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IPM Message for Cranberry Growers: Jul 17, 2020

July 17, 2020

Most growers are in the midst of fruitworm and fungicide spraying. The week is looking to be either windy or pretty hot, so grab whatever spray window you can get. Altacor for fruitworm is a good choice and you should allow at least 7 days between applications, 10-14 is better. It does have a good residual but don’t take chances and possibly miss your application window. Do not exceed 9 oz/A per season.

Now is getting towards the end of the window to treat poison ivy with concentrated Callisto sprays.  Plan to treat twice and allow at least 14 days between applications.  Just spray to wet the leaves, not to run-off.

Poast and QuinStar have 60 day PHIs. Fact-acting fertilizer applications (about 30-40% N) for all but the new hybrids go out at 75% out of bloom or late set. Those fertilizing the new hybrids should be on an every 7-day schedule, starting with first fruit set and following with 2 more applications. If you are using Ferbam for fairy ring control, it goes out as a soil drench and applications must be done by July 31st. Apply at a rate of 1 gallon of mixture per each square foot.

We are planning 2 zoom meetings for Aug 18th and 20th to be held in the evenings on pesticide safety topics usually covered in our April meeting. More details to follow soon in our early August newsletter.