Cooperative Extension: Maine Wild Blueberries

5.01.19 Mummy Berry Infection periods Overnight, May 1 to May 2

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There were infection periods across blueberry growing regions in Midcoast and Downeast overnight.  Most growers with mummy berry plots in these regions have reported cups in their fields.   Many have reported their plants are at 30 to 40% F2, but some fields were not at that stage yet.  Please check your plants.

If you have applied a fungicide in the past 7 days before May 1st (April 24th on) your field would have been protected during this infection period.  You have approximately 48 to 72 hours from the start of the infection period to apply fungicides with some kickback activity (propiconazole or fenbuconazole) to protect your plants.  If you could apply one of these fungicides by the evening of May 3rd to May 4th, you will get some protection from infection.