Blueberry Blog - Cooperative Extension: Maine Wild Blueberries - University of Maine Cooperative Extension

Wild Blueberry Blog

Real-Time Updates on Frost, Disease and Pest Events in Maine!

Events are grouped by year below. Please consider filling out the signs and symptoms survey at the bottom of this page to help track these events and improve real-time updates for growers.

For older posts please visit the Blueberry Blog Archive

Botrytis cover blueberry plant post bloom

2020 > 2018

2020

It is time to begin monitoring for Spotted Wing Drosophila
Possible frost overnight June 1st to June 2nd in many locations
Frost and Botrytis risk from May 23rd to June 1st
Mummy berry season over in most areas for 2020 – symptoms to look for
Cold temperatures overnight May 13 to May 14, Probable Monilinia infection on Friday May 15th
Cold temperatures overnight from May 12th to May 13th
Mummy berry infections from May 11th to May 12th
Possible mummy berry infection period and cold temperatures May 8 to 10th
Mummy berry infections and frost May 6 to May 8th
Mummy berry infection period in Waldoboro and West Rockport areas May 4th
Mummy berry infection period May 3 to May 4, 2020
Probable Mummy berry infection in most locations, May 1 2020
Mummy berry infections likely later this week, April 28
Mummy berry season is getting close April 15, 2020

2019

7.25.19 Time to put out Mummy Berry plots for next year
6.13.19 End of Botrytis Risk in Most Fields
6.04.19 Frost Event Downeast, Morning of June 4
5.29.19 Weather Station App & Frost Event, Morning of May 28
5.27.19 Botrytis Risk May 23 to May 27
5.20.19 Mummy Berry Infection in Some Fields, May 20 & Botrytis Blossom Blight
5.18.19 Mummy Berry Infection period in Some Fields, May 17 to May 18
5.16.19 Another Mummy Berry Infection May 15 to May 16
5.15.19 Mummy Berry Infection May 14 to May 15
5.10.19 Mummy Berry Infection period May 10
5.08.19 Mummy Berry Infection period May 7 to May 8
5.06.19 Mummy Berry Infection period, May 7 to May 8 & May 4 to May 6
5.03.19 Mummy Berry Infection period, May 3 to May 4
5.01.19 Mummy Berry Infection periods Overnight, May 1 to May 2
5.01.19 Possible Future Mummy Berry Infection, Later this Week – May 1
4.26.19 Possible Infection period in Midcoast region, April 26 to April 27
4.26.19 Possible Mummy berry Infection Period, Waldoboro – April 26
4.24.19 Mummy Berry Season is Starting for 2019

2018

5.05.18 Mummy Berry Season Probably Over for 2018
5.20.18 Possible Mummy Berry Infection period in Later Fields, May 19 to 20
5.16.18 Mummy Berry Infection period, May 16 to May 17
5.15.18 Mummy Berry Infection period, May 15 to May 16
5.14.18 Mummy Berry Infection period, May 14 to May 15
5.12.18 Mummy Berry Infection period, May 12 to May 14
5.10.18 Mummy Berry Infection period Overnight, May 10 to May 11
5.09.18 Another Mummy Berry Infection Period, May 9 to May 10
5.09.18 Mummy Berry Infection period, May 8 to May 9
5.08.18 Mummy Berry Infection in Some Areas, May 7 to May 8
5.06.18 Mummy Berry Infection period, May 6 to May 7
5.04.18 Mummy Berry Infection period, May 4 to May 5
5.03.18 Mummy Berry Infection period, May 3 to May 4
4.29.18 Possible Mummy Berry Infection period in Midcoast, April 29
4.28.18 Possible Mummy Berry Infection in Knox, Lincoln and Waldo on April 28
4.26.18 Mummy Berry Report, April 26
4.24.18 Mummy Berry Season is Starting
4.19.18 Mummy Berry Season is Starting: WARNING on Propiconazole

What Signs and Symptoms have you observed?

Observation
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Frost damage on blueberry flowers and buds

Frost kills all flowers on each stem and newly emerging leaves