The total hours of wetness was about 18h with the average temperature at 50-56F. It was long and warm enough for both Phomopsis and black rot. Also, these spring rains will help powdery mildew spores (ascospores that are from winter survival) to be disseminated to the air.
Winchester area received precipitations from thunderstorms yesterday. It started around 3:30PM and lasted until 7:00PM. The actual amount of precipitation was not high (0.05 in) compared with other northern VA regions where a severe thunderstorm warning was issued, but since the ending part of the thunderstorm hit during the evening, the relative humidity was high (>90%) until 2 AM or so. Thus, it accounted for 11.5 hours of wetness with the average temperature of 73F. It was warm and long enough for Phomopsis, black rot, and downy mildew. We are still having chances of rain (40-60%) until Monday.
Hi, Great info here but as wondering if you could also post prior to an event with your recommendations based on the forecast.
ReplyDeleteHi, Good question. A short answer is "We are working on it." ;)
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