We have had a long infection period extending in some fields from Friday April 20th and in others from Saturday April 21st. I have below the locations where we have weather stations and roughly when the infection periods started in those areas.
If you had applied fungicide on or after Monday April 16th, your plants were protected during this last weekend and Monday, and you do not need to apply fungicides at this time.
If your last application of fungicide was before Monday April 16th, you have up to 72 hours to apply fungicide (propiconazole or fenbuconazole) from the beginning of the infection period to kill of the fungus. Considering the long period of infection the fungus had from Friday to Monday in some areas, if your last application of fungicide was before Monday April 16th, an application before the end of Wednesday April 25th would still kill off some of the fungus that did get in your plants.
Weather station Start of infection period
Appleton Sat. April 21 at 8pm
Belfast Sat. April 21 at 8 pm
North Ellsworth Sat. April 21 at 7am
Ellsworth Sat. April 21 at 7am
Aurora Sat. April 21 at 4pm
Deblois Fri. April 20 at 7pm
Montegail Pond Fri. April 20 at 9pm
East Machias Sat. April 21 10am
Meddybemps Sat. April 21 6pm
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