Abstract
Infective stage juveniles of the entomogenous rhabditoid nematodes, Neoaplectana carpocapsae (Steinernematidae) and Heterorhabditis heliothidis (Heterorhabditidae) were not affected when placed in commercial preparations of Bacillus thuringiensis var. san diego, israelensis and kurstaki. However, nematode development in larvae of the elm-leaf beetle and wax-moth larvae that were simultaneously infected with B.t. var. san diego and kurstaki, respectively, was reduced considerably. Such reductions were dependent on the timing of the initial infections of the two organisms. When nematodes were allowed to enter wax-moth larvae 24 h before B.t. kurstaki was introduced, nematode development was almost normal. Both groups of organisms could be used in a pest-management program, preferably against different target insects.
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