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Powdery Mildew Maps
Powdery Mildew Advisory
The maps displayed on this site are generated through a reliable computer model based on accurate weather data collected from serveral sites throughout each region. The powdery mildew index is an indication of climatic conditions which may be conducive to development of powdery mildew disease. It is possible to have the disease present and active at economically damaging levels even when the powdery mildew index indicates a low likelihood of conditions favoring rapid development of the disease. Frequent field scouting by a qualified PCA is recommended.
This information is deemed reliable but is not guaranteed. It should be used in combination with regular field scouting, knowledge of field history and common sense. Individual field practices such as irrigation may change specific microclimates from field to field.
Disclaimer: Model developed by the University of California. Data contained herein is derived through interpolation from site specific point data from in-field weather stations. Information is provided on an as is basis for general reference. Does not constitute a recommendation.
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