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In the summer of 1985 a field experiment was conducted in the Sugarloaf area of Maine on the use of B.t.i. to reduce the numbers of black fly larvae in the Carrabassett River and a tributary stream. The objectives were to determine the rate of application necessary to produce an acceptable reduction in black fly larvae, to study the fate and persistence of B.t.i. in a stream following application, to determine the impact of B.t.i. on the abundance and drift of non-target stream insects and on the feeding success and diet composition of fishes in the treated streams.
Maine Agricultural Experiment Station
black flies, Bacillus thuringiensis
Gibbs, K.E., F.C. Brautigam, C.S. Stubbs, L.M. Zibilske. 1986. Experimental applications of B.t.i. for larval black fly control: Persistence and downstream carry, efficacy, impact on non-target invertebrates and fish feeding. Maine Agricultural Experiment Station Technical Bulletin 123.