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Cranberry IPM Message

News on the disease and insect fronts has been quiet. We have seen some flea beetle damage but reports are fewer. Remember that our fungicides work as protectants, not as curatives. That means if you apply a fungicide AFTER you see the rot, it will do no good. In general, applying fungicides this late is of little use.

We are at the end of the window to use Admire or related products for grub control. If your bees are off the bog, you can apply Actara and Admire if needed. Cranberry weevils (second generation) are out and abundant in some cases. The threshold for spraying is higher for the summer generation; an average of 9 is used to trigger a spray.

If your bees are off the bog, you can apply Actara and Admire if needed. Cranberry weevils (second generation) are out and abundant in some case. The threshold for spraying is higher for the summer generation; an average of 9 is used to trigger a spray. Remember Actara is Zone II regulated and highly toxic to bees.

If your bees are off the bog, you can apply Actara and Admire if needed. Cranberry weevils (second generation) are out and abundant in some case. The threshold for spraying is higher for the summer generation; an average of 9 is used to trigger a spray. Remember Actara is Zone II regulated and highly toxic to bees.

Altacor should have good residual and rainfastness, if you are concerned about sprays going out in this unstable weather pattern that we currently find ourselves. Please use the traditional cranberry fruitworm timing for Howes, spraying 7-9 days after 50% out-of-bloom. This is still the best management strategy for this variety.

Things seem fairly quiet so far. State Bog is 60-80% IN bloom. The Stevens at Rocky Pond Bog in Miles Standish are 5% out-of-bloom. At State Bog, the Ben Lears were 25% out-of-bloom and the Early Blacks were 13% out-of-bloom mid-week.

You may need to be checking early varieties and hybrid varieties soon for %out-of-bloom. Bloom is moving quickly in some areas. It is always good to get 2 %oob counts BEFORE you hit 50%, just to improve your estimate. Some growers may be spraying for fruitworm control by the end of next week. Late water Howes are very behind and barely at bloom yet.

Just a short message this week. Bloom is coming on strong this past week. It is absolutely the time to be putting out first fungicide. The weather has not been cooperative, so if you haven't yet sprayed, do it as soon as you have a chance. The window for controlling early season insects is closing unless you have really high numbers. We have had reports of 14 spag larvae and 20 weevils.

This is the week of spag. There is, however, no easy answer!

Many growers have been treating with Avaunt over the past few weeks for winter moth or weevil. We learned that gypsy moth sometimes gets through Avaunt, similar to spag getting through. One site had false army, blossom, weevil, bhf on a few pieces plus some spag too with all at, or close to, threshold.

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