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Cranberry IPM Message

General Preemergence Herbicides.  Now is the time to be applying Devrinol, Casoron, and Evital for preemergence weed control.

News on the disease and insect fronts 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.

We continue to see conditions that support that the season is running about 2 weeks ahead of average (some fruit are blushing this week).  Flea beetle is out and can be controlled with Sevin and Diazinon if numbers are high.  There are reports of southern red mite damage so keep an eye out for that; Nexter can be used for mite control.  Sprays have been going out for cranberry fruitworm...

We continue to see conditions that support that the season is running about 2 weeks ahead of average (some fruit are blushing this week).  Flea beetle is out and can be controlled with Sevin and Diazinon if numbers are high.  There are reports of southern red mite damage so keep an eye out for that; Nexter can be used for mite control.  Sprays have been going out for cranberry fruitworm...

Just a short message this week. Flea beetles are out. Belay, Sevin and Diazinon are good choices to control flea beetle.  The Entomology lab reports that several growers have already put out sprays to control this pest.  There is also some talk and concern about a third generation of blackheaded fireworm showing, so be on the look out on problem or suspect bogs.

From the Entomology Lab: Keep in mind that Belay is only being recommended for cranberry weevil; it is a better choice than Actara for weevil management. Black-headed fireworm, cranberry fruitworm and Spag are on the Belay label but will likely only suppress at the 4 oz rate.

If you are planning to spray for weevils, you should do so soon. Scout, assess, and treat; don’t wait. Reports of cranberry fruitworm pressure (in terms of unhatched, viable eggs) has been variable; some high numbers and some low. Try to use a magnifier when inspecting the calyx end of the fruit for unhatched viable eggs.

Belay is a new insecticide that targets summer generation cranberry weevil. You may apply it twice per season not to exceed 12 oz/A. Belay is very toxic to bees—spray post bloom! We have heard reports of very high numbers of weevil during the past week (50+ on average). Belay can be used in Zone II and is a viable alternative for weevil control.

Many first fruitworm sprays have gone out already and some growers may be through their two sprays before July 4th.  This is certainly way ahead of normal scheduling.  Late varieties on State Bog hit 50% oob late this week.  The second treatment goes out about 10 days after the first application, if you are using the standard fruitworm practice.  As fruits set, begin inspecting 50 randomly...

Clean Sweep Consulting reported sightings of second generation black-headed fireworm; the larvae are out.  Plan your management based on moth flight and choice of compounds.  Brown spanworm larvae may start to show up soon.  Look for thin, thread-like larvae on the rim of the sweep net.  Check pheromone traps weekly and change lures about every 3-4 weeks as needed.  Several of our new products...

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