Cooperative Extension: Maine Wild Blueberries

5.03.20 Mummy berry infection period May 3 to May 4, 2020

Print

There were conditions for mummy berry infection periods at possibly all weather station locations.  This may be the case in your field too if you are near a weather station.  I do suggest you check the development of your plants.   Most infections started late Sunday May 3rd to early Monday May 4th.  We have two weather stations, Searsport and Crawford, that were not working well.  At Searsport, I am confident there were conditions for mummy berry infection considering the plants and weather in surrounding fields.  In Crawford, we have no report of plant stage since last Tuesday.  If the plants had progressed and considering the weather in that area, I suspect that area also had possible infection periods.

If you applied fungicide after April 26th, your field was protected during this infection period.  If you have not applied fungicides, if you can apply propiconazole or fenbuconazole before Wednesday May 6th 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/

Please let me know how your mummy berry plots are doing and if your plants are still getting close to F2, I would like to know that too.