Fact sheet for SWD management in Michigan Highbush blueberries: SWD Management Recommendations for Michigan Blueberry, Updated June 2014 (PDF), which is very informative and includes a table with rain steadfast properties of some of the SWD insecticides. SWD Management Recommendations for Michigan Blueberry, Updated June 2014 (PDF) (Michigan State University College of Agriculture & Natural Resources […]
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There have been some reports of localized patchy frost damage the last week of May followed by Botrytis symptoms showing up this week. Frost will make blossoms more susceptible to Botrytis infection. I have heard this from growers in the Union area and around the Orland area. In one field, we saw low levels of […]
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Frost In Northern Hancock at our Silsby Plains site and at our Deblois and Cherryfield weather station locations in Washington County, there were frost conditions overnight from Wednesday, May 28 to Thursday, May 29. Lee Beers is a Ph.D. student studying cold tolerance in blueberries and his research has found conditions from 28ºF to 24ºF […]
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I think the mummy berry infection season is now over for 2014. Any remaining cups would have dried up over the last few days, so there won’t be any spores to infect the plants. I don’t think the wet weather we had this weekend or will have on Tuesday will be causing any infection periods […]
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Hancock and Washington Counties Mummy Berry Disease There was another infection period overnight for mummy berry disease in all fields with weather stations in Hancock and Washington counties. Most cups will be dying off by now, but if you have a later or wetter field there is a chance you may have had infection period […]
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Knox, Lincoln and Waldo Counties Botrytis Blossom Blight This is the time of year to scout for Botrytis blossom blight on early blooming blueberry clones. Look at dead open flowers, and any dead or dying tissue (leaves or flowers) you see on weeds near or in your fields. The symptoms are dead, open, flowers with […]
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Lincoln, Knox, Waldo Counties Only dried up cups were found last week in these areas. There is a chance later fields farther north around Belfast area may still have had infection periods this last weekend. I expect fields farther south were not affected. Hancock and Washington Counties Cup that would produce spores were found on […]
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Knox, Lincoln, Waldo Counties Growers reported only finding dried up cups on Tuesday, May 13 in their mummy berry plots. I do not think the cups were done at that time in most fields since there is a range of when cups develop and I expect there were lingering cups around. There were infection periods […]
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Knox, Lincoln, and Waldo Counties I think we are getting close to the end of the infection periods in these areas. There are a few drying up cups being reported but no new ones coming along. There were infection periods overnight from Monday, May 12 to Tuesday, May 13 at our Appleton weather station, staring […]
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At all of the weather station conditions for a mummy berry fungus infection period occurred from Friday, May 9 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 […]
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