European Corn Borer: Granular Formulations of Bacillus thuringiensis for Control

Bacillus thuringiensis Berliner (Thuricide®) granules in 5.6, 11.25, and 22.5% (wt/wt) concn were compared to determine the most efficacious formulations for control of Ostrinia nubilalis (Hubner). Granular volume per unit area did not significantly influence the degree of control, but the highest concn, 22.5%, gave significantly better control than the 11.25% granules. Comparison of granular and spray formulations of Thuricide and Dipel® showed that granules gave significantly more control of the European corn borer.