Sunday, May 3, 2009

Mummy berry forecast update Sunday May 3rd.
Mummy berry cups are likely still actively producing spores in most blueberry growing areas in Lincoln, Waldo, Hancock, Penobscot, and Washington counties.

With the rain over Friday and Saturday, there was likely an infection period in most blueberry growing areas.
Whether there was an infection period
depends upon the length of plant wetness caused by continuous rain and fog in your area and the temperature during the plant wetness.
Please check the chart in Factsheet #217
at the Wild Blueberry extension site (http://wildblueberries.maine.edu) for more information on the chance of infection depending upon temperature and length of plant wetness.

If you applied fungicide approximately 7 to 10 days before
(anytime from Thursday April 23rd to Friday May 1st) then your plants are STILL protected and you do NOT need to reapply fungicide for control of this last infection period.

IF you need to apply fungicide, remember it needs to be applied within 72 hours of the START of the rain/fog period in your field to control the fungus that got into the plants during this last infection period.

Please see Factsheet #219 Wild Blueberry extension site (http://wildblueberries.maine.edu) for recommended disease control methods.

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