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2009 Apple Scab Infection Periods 18 May - 21 Jun*
Penn State-FREC, Biglerville, PA

* Spectrum Weather Data Systems & Mills Apple Scab Disease Model. First mature ascospores on 3/31/09.

**Beginning of peak ascospore maturity 4/19/09. Found first leaf sysmptoms of scab on Red Del. on 5/4/09

•Jun 22 thru Jun 24 (no possible scab infection: *) forecast based on Skybit Ag E-Weather IPM Apple Disease Report


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Last modified June 26, 2009
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