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2009 Apple Scab Infection Periods 31 Mar - 11 May*
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 ***5/4/09 - found first leaf sysmptoms of scab on Red Del.

•May 11th thru May 14th (possible scab infection: **) forecast based on Skybit Ag E-Weather IPM Apple Disease Report



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Last modified May 13, 2009
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