Bioactivity of Bacillus thuringiensis against the american bollworm, Helicoverpa armigera (hubner)
2000
Gujar, G.T. | Kalia, Vinay | Kumari, Archana (Indian Agricultural Research Institute, New Delhi (India). Div. of Entomology)
Effect of Bacillus thuringiensis (B.t.) formulations/strains on the growth and development of Helicoverpa armigera was studied in vitro. Of the formulations, Biobit was most toxic to the neonates, followed by Biolep, HD-1, HD-73 and Dipel. Toxicity of these formulations decreased considerably against 5-day old larvae. HD-1 showed highest toxicity to the 5-day old larvae, followed by Biobit and Biolep. Larval growth was considerably reduced in HD-1 and other formulations except for HD-73 where it was at par with control. B.t. affected last instar larval growth and development, pupation and also adult emergence.
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