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Forecasts of Grape Downy Mildew for New York and Pennsylvania Regional IPM Programs 1997

Project Leaders: David Gadoury, Robert Seem, Wayne Wilcox

Objectives:

1. Simplify DMCAST for use in the VITIS expert system and a regional IPM program

2. Evaluate the efficacy, practicality, and economy of using DMCAST forecasts of infection in control decisions for downy mildew, powdery mildew, and black rot.

Results:

DMCAST warnings of secondary infection timed fungicide applications for effective control with a reduced number of sprays. This package can now be made available as part of the VITIS expert system and as on on-line service for New York and Pennsylvania grape growers.