Comparison of the effect of the variety israelensis with other varieties of Bacillus thuringiensis on nontarget organisms of the order Hymenoptera: Trichogramma cacoeciae and Apis mellifera
Krieg, A.; Hassan, S.; Pinsdorf, W.
Anzeiger fuer Schädlingskunde, Pflanzenschutz, Umweltschutz 53(6): 81-83
Oral application of Bacillus thuringiensis var. israelensis (serotype H14) in a concentration of 5 × 10^7 spores crystals/ml to adults of Trichogramma cacoeciae over a period of 7 days did not significantly reduce their capability to parasitize Sitotroga cerealella host eggs. Feeding of the same preparation in a concentration of 1 × 108 spores crystals/ml to honey bees (Apis mellifera) over 7 days did not induce any toxic or pathogenic effects. Parallel testing of other varieties (serotype HI resp. H3a,b) of B. t. also showed no deleterious effects on the test insects.