Cooperative Extension: Maine Wild Blueberries

5.08.20 Mummy berry infections and frost May 6 to May 8th

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There are still mummy berry cups reported in all locations that have been examined.  I think there are still cups present in all locations.  Over the past two days, a few fields near Brunswick, Waldoboro, Gouldsboro and Montegail experienced conditions for Monilinia infection on one or both of the last two nights.  Other fields, Brunswick, Gouldsboro, Blue hill, Aurora, Deblois, and Montegail  experienced possible frost conditions.  Please see table below for information on specific sites.

If you have a field in the areas that had Monilinia infection periods and applied fungicide after April 30th, your field was protected during this infection period.  If you have not applied fungicides, if you can apply propiconazole or fenbuconazole before May 10th evening, you are likely will decrease the infection in your field.

Please check with your processor before applying fungicides and follow the fungicide recommendations for 2020.  You can find the “Disease Management Chart 2020” on this website https://extension.umaine.edu/blueberries/factsheets/disease-2/