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2020•International Journal of Current Microbiology and Applied SciencesOpen access

Evaluation of Native Isolates of Bacillus thuringiensis against the Cotton Bollworm, Helicoverpa armigera (Hübner)

Pettem Swathi, S. Ramesh Babu, Devendra Jain, MK Mahla, Deepika Kalyan, Pramod Rokadia, Poonam Yadav

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Abstract

A total of twenty-eight native Bacillus thuringiensis strains were evaluated against neonate larvae of Helicoverpa armigera and found that three strains were effective with more than 80 % cumulative mortality, followed by seven strains with 51-75 and nine strains with more than 40% cumulative mortality at 7 days after treatment. Cumulative mortality of 83.3% was recorded in strain IBS1 which was statistically on par with each other and standard check Bt. kurstaki (HD-1) and also superior over other treatments. IBS5 and IBS14 also recorded higher cumulative mortality of neonate larvae of Helicoverpa armigera.

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A total of twenty-eight native Bacillus thuringiensis strains were evaluated against neonate larvae of Helicoverpa armigera and found that three strains were effective with more than 80 % cumulative mortality, followed by seven strains with 51-75 and nine strains with more than 40% cumulative mortality at 7 days after treatment. Cumulative mortality of 83.3% was recorded in strain IBS1 which was statistically on par with each other and standard check Bt. kurstaki (HD-1) and also superior over other treatments. IBS5 and IBS14 also recorded higher cumulative mortality of neonate larvae of Helicoverpa armigera.

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Available abstract

A total of twenty-eight native Bacillus thuringiensis strains were evaluated against neonate larvae of Helicoverpa armigera and found that three strains were effective with more than 80 % cumulative mortality, followed by seven strains with 51-75 and nine strains with more than 40% cumulative mortality at 7 days after treatment. Cumulative mortality of 83.3% was recorded in strain IBS1 which was statistically on par with each other and standard check Bt. kurstaki (HD-1) and also superior over other treatments. IBS5 and IBS14 also recorded higher cumulative mortality of neonate larvae of Helicoverpa armigera.

Key concepts: Helicoverpa armigera, Bacillus thuringiensis, Bollworm, Larva, Biology, Helicoverpa, Veterinary medicine, Toxicology

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Evaluation of Native Isolates of Bacillus thuringiensis against the Cotton Bollworm, Helicoverpa armigera (Hübner) — Research Paper | ScholarLens