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Nine insecticides were evaluated on balsam fir for the control of spruce budworm larvae at the Weir Christmas Tree Farm, Colebrook, N.H. The chemicals were applied on May 29. The treatments were rated 4 days after application. Treatments were applied with a 1-gal 8 &amp; G sprayer at 30 psi. Treatments were replicated 4 times. Each replicate represented one, 6-ft balsam fir tree. When rating the replicates, 10 three-inch branch tips were evaluated for number of dead and alive budworm per tree.

Spruce Budworm Control on Balsam Fir Christmas Trees, 1981