Temporal and Spatial Patterns of Allelic Frequencies in Cotton Bollworm (Lepidoptera: Noctuidae)
نویسندگان
چکیده
منابع مشابه
Experience-based mediation of feeding and oviposition behaviors in the cotton bollworm: Helicoverpa armigera (Lepidoptera: Noctuidae)
Experience is well known to affect sensory-guided behaviors in many herbivorous insects. Here, we investigated the effects of natural feeding experiences of Helicoverpa armigera larvae on subsequent preferences of larval approaching and feeding, as well as the effect of host-contacting experiences of mated females on subsequent ovipositional preference. The results show that the extent of exper...
متن کاملBollworm (Lepidoptera: Noctuidae) survival on 'Bollgard' and 'Bollgard II' cotton flower bud and flower components.
Genetically modified cotton, Gossypium hirsutum L., cultivars ('Bollgard') that produce crystalline proteins from Bacillus thuringiensis (Berliner) are valuable tools for managing lepidopteran insect pests in the United States. However, high numbers of bollworm, Helicoverpa zea (Boddie), larvae have been observed feeding in white flowers of these cultivars. Fresh tissue bioassays were conducted...
متن کاملGene-flow between populations of cotton bollworm Helicoverpa armigera (Lepidoptera: Noctuidae) is highly variable between years.
Both large and small scale migrations of Helicoverpa armigera Hübner in Australia were investigated using AMOVA analysis and genetic assignment tests. Five microsatellite loci were screened across 3142 individuals from 16 localities in eight major cotton and grain growing regions within Australia, over a 38-month period (November 1999 to January 2003). From November 1999 to March 2001 relativel...
متن کاملIdentification and characterization of hydrolytic enzymes from the midgut of the cotton bollworm, Helicoverpa armigera Hübner (Lepidoptera: Noctuidae)
Midgut hydrolytic enzymes of Helicoverpa armigera Hübner (Lepidoptera: Noctuidae) were identified and partially characterized. Km, Vmax, optimum pH, and specific activity were determined for proteolytic enzymes and αamylases. All hydrolytic enzyme activity had an optimum pH value in the alkaline pH range. We observed major serine protease activity, together with minor cysteine-like activity, th...
متن کاملCytochrome P450 Monooxygenases in the Cotton Bollworm, Helicoverpa armigera (Lepidoptera: Noctuidae): In Vivo Effects of Deltamethrin Exposure
The in vivo effects of deltamethrin on Helicoverpa armigera cytochrome 450s were investigated by the measurements of cytochrome P450 content and two enzymatic activities. Deltamethrin showed dose-, tissue-, and exposure way-specific effects on cytochrome P450 monooxygenases, ranging from induction to repression. Topical deltamethrin (0.1 and 1.0 g insect) significantly decreased cytochrome P450...
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ژورنال
عنوان ژورنال: Environmental Entomology
سال: 2002
ISSN: 0046-225X,1938-2936
DOI: 10.1603/0046-225x-31.3.462