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Pathogenicity of Bacillus thuringiensis variety kurstaki to Ixodes scapularis (Acari: Ixodidae)
E Zhioua1, K Heyer, M Browning
1Plant Sciences Department, University of Rhode Island, Kingston 02881, USA.
Journal of Medical Entomology
|December 11, 1999
Abstract:
Pathogenicity of the entomopathogenic bacterium Bacillus thuringiensis variety kurstaki de Barjac & Lemille was tested against the black-legged tick, Ixodes scapularis Say. Engorged larvae dipped in a solution of 10(8) spores per milliliter showed 96% mortality 3 wk after infection. The LC50 value for engorged larve (concentration required to kill 50% of ticks) was 10(7) spores per milliliter. B. thuringiensis shows considerable potential as a microbial control agent for the management of I. scapularis.