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IPM Message for Cranberry Growers: Aug 4, 2009

August 4, 2009

Infestations of flea beetle have been reported. Sevin and Diazinon are good choices for flea beetle. It is generally thought that populations in the range of 20-30 indicate a spray is needed, but growers should also consider their own experience. If you are not sweeping, you should go out and look for evidence of damage, especially if you have had problems in the past. If you have grubs and are considering using Admire, your window of opportunity is quickly closing and you should apply soon.

News on the disease front has been quiet. It is getting to be the time to put out bud set fertilizer applications if that is part of your nutrition program. The CCCGA Annual meeting is scheduled for Tuesday August 18 at Oiva Hannula & Sons. Contact the CCCGA for more information.

If you plan to do tissue tests, collect your samples from mid-August through mid-September. You can get your samples analyzed locally or send them off to UMass for analysis. Samples should contain no more than the top 2 inches of growth (no roots, soil, runners, or fruit). Collect tissue from vegetative and flowering uprights. You typically need about 1 cup of vine tissue. Do not collect samples when the vines are wet and do not send the samples in plastic ziploc bags. Always request nitrogen determinations when you submit your samples.

The last IPM message for the 2009 summer season will be uploaded by Friday August 21.