SEDL / STP / STP1112-EB / STP16887S

Evaluating the Field Efficacy of Bacillus thuringiensis Berliner against the Western Spruce Budworm (Lepidoptera:Tortricidae)

Riley, CM
Pesticide Application Specialist, Research and Productivity Council, Fredericton, New Brunswick

Wiesner, CJ
Senior Scientist, Research and Productivity Council, Fredericton, New Brunswick

Scott, DW
Entomologist, Forest Service, Wallowa-Whitman National Forest, Forest and Range Science Laboratory, La Grande, Oregon

Weatherby, J
Forest Entomologist, Forest Service, Forest Pest Management, Boise Field Office, Boise, Idaho

Downer, RG
Statistical Consultant, University of New Brunswick, Fredericton, New Brunswick

Pages: 20    Published: Jan 1992

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Abstract

A detailed assessment of spray deposition and efficacy of Dipel 6AF and Thuricide 48LV was carried out as part of the 1988 western spruce budworm control program. An analysis of covariance model was used in an attempt to examine the relationship between deposit density and field efficacy (larval mortality and defoliation) for the two formulations. The model could not be justified and relationships between the variables were investigated using chi-aquare analysis.