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IPM Message for Cranberry Growers: Aug 17, 2018

August 17, 2018

If you are still applying pesticides (e.g., 2nd application of Ridomil or Aliette for Phytophthora), be sure to observe all needed PHIs.  Ridomil products and Callisto have a 45-day PHI; Aliette has a 3-day PHI.  QuinStar and Poast are 60 days, Stinger is 50 days. Select and Intensity products are 30 days.

 Upright dieback is showing up on a number of bogs as a result of heat stress this summer in a big way.  Unfortunately, the treatment is chlorothalonil applied during bud break – around May 15, not now. 

Yellow vine syndrome is being seen, also exacerbated by the heat. 

Scale damage also continues to worsen as a result of heat stress.  If you see areas of damage, report to Entomology (Marty, x20) as we are monitoring the next crawler release! 

Sparganothis fruitworm is now easy to find on the bogs as they have eaten out 2 or 3 berries and are ½-1 inch long.  Moths have not started up, but it is getting a little late for any management.