Toxicity of Bacillus Thuringiens1S Products Against Budworm and Bollworm in Cotton, 1991
نویسندگان
چکیده
منابع مشابه
comparative study of pain relieving effect of dry cotton pellet and eugenol cotton pellet in the reduction of pain in emergoney pulpotomy
چکیده ندارد.
15 صفحه اولResistance to Bacillus thuringiensis toxin Cry2Ab and survival on single‐toxin and pyramided cotton in cotton bollworm from China
Evolution of Helicoverpa armigera resistance to Bacillus thuringiensis (Bt) cotton producing Cry1Ac is progressing in northern China, and replacement of Cry1Ac cotton by pyramided Bt cotton has been considered to counter such resistance. Here, we investigated four of the eight conditions underlying success of the refuge strategy for delaying resistance to Cry1Ac+Cry2Ab cotton, a pyramid that ha...
متن کاملAcute, Sublethal, and Combination Effects of Azadirachtin and Bacillus thuringiensis on the Cotton Bollworm, Helicoverpa armigera
The cotton bollworm, Helicoverpa armigera Hübner (Lepidoptera: Noctuidae) is a polyphagous and cosmopolitan insect pest that causes damage to various plants. In this study, the lethal and sublethal effects of azadirachtin and Bacillus thuringiensis Berliner sub sp . kurstaki (Bacillales: Bacillaceae) were evaluated on third instar H. armigera under laboratory conditions. The LC50 values of azad...
متن کاملProduction and characterization of Bacillus thuringiensis Cry1Ac-resistant cotton bollworm Helicoverpa zea (Boddie).
Laboratory-selected Bacillus thuringiensis-resistant colonies are important tools for elucidating B. thuringiensis resistance mechanisms. However, cotton bollworm, Helicoverpa zea, a target pest of transgenic corn and cotton expressing B. thuringiensis Cry1Ac (Bt corn and cotton), has proven difficult to select for stable resistance. Two populations of H. zea (AR and MR), resistant to the B. th...
متن کاملSelective feeding of tobacco budworm and bollworm (Lepidoptera: Noctuidae) on meridic diet with different concentrations of Bacillus thuringiensis proteins.
Laboratory experiments were conducted to evaluate the behavior of bollworm, Helicoverpa zea (Boddie), and tobacco budworm, Heliothis virescens (F.), larvae on meridic diet with different concentrations of the Cry1Ac and Cry2Ab proteins from Bacillus thuringiensis subsp. kurstaki Berliner. The proteins used in these experiments are the ones in commercially available Bollgard and Bollgard II cott...
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ژورنال
عنوان ژورنال: Arthropod Management Tests
سال: 1994
ISSN: 2155-9856
DOI: 10.1093/amt/19.1.235