Cranberry IPM Message

IPM Message for Cranberry Growers: June 14, 2024

Insects.

Many growers report remarkably empty sweep nets this week. Generally, no counts or low counts of weevil. The cape bogs have significant black bug infestations that are not being seen in central cranberry areas like Carver. Acetamiprid (Assail, Arvida) is being tried as another option for managing these new found pests.

MDAR Online Pesticide Use Reports are due June 30, 2024. You cannot submit hard copies. All reports must be submitted electronically. All licensed and certified pesticide applicators are required to submit annual reports of the quantities of all pesticides used. ...

Insects.

The Diagnostic Lab is up and running, and available during our normal operating hours! The Diagnostic Lab is room 121 in the lab building. Once you arrive at the Cranberry Station please enter through our main entrance and follow signs directing you upstairs toward the Diagnostic Lab.

Cranberry weevil and green spanworm are the only game in town! These are the 2 pests to be watching for. Many bogs have low or no weevil numbers, a few have the usual 2-4, but a few have fabulously high counts (25-75). A very few growers have already shot their Fanfare to manage these insects. The cool weather has kept most from sweeping and managing! Remember...

Insect Management. The 2024 bug season has begun! Monday and Tuesday this week had warm days and weevil made a star appearance. Where cranberry weevil has been a historic problem, you could go sweep those spots and get 10 or 20 weevil. Other sites had 0, 2, or 4 counts. Weevil should be mostly on blueberry at this time, and they were found there too. With the return of...

There will be no regular updates to the IPM message going forward. If something comes up that should be addressed, I will make a special update. if you have any specific questions, please call Hilary at 508-970-7641. thank you and I hope your harvest season goes well.

We have been fielding several calls about mixing pesticides. You should ALWAYS do a jar test before mixing a new combination of pesticides in your tank. We have tried Delegate and Callisto and do NOT recommend that combination; it forms clumps and would be a big problem in your tank. People have asked about mixing coppers and Callisto.

Not really much to update this week. It has just been the weather, the weather, the weather. Conditions have been hot and dry and likely some growers are struggling to keep up with the water demands of their vines. It’s important to keep up with the watering to support fruit sizing.

Now is the time to spray for cranberry weevil if you have very high numbers. Contracted migratory honeybees must be pulled out before the Actara spray goes on and bloom should be complete. Actara is extremely toxic to bees, so only spray if you must!

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