2009 Apple Scab Infection Periods 15 Jun - 19 Jul* 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
No more spore release as of 6/21/2009.
•July 20-22 (active, but no scab infection +) forecast based on Skybit Ag E-Weather IPM Apple Disease Report
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