Back to Previous Page
2005 Downy Mildew Infection Period July 8- August 8*
Penn State-FREC, Biglerville, PA**

Click here to view large version of graph

Downy Mildew infection perios 4/21/04

* Downy Mildew (Plasmopara viticola): Infection to the first appearance of symptoms approximately 4 days. Rain is the principal factor promoting epidemics.
Temperature plays a less important role by retarding, accelerating the development of the disease. Green parts of vine and leaves are suceptible to infection.
** Campbell Scienctific & Field Weather Data Systems. As of 7 am on August 8th

Download Excel Spreadsheet of weather data
Copyright Information
This publication is available in alternative media on request.
Penn State is committed to affirmative action, equal opportunity, and the diversity of its workforce.
This was designed and developed by ICT WebDevelopment.
Please e-mail us with your questions, comments, or suggestions to
Last modified December 20, 2006
The Fruit Research & Extension Center The College of Agricultural Sciences The Pennsylvania State University The Fruit Research & Extension Center About FREC The Fruit Research & Extension Center Entomology Research Namatology Research Horticulture Research Plant Pathology Research