Gypsy moth (Lepidoptera: Lymantriidae) control with ground-based hydraulic applications of Gypchek, in vitro-produced virus, and Bacillus thuringiensis

Kevin W. Thorpe; John Podgwaite; Jim Slavicek; Ralph E. Webb

Treesearch

Gypsy moth (Lepidoptera: Lymantriidae) control with ground-based hydraulic applications of Gypchek, in vitro-produced virus, and Bacillus thuringiensis

Informally Refereed

Authors:

Kevin W. Thorpe, John Podgwaite, Jim Slavicek, Ralph E. Webb

Year:

1998

Type:

Scientific Journal

Station:

Northern Research Station

Source:

Journal of Economic Entomology. 91(4): 875-880.

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Abstract

Gypchek, a registered microbial insecticide for aerial and ground-based application against the gypsy moth, Lymantria dispar L., was field-tested in 1996 and 1997 at 2 doses (10¹¹ and 10¹² polyhedral inclusion bodies (PIB) per 379 liters (100 gallons) ) and with and without a sunscreen. An in vitro-produced strain of gypsy moth virus was tested in 1997 at the 1O¹¹-PIB dose; however, the effective dose was lower because in vitro-produced PIBs contained 5-fold fewer virions than Gypchek PIBs. Treatments were applied to overstory oak, Quercus spp., trees with a truck-mounted hydraulic sprayer. Larval mortality was significantly greater, and larval density was significantly lower, on trees treated with both Cypchek and in vitro-produced virus than on untreated trees.

Keywords

Lymantria dispar, Gypchek, gypsy moth nucleopolyhedrosis virus, in vitro-produced virus, formulations, arborist

Citation

Thorpe, Kevin W.; Podgwaite, John D.; Slavicek, James M.; Webb, Ralph E. 1998. Gypsy moth (Lepidoptera: Lymantriidae) control with ground-based hydraulic applications of Gypchek, in vitro-produced virus, and Bacillus thuringiensis. Journal of Economic Entomology. 91(4): 875-880.