Recommendations for control of cone and seed insect pests of black spruce, Picea mariana (Mill.) B.S.P., with insecticides

Foliar sprays of dimethoate (1.25 g AI per tree) and permethrin (0.028 g AI per tree), applied to run-off one week prior to female flower bud flush, significantly reduced flower abortion, cone grazing, and shoot grazing caused by spruce budworm, Choristoneura fumiferana (Clem.), larvae as well as da...

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