Abstract

In 1974, six control methods were tested in 0.4-ha plots, separately and in various combinations, to determine their efficacy in reducing populations and protecting foliage from Lymantria dispar (L.). Methods tested included removing egg masses, spraying egg masses with nucleopolyhedrosis virus, removing resting and pupation locations for larvae, removing larvae and pupae, removing fall egg masses, and trapping adult males with traps baited with disparlure. Trials were replicated, and each control method was tested at three gypsy moth densities. None of the 29 control methods or combinations tested provided even temporary protection from the insect.

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