At all of the weather station conditions for a mummy berry fungus infection period occurred from Friday May 9th or Saturday May 10. Please see the table below to see the approximate time when the infection period started in your area. Most growers in Knox, Lincoln and Waldo counties have plants that are susceptible and there are mummy berry cups producing spores in these areas. In Hancock and Washington counties, there are mummy berry cups in the fields producing spores but how far along the blueberry plants have opened vary by field. Growers will need to check their own fields to determine if greater than 40% of flower buds are at F2 and whether they need to spray.
In those areas where there was an infection period, if you have applied fungicide on or after Saturday, May 3rd your plants were protected during the infection period this weekend. If you have not applied fungicides, you have until the evening of Tuesday May 13th, depending upon the rain in your area, in most areas to apply fungicides (propiconazole or fenbuconazole) to kill any infection. Other fungicides should be applied as protectants and before infection periods occur.
|Location 2014||Infection period start|
|Dresden Mills||Sat. May 10 12:40am|
|West Rockport||Sat. May 10 12:40am|
|Appleton||Sat. May 10 1:20am|
|Belfast||Fri. May 9 6:20pm|
|Sedgewick||Sat. May 10 7am|
|North Ellsworth||Sat. May 10 1:40am|
|Eastbrook/Waltham||Sat. May 10 7am borderline|
|Deblois||weather station down|
|Cherryfield||Sat. May 10 8:20am|
|Jonesboro||Sat. May 10 8:15am|
|East Machias/Whiting||Fri. May 9 7:40pm and Sat. May 10 8:40am|
|Wesley||Sat. May 10 8am|