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Carbofuran Trials in a Red Pine Seed Orchard

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Seed and cone insects can drastically reduce seed yields from pine seed orchards and consequently reduce the profitability of entire tree improvement programs. Liquid and granular formulations of carbofuran both controlled the eastern pine seedworm, the red pine coneworm, the webbing coneworm, and a cone resin midge in field trials at a red pine seed orchard in southern Wisconsin. Both formulations substantially reduced the frequency of insect attacks when applied at the rate of 0.8 oz of active ingredient per inch of tree diameter. The percent of cones attacked by insects declined from 96% in untreated trees to 32% in trees treated with granular carbofuran and 11% in trees treated with liquid carbofuran. Some phytotoxicity was noted on trees treated with liquid carbofuran; phytotoxicity was much less apparent on trees treated with the granular formulation. Label amendments have been made to allow the operational use of carbofuran in northern pine seed orchards, and this may make northern tree improvement programs more profitable. North. J. Appl. For. 4:177-180, Dec. 1987.
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Document Type: Journal Article

Affiliations: FMC Corporation, Agricultural Chemical Group, 4874 Enchanted Valley Road, Middleton, WI 53562

Publication date: 1987-12-01

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