Botrytis risk May 20th to 24th and cold temperatures May 24th
Some fields had conditions for Botrytis infections over the last weekend from May 20th to May 24th. If your field already had Botrytis disease before this weekend, then there was a chance of more Botrytis infection occurring under these weather conditions. If you did not have any visible disease, then the risk of infection was minimal no matter what the weather conditions.
There were also some fields that experienced colder temperatures last night, May 24th. The effect of these temperatures will depend upon what stage of bloom your plants were. Any temperature that was below 35F is reported since the weather stations are at only one location in a field and there may have been colder temperatures elsewhere in the field. None of the temperatures recorded at the weather stations were below 30F which is typically not a temperature that damages blueberry flowers, but for some cold sensitive blueberry clones these temperatures may have been low enough temperatures to cause damage.
|Location||Botrytis risk from 5/21 to 5/24||Cold temperatures (<35F) May 24 morning|
|Hope/Appleton||medium||4:30am to 6am lowest temp. 34.7 F|
|Searsport||very high||12am to 6am 31F|
|Blue Hill||minimal||4:40am to 5:20am 34.2F|
|Ellsworth/ Hancock||low||4:20am to 6am, 33.4F|
|Aurora||low||4:50am to 5:20am, 31.1F|
|Eastbrook||very high||5am to 5:50am , 34.2 F|
|Steuben||medium||4:50am to 5:20am 33.4F|
|Deblois||minimal||12:50am to 4:40am 31F|
|Montegail||low||3:30am to 3:50am 34 F|
|Crawford||minimal||4:40am to 5:20am 34F|