Mummy berry season appears to be finished in most areas finally. This has been one of the longest seasons of mummy berry cups in the last 5 years.
From Tuesday May 15th, dried up cups with no mature cups were seen in Ellsworth, Silsby Plain (Aurora), Deblois, in multiple fields in the barrens, Wesley, and Jonesboro. We had numerous infection periods this week as the cups were finishing up. There would have been fewer mummy berry cups shooting spores in this past week, which should decrease the chance of infection.
We had cooler temperatures Thursday night, but none of the monitored fields dropped below 28 F which is the estimated temperature tolerance for fully open flowers.
Next year, I hope to have more growers tracking mummy berry plots and to have the forecast out earlier in the day with improved weather data analysis.
The weather stations will stay in place for the season and their data is available at the following website:
Maine Blueberry weather stations
Listed below is the start times of the infection periods in our monitored fields.
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