آسیب شناسی بافتهای روده میانی لاوهای ( Ostrinia nubilalis persica Mutuura & Munroe 1970 (Lep.: Pyralidae:Pyrautinae تغذیه کرده از اسپوروتوکسین باکتری Bacillus thuringiensis واریته Kurstaki

histopathology of midgut of european corn borer( ostrinia nubilalis persica mutuura & munroe 1970) (lep.: pyralidae:pyrautinae) larvae treated with bacillus thuringiensis var . kurstaki

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بررسی اثر Bacillus thuringiensis Ber . روی لاروهای (Ostrinia nubilalis Hud .( Lep.: Pyralidae

Comparative analysis of proteinase activities of Bacillus thuringiensis-resistant and -susceptible Ostrinia nubilalis (Lepidoptera: Crambidae).

Proteinase activities were compared in soluble and membrane fractions of guts obtained from larvae of Bacillus thuringiensis-resistant and -susceptible Ostrinia nubilalis. Overall, serine proteinases from soluble fractions of the susceptible strain were more active than those of the resistant strain. The soluble trypsin-like proteinase activity of the resistant strain was approximately half tha...

Susceptibility of dipel-resistant and -susceptible Ostrinia nubilalis (Lepidoptera: Crambidae) to individual Bacillus thuringiensis protoxins.

Dipel-resistant and -susceptible strains of Ostrinia nubilalis (Hübner) were evaluated for larval mortality and growth inhibition when fed diets containing individual Bacillus thuringiensis protoxins. Resistance ratios for four of the protoxins in Dipel (Cry1Aa, Cry1Ab, Cry1Ac, and Cry2Aa) were 170-, 205-, 524-, and > 640-fold, respectively, considerably higher than the 47-fold resistance to Di...

DiPel-selected Ostrinia nubilalis larvae are not resistant to transgenic corn expressing Bacillus thuringiensis Cry1Ab.

The survival of KS-SC DiPel-resistant and -susceptible European corn borer, Ostrinia nubilalis (Hübner), was evaluated on different tissues from corn, Zea mays L., hybrids, including a nontransgenic and two transgenic corn plants (events MON810 and Bt11) expressing high doses of Bacillus thuringiensis (Bt) Cry1Ab. The survival of Bt-resistant and -susceptible third instars was similar after a 5...

Cross-resistance of Cry1Ab-selected Ostrinia nubilalis (Lepidoptera: Crambidae) to Bacillus thuringiensis delta-endotoxins.

Corn plants expressing the toxin from Bacillus thuringiensis (Berliner) have proven to be effective in controlling lepidopteran pests such as the European corn borer, Ostrinia nubilalis (Hübner) (Lepidoptera: Crambidae). Several Bt toxins are being tested and incorporated into crop genomes, although tests for cross-resistance among different toxins have been limited by a lack of resistant colon...