development and survival, and the fecundi ...
... Apolygus lucorum (Meyer-Dür) (Hemiptera: Heteroptera: Miridae) is an important insect pest of cotton and other crops, but the species also feeds on some insect pests. In this study, the effect of 5 food condition treatments, including corn kernel, cotton leaves, eggs of Helicoverpa armigera Hübner (Lepidoptera: Noctuidae), a combination of corn + H. armigera eggs, and of cotton leaves + H. armiger ...
... Culicoides peregrinus (Kieffer) (Diptera: Ceratopogonidae) was reared from egg to adult using four different combinations of food and substrate (T1: absorbent cotton, mud broth with 2% yeast; T2: 1% agar, mud broth with 2% yeast; T3: absorbent cotton, nutrient broth; T4: absorbent cotton, 2% yeast). Field‐collected engorged females exhibited mean fecundity of 82.45 ± 4.00. The highest rate of emer ...
... Studies on biology of cotton whitefly, Bemisia tabaci were carried out under screen house conditions on cotton (variety H-1117 and hybrid RCH 134 BG II). Whitefly exhibited three nymphal instars and a pupal stage before reaching the adult stage. The fecundity varied from 34–49 and 45–69 eggs per female on cotton variety and cotton hybrid, respectively. Total life cycle from egg to adult was varied ...
... The tarnished plant bug, Lygus lineolaris (Palisot de Beauvois) (Hemiptera: Miridae), is a major pest of cotton (Gossypium hirsutum L.) in the state of Mississippi. Economic data indicate that L. lineolaris is a more serious pest of cotton in the Delta region of Mississippi than in the Hills region; however, little data exist comparing the two populations. Two experiments were undertaken to compar ...
... BACKGROUND: Acetamiprid is a neonicotinoid insecticide that is effective against both soil and plant insects, including insects of the orders Lepidoptera, Coleoptera, Homoptera and Thysanoptera. In order to estimate the effects associated with insecticide exposure and devise better pest management tactics, a field population of Phenacoccus solenopsis was exposed to acetamiprid in the laboratory. S ...
... Plants can have detrimental effects on biological control agents by affecting their prey or host quality. Thus, it is important to understand the tri-trophic interactions between plants, herbivores and natural enemies when implementing biological control programmes. Studies have shown that both morphological and chemical traits of host plants can affect the third trophic level. Cotton plants are k ...
... BACKGROUND: Bemisia tabaci is a cryptic species complex. In Pakistan, members of the complex, MEAM1 and AsiaII 1, are the predominant species infesting cotton. The biology of the two on cotton, collard, cucumber and tomato was studied. RESULTS: In all cases there were significant interactions between species and host. MEAM1 developmental periods did not differ significantly across hosts, whereas A ...
... KEY MESSAGE: Transgene-based analysis of the MIC-3 gene provides the first report of a cotton gene having a direct role in mediating cotton resistance to root-knot nematode. Major quantitative trait loci have been mapped to Upland cotton (Gossypium hirsutum L.) chromosomes 11 and 14 that govern the highly resistant phenotype in response to infection by root-knot nematode (RKN; Meloidogyne incognit ...
Bemisia tabaci; Rickettsia; cages; cotton; eggs; endosymbionts; fecundity; hosts; inheritance (genetics); insects; laboratory experimentation; pests; population growth; sex ratio; Arizona
Abstract:
... Inherited intracellular insect endosymbionts may manipulate host reproduction or provide fitness benefits to their hosts in ways that result in their rapid spread throughout a host population. Fitness benefits in particular can result in the increased pest potential of agriculturally important insects. While benefits due to endosymbiont infection have been well studied in laboratory assays, very l ...
... Geocoris punctipes (Say) and Orius insidiosus (Say) are generalist predators found in a wide range of crops, including cotton (Gossypium hirsutum L.) and maize (Zea mays L.), where they provide important biological control services by feeding on an array of pests, including eggs and small larvae of caterpillars. A high percentage of cotton and maize in the United States and several other countries ...
Jun-Ce Tian; Xiang-Ping Wang; Li-Ping Long; Jörg Romeis; Steven E. Naranjo; Richard L. Hellmich; Ping Wang; Elizabeth D. Earle; Anthony M. Shelton; Juan Luis Jurat-Fuentes
... The biological control function provided by natural enemies is regarded as a protection goal that should not be harmed by the application of any new pest management tool. Plants producing Cry proteins from the bacterium, Bacillus thuringiensis (Bt), have become a major tactic for controlling pest Lepidoptera on cotton and maize and risk assessment studies are needed to ensure they do not harm impo ...
... The neotropical brown stink bug, Euschistus heros (F.), is a phytophagous pentatomid that causes considerable economic losses in soybean crop, but it has been recently reported using cotton as a new host plant. Nymphs and adults of E. heros were raised on six different food sources composed of the reproductive structures of cotton and soybean plants: a standard diet (green-bean pods + raw peanuts ...
... The striped mealybug, Ferrisia virgata (Cockerell) (Hemiptera: Pseudococcidae), is a cosmopolitan pest of a variety of agricultural crops including cotton. To investigate the biological control potential of the predatory ladybird Cryptolaemus montrouzieri Mulsant (Coleoptera: Coccinellidae) against this pest, we evaluated its developmental and reproductive fitness when feeding on F. virgata reared ...
... Laboratory studies were conducted to investigate tritrophic transfer of insecticidal Cry proteins from transgenic cotton to an herbivore and its predator, and to examine effects of these proteins on the predator's development, survival, and reproduction. Cry1Ac and Cry2Ab proteins from the bacterium Bacillus thuringiensis (Bt) produced in Bollgard-II (BG-II, Event 15985) cotton plants were acquire ...