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Monitoring Growing Degree Days in Commercial Greenhouses for Predicting Western Flower Thrips Emergence 2002

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Project Leader(s): Gary Couch, Ornamentals IPM Specialist — Hudson Valley, NYS IPM Program, Cornell Coop. Exten. of Orange County and John Sanderson, Dept. of Entomology, Cornell University, Ithaca, NY

Cooperator(s): Rose Baglia, Extension Educator, CCE Orange Co., Commercial Horticulture

Teresa Rusinek, Extension Educator, CCE Ulster Co.

Jim Leghorn, Leptondale Greenhouses, Orange Co., NY

Type of grant:

Monitoring, forecasting and thresholds

Biological control and pest biology

Project location(s): This applied research project was conducted in commercial greenhouses in Orange County, but findings could be applied throughout the temperate climatic regions of the U.S.

Abstract: We intend to examine the possible relationship between degree-day (DD) accumulation and sticky trap catches of Western flower thrips (Frankliniella occidentalis) (WFT) in commercial greenhouses. Successful correlation of trap catches to DD accumulation could result in accurate prediction of the onset of adult thrips emergence in the greenhouse that would allow more timely application of control tactics such as releases of predaceous mites or insecticide applications.

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