PUPAL DEVELOPMENT RATE OF HELIOTHIS ARMIGER (HUBNER) (LEPIDOPTERA: NOCTUIDAE) UNDER CONSTANT AND ALTERNATING TEMPERATURES.
نویسندگان
چکیده
منابع مشابه
Plant host effect on the development of Heliothis virescens F. (Lepidoptera: Noctuidae).
Heliothis virescens F. is an important polyphagous pest that can develop on >100 plant species, including 20 economic crops. Populations of this insect are believed to be locally maintained on a few crops and weed hosts in Washington County, MS. To find the intrinsic value of these plants for the development of H. virescens populations, we fed different laboratory and wild colonies with fresh a...
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The development of pest resistance to transgenic crop plants producing insecticidal toxins from Bacillus thuringiensis Berliner (Bt) poses a major threat to their sustainable use in agriculture. "Pyramiding" two toxins with different modes of actions in the same plant is now being used to delay the evolution of resistance in the insects, but this strategy could fail if a single gene in a pest c...
متن کاملAnalysis of midgut proteinases from Bacillus thuringiensis-susceptible and -resistant Heliothis virescens (Lepidoptera: Noctuidae).
Insects with altered proteinases can avoid intoxication by Bacillus thuringiensis (Bt) toxins. Therefore, proteinase activities from gut extracts of Bt-susceptible (YDK) and -resistant (YHD2-B, CXC and KCBhyb) Heliothis virescens strains were compared. The overall pH of gut extracts from YDK and CXC were statistically similar (9.56 and 9.62, respectively), while the pH of extracts from KCBhyb a...
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Hexane, chloroform and ethyl acetate crude extracts of Atalantia monophylla leaf were studied for ovicidal activity against Helicoverpa armigera at 0.5. 1.0, 2.5 and 5.0% concentrations. The ovicidal activity of 67.10% was statistically significant noticed in hexane extract at 5.0% concentration. The least LC50 value of 2.60% was observed in hexane extract with significant Chi-square value at P...
متن کاملARTHROPOD BIOLOGY Size and Chemical Composition of Heliothis virescens (Lepidoptera: Noctuidae) Spermatophores
The tobacco budworm, Heliothis virescens (F.) (Lepidoptera: Noctuidae), is a polyandrous species of economic importance on the American continent. This sexual behavior allows for the presence of multiple spermatophores inside a female and the possibility of different males fertilizing the femaleÕs offspring, which can make insecticide resistance management or sterile insect release programs par...
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ژورنال
عنوان ژورنال: Australian Journal of Entomology
سال: 1981
ISSN: 1326-6756,1440-6055
DOI: 10.1111/j.1440-6055.1981.tb00993.x