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1 October 2004 Evaluation of a Nonconventional Insecticide and Appropriate Application Timing for Destruction of Gypsy Moth (Lepidoptera: Lymantriidae) Egg Masses
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Abstract

Two field studies were conducted in 2001–2002 and 2003 to evaluate the effectiveness and appropriate application timing of Golden Pest Spray Oil (GPSO) for destruction of gypsy moth, Lymantria dispar (L.) (Lepidoptera: Lymantriidae), egg masses in Wisconsin. GPSO is a commercially available, registered pesticide that is predominantly comprised of a soybean-oil base (93%); its primary mode of action is by means of suffocation. Because gypsy moth spends the majority (>75%) of its life cycle in the egg stage (August–April), the potential utility of this product by arborists, city foresters, landscapers, and homeowners is high, especially because GPSO is a United States Environmental Protection Agency registered, nonconventional pesticide that is considered relatively nontoxic. When GPSO was applied at a 1:1 ratio with water, >96% control of gypsy moth egg masses was achieved, regardless of application timing (October, 3 d before egg hatch).

R. Chris Williamson "Evaluation of a Nonconventional Insecticide and Appropriate Application Timing for Destruction of Gypsy Moth (Lepidoptera: Lymantriidae) Egg Masses," Journal of Economic Entomology 97(5), 1671-1674, (1 October 2004). https://doi.org/10.1603/0022-0493-97.5.1671
Received: 5 December 2003; Accepted: 1 June 2004; Published: 1 October 2004
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