Recent field research experience with B.t. against spruce budworm in the eastern U.S.

John B. Dimond

Treesearch

Recent field research experience with B.t. against spruce budworm in the eastern U.S.

Informally Refereed

Authors:

John B. Dimond

Year:

1985

Type:

General Technical Report

Station:

Northern Research Station

Source:

In: Grimble, David G.; Lewis, Franklin B., coords. Proceedings, Symposium: Microbial control of spruce budworms and gypsy moths; 1984 April 10-12; Windsor Locks, CT. Gen. Tech. Rep. NE-100. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 47-53

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Abstract

Recent testing in the eastern U. S. has led quickly to the adoption of 12 BIU/acre as the best operational dosage rate, with operational spray emission rates reduced to a quart or less per acre. Some recent work suggests that older larval instars of the budworm are highly susceptible to B.t. sprays, and the effective "spray window" can be broadened when budworm populations are moderate. New studies on second-year benefits of B.t. treatments are producing negative results.

Parent Publication

Proceedings, Symposium: Microbial control of spruce budworms and gypsy moths

Citation

Dimond, John B. 1985. Recent field research experience with B.t. against spruce budworm in the eastern U.S. In: Grimble, David G.; Lewis, Franklin B., coords. Proceedings, Symposium: Microbial control of spruce budworms and gypsy moths; 1984 April 10-12; Windsor Locks, CT. Gen. Tech. Rep. NE-100. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 47-53