Lj. Galanwong et al., EVALUATION OF NATIVE STRAINS AND AN HD CO LLECTION OF BACILLUS-THURINGIENSIS SEROTYPE H8 AGAINST LEPIDOPTERA LARVAE, The Southwestern entomologist, 19(3), 1994, pp. 301-307
Eleven native strains of the GM code of Bacillus thuringiensis serotyp
e HS and ten strains of the HD collection obtained from stored extract
s were evaluated as to their toxicity against three lepidopteran pest
of economic importance in Mexico (Trichoplusia ni, Heliothis virescens
, and Spodoptera exigua) . Each strain was grown on molasses medium fo
r the production of spore-crystal complexes. These were extracted by t
he lactose-acetone coprecipitation method. Results showed that none of
the GM, H8 serotype strains evaluated has a potential for biological
control against the tested species and that the best HD strains were H
D-116 and HD-530 serotype H8a8b against T. ni.