Cross-resistance of pink bollworm (Pectinophora gossypiella) to Bacillus thuringiensis toxins

Article Abstract:

Results point out that the resistance and cross-resistance of pink bullworm possessing bacterial toxin CryAc to activated Cry1Ab toxins is due to the binding of the toxin to midgut target sites.

Netherlands, Analysis, Physiological aspects, Bacterial toxins, Binding sites (Biochemistry), Active sites (Biochemistry), Insecticide resistance

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Cyt1A from Bacillus thuringiensis lacks toxicity to susceptible and resistant larvae of diamondback moth (Plutella xylostella) and pink bollworm (Pectinophora gossypiella)

Article Abstract:

Research indicates that the endotoxin Cyt1Aa, derived from Bacillus thuringiensis, was not sufficiently toxic to the larvae of the insect pests diamond-back moth or pink bollworm, whether by itself or used with Cry toxins. This result is unlike the findings obtained using beetle and mosquito larvae, in which Cyt1Aa was successfully toxic.

United States, Health aspects, Endotoxins, Control, Corn earworm, Diamond-back moth, Pink bollworm, Diamondback moths

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Cross-resistance and stability of resistance to Bacillus thuringiensis toxin Cry1C in diamondback moth

Article Abstract:

There is very little cross-resistance in the diamondback moth to the different insecticidal crystal proteins of Bacillus thuringiensis. Therefore, different Cry proteins could be used in rotation and in different combinations to prevent the moth from becoming resistant to them. The Cry9Ca protein is more potent than some other Cry proteins and may be especially useful.

Evaluation, Microbial insecticides

Similar abstracts:

• Abstracts: Cyt1Aa from Bacillus thuringiensis subsp. israelensis is toxic to the diamondback moth, Plutella xylostella, and synergizes the activity of Cry1Ac towards a resistant strain
• Abstracts: Comparison of toxinotyping and PCR ribotyping of Clostridium difficile strains and description of novel toxinotypes
• Abstracts: Dual resistance to Bacillus thuringiensis Cry1Ac and Cry2Aa toxins in Heliothis virescens suggests multiple mechanisms of resistance
• Abstracts: Relative distribution and conservation of genes encoding aminoglycoside-modifying enzymes in Salmonella enterica serotype Typhimurium phage type DT104

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