Different Cotton Strains Screened for Resistance to Heliothis Spp. (Lepidoptera: Noctuidae) in the Field
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چکیده
منابع مشابه
Resistance allele frequency to bt cotton in field populations of helicoverpa armigera (Lepidoptera: Noctuidae) in China.
Resistance evolution in target insects to Bacillus thurningiensis (Bt) cotton, Gossypium hirsutum L., is a main threat to Bt cotton technology. An increasing trend of population density of Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) has been observed since 2001 in Qiuxian County (Hebei, China), where Bt cotton has been planted dominantly since 1998. This region was selected in 2006 a...
متن کاملGenetic basis of resistance to Cry1Ac and Cry2Aa in Heliothis virescens (Lepidoptera: Noctuidae).
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 کاملResponse of Heliothis virescens (Lepidoptera: Noctuidae) strains to Bacillus thuringiensis Cry1Ac incorporated into different insect artificial diets.
Susceptibility to the Cry1Ac toxin from Bacillus thuringiensis in tobacco budworm, Heliothis virescens (F.) (Lepidoptera: Noctuidae), is usually measured by performing bioassays under laboratory conditions. Accurate comparison of Cry1Ac susceptibility among H. virescens samples conducted in different places is challenged by several important methodological aspects, especially if different insec...
متن کاملTrapping Mocis Spp. (lepidoptera: Noctuidae) Adults with Different Attractants
Experiments conducted in a pasture agroecosystem in central Florida showed that two-component lures composed of acetic acid and 3-methyl-1-butanol placed in Unitraps collected adults of three species of grass looper. Mocis disseverans (Walker), M. latipes (Guenée), and M. marcida (Guenée) males and females were collected from July through November, with peaks from late September through late Oc...
متن کاملUsing stable isotope analysis to examine fall armyworm (Lepidoptera: Noctuidae) host strains in a cotton habitat.
Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae), or fall armyworm, is an important agricultural pest of several crops in the Western Hemisphere, including cotton (Gossypium L.). Two morphologically identical host strains of fall armyworm exist that differ in plant host use and habitat distribution. The corn-strain is a primary pest of corn, Zea mays L., whereas the rice-strain is th...
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ژورنال
عنوان ژورنال: Pakistan Journal of Biological Sciences
سال: 2000
ISSN: 1028-8880
DOI: 10.3923/pjbs.2000.1290.1291