Co-Authors:
Wysoki, M., Dept. of Entomology, ARO, Volcani Center, Bet Dagan, 50250, Israel
De Haan, P., Laboratory of Experimental Entomology, University of Amsterdam, Kruislaan 302, SM Amsterdam, 1098, Netherlands
Abstract:
A strain of Bacillus thuringiensis Berliner effective against fourth-instar Boarmk selenaria Schiffermüller (Lepidoptera: Geometridae) was found. Strain HD-251 of the variety kurstaki H-serotype 3a, 3b was more effective than the standard HD-1-S-1980 in laboratory bioassays. The potency of HD-251 is two to four times higher than that of the standard, and varies from 19,821 to 68,645 IU/mg. Two other strains of the variety aizawai H-serotype 7, viz., HD-249 and T63L4, were inferior to HD-251, with potencies of 6,982 and 13,714 IU/mg, respectively, against first-instar larvae. © 1988, Springer Science + Business Media B.V.. All rights reserved.
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