People have been calling in to the Ent lab to asked what they can spray for cranberry fruitworm and/or Spag if they can’t use Delegate, Diazinon, Intrepid or Sevin? This is happening for Ocean Spray growers particularly. Lorsban use is not permitted after June 15, Intrepid cannot be used after July 15, and Sevin cannot be used after 8/1. Only 3 sprays of Delegate are permitted and many...
Cranberry IPM Message
The biggest issue now has been the several days of heat and the stress that it is placing on the vines (including the possibility of scald mentioned within the past few days). Make sure you keep the vines well watered during periods like this until the heat breaks. Some vines have been showing evidence of vein whitening (see photo). Evital applications were made in the fall and likely, the...
Many first fruitworm sprays have gone out already and some growers may be applying their second spray soon. 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 picked berries per acre, with a minimum of 200 berries per piece. Check the guidelines on p.
The Ent lab reports several calls with growers reporting BHF larvae out on the bog.
The Ent lab reports several calls with growers reporting BHF larvae out on the bog.
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 like Delegate, SpinTor, Belay, and Entrust are highly toxic to bees, so spray these products when bees are not actively foraging. Toxicity does drop once the spray dries. ...
Spag finds continue to be the hot insect topic this week. Some second generation weevils have been picked up. Now is also the time that you might be seeing true brown spanworms showing up as thread-like larvae on the rim of the net.
We have had several reports this week of Spag in numbers above the action threshold (>1 per set). Some growers have discussed waiting until sprays are needed for cranberry fruitworm to treat for Spag (to try to save money and sprays). The Ent Lab discourages this consideration. They recommend trying to target the first generation (which is now). Although the larvae are getting large,...
The weather has not been cooperating as far as getting sprays out. Wednesday was one of the best days so far and folks were out sweeping. Reports are variable, but high counts of weevil and BHF are in. Avaunt sprays have been going out for weevil. Winter moth is mostly through its cycle on the bog. If you are going to be using pheromone traps to time Spag, girdler or BHF infestations,...
