Yesterday, Winchester had a drizzle during 3-4am with an average temperature of 58F. It was not a major rain event; however, the relative humidity was almost 100% until 10am. In addition, we had a rain event from 8:30 to 9:30am with an average temperature of 55F. A combined precipitation was 0.08 inches.
If you separate these events, it was not enough for Phomopsis to cause disease. However, since the relative humidity was high during the night, I tend to think it was a continuous event. If we combine both rain events, it was enough for a moderate infection (15-25% severity) for Phomopsis. Considering how wet it has been, ascospore discharge of powdery mildew was probably initiated with these rains (especially after 3 am one) whether you combine events or not. (but the morning rain might have washed spores off from leaves... a wishful thining ;))
I was running 10K for Apple blossom festival during the morning rain. It brought temperature down and was nice for me, and after the rain, we had a really nice Saturday afternoon to enjoy the parade.
We are having a yet another rainy day. It started around 8am and still going as of 10am. A radar image is showing green around Winchester...
If you separate these events, it was not enough for Phomopsis to cause disease. However, since the relative humidity was high during the night, I tend to think it was a continuous event. If we combine both rain events, it was enough for a moderate infection (15-25% severity) for Phomopsis. Considering how wet it has been, ascospore discharge of powdery mildew was probably initiated with these rains (especially after 3 am one) whether you combine events or not. (but the morning rain might have washed spores off from leaves... a wishful thining ;))
I was running 10K for Apple blossom festival during the morning rain. It brought temperature down and was nice for me, and after the rain, we had a really nice Saturday afternoon to enjoy the parade.
We are having a yet another rainy day. It started around 8am and still going as of 10am. A radar image is showing green around Winchester...
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