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Laboratory performance specifications for a bacterial bacillus thuringiensis and a viral baculovirus heliothis insecticide



Laboratory performance specifications for a bacterial bacillus thuringiensis and a viral baculovirus heliothis insecticide



Journal of Economic Entomology 70(4): 437-441



A spinning disc, droplet generator produced mean droplet sizes which were within 4% of the attempted sizes. The largest droplet size CV [coefficient of variability] was 16.2% and all other CV's were less than 10%. Cabbage loopers, Trichoplusia ni (Huebner), and bollworms, Heliothis zea (Boddie), were used to evaluate performance specifications for conventional formulations of B. thuringiensis Berliner var. kurstaki and B. heliothis, respectively. Correlation coefficients between mortality and application rate (amount technical material/ha), droplet size, density (number droplets/cm2) or concentration indicated that application rate was more important than droplet size, density, or concentration. Analysis of the residual mortality means indicated that several combinations of droplet size, density and concentration provided effective control.

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Accession: 005788126

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DOI: 10.1093/jee/70.4.437


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