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Field Test of Acephate Against Two Douglas-Fir Christmas Tree Pests

机译:乙酰甲胺磷对两种道格拉斯 - 冷杉圣诞树害虫的田间试验

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When acephate was applied to Douglas-fir Christmas trees before and after bud burst, it significantly reduced the Douglas-fir needle midge (Contarinia pseudotsugae) population. The same treatments did not significantly reduce the summer generation of Cooley spruce gall aphid (Adelges cooleyi) population but caused increased populations in the winter generation. Symptoms of phytotoxicity occurred on trees treated after bud burst.

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