Cooperative Extension: Maine Wild Blueberries

5.10.12 Mummy Berry Forecast: Thursday, May 10

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By Seanna Annis

Waldo, Lincoln, Knox Counties

In later, wet fields, there may have been a few last cups present but there was likely little chance of infection in these areas this past week.

Hancock and Washington Counties

Mature mummy berry cups and new pinheads have still be found in these areas. The rain since Monday has produced one to three infections periods depending upon the field monitored.  Please see below for start times of the infection periods in your areas.

Overall, if you had applied fungicide on or after Thursday, May 3,  your plants were protected during this past week.

If your last application was before Thursday, May 3, then you may want to apply fungicide to your field. You will want to take into consideration if your field has pollinators. Remember that propiconazole and fenbuconazole will protect your fields for about 7 days after application. If your plants were not protected for part of this week, you can apply fungicide within 72 hours of the start of the infection period and kill off most of the fungus that got into your plants.

The forecast for Friday is for scattered showers, so hopefully, it will not be long enough for any infection periods.  I will update the forecast if there are infection periods on Friday.