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Excerpt from Field Testing of Bacillus Thuringiensis for Control of Western Hemlock Looper
A. Determine when larval mortality commenced, reached a peak, and ended and how much mortality occurred.
B. Relate spray deposit and spray distribution to total looper mortality at the end of a 20-day period.
C. Test the frass-drop method as means for evaluating 100per mortality.
D. Deduce indirect effects of spraying on larval development and biotic control agents.
E. Evaluate population trends and tree damage occurring 1 and 2 years after spraying.
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