Efficacy of Aerially-Applied Gypchek against Gypsy Moth (Lepidoptera: Lymantriidae) in the Appalachian Highlands2
Gypsy moth, Lymantria dispar L., populations in six northern Virginia plots were aerially treated with the nucleopolyhedrosis virus product, Gypchek. Two applications of an aqueous Orzan LS-Pro Mo-Rhoplex B60A tank mix, each at 18.7 liters and 1.25 × 1012 polyhedral inclusion bodies per ha, reduced larvae by more than 92% and egg masses by more than 94% in all but one of the treated plots. Defoliation averaged 22% in Gypchek-treated plots compared to 67% in control plots.
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2This article reports the results of research only. Mention of a proprietary product does not consititute an endorsement or a recommendation for its use by the USDA.
3Forest Pest Management, USDA-FS, 180 Canfield St., Morgantown, WV 26505.
4George Washington National Forest, USDA-FS, P.O. Box 233, Harrison Plaza, Harrisonburg, VA 22801.