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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 ...