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Cranberry IPM Message

Final Keeping Quality Forecast is for GOOD quality.  Frank has calculated that we obtained 7 out of 16 points for this year.  You should probably be able to reduce your fungicide rates and/or the number of applications.  If you use Abound, it does have a 14-day water holding requirement.  Frank has mentioned that he has had conservations with the manufacturer to get this changed, but it is not...

Bees are coming out onto the bogs so exercise caution with all pesticide sprays.  We have had reports of more than 100 BHF moths caught in a trap.  Intrepid is pollinator safe but it is Zone 2 restricted.  Be sure to check the Chart Book to make sure you are waiting the proper intervals between sprays and observing the correct water holding times as needed.  If using Intrepid or Confirm for...

Black-headed fireworm moths have been caught in traps.  We saw our first one on Monday of this week.  When treating the summer generation with Intrepid or Confirm, timing is 2 weeks from the onset of flight, so you must be monitoring now!!  The second spray would follow 10 days later.  If using conventional insecticides, apply 10 days after peak moth flight, which is usually during bloom. ...

The good news is that we have not yet seen any black-headed fireworm moths in our traps yet.  If you have not done so, get your pheromone traps out as soon as you can.  Stevens uprights collected yesterday are at hook.  We could see scattered bloom next week, especially if the warm weather continues.

All insects are out.  Be diligent with your scouting.  Even if you did not see anything last time you were out, go sweep at least once per week.  If you have BHF, you should treat ASAP (see below).  Interestingly, we sprayed Avaunt on Friday and Marty fed larvae on treated uprights that were collected on Monday and the larvae are now dead or dying.  Marty collected BHF larvae off the bog...

BHF, weevil, and cutworms are out.  Some pests are coming in over threshold and are needing sprays for management.  If you haven’t already starting scouting, you should get out as soon as possible.  You may want to get your trap equipment together over the next week or so and be ready to put the pheromone traps a bit earlier than June 1 this year.

The message has not changed much since last week.  We have heard of a couple of growers who are opting to spray for winter moth.  The string of frost nights this week has hampered herbicide applications for dodder control and other preemergence options.  The growth stage of the vines continues to be very ahead of average.  We continue to find emerged dodder seedlings on bogs this week and the...

The bogs continue to be more advanced than average.  We found emerged dodder seedlings on a bog in Bridgewater yesterday (see photos below).  This is almost 2 weeks ahead of usual, which is early May.  If you are using Casoron as a preemergence control for dodder, you should plan on putting some out very soon.  You may want to consider doing a 25-40 lb/A application within the next week or so...

The Entomology lab reports remarkably early emergence of insects this year. Winter moth has hatched and can be seen feeding on blueberry. Winter moth has been found on cranberry this past week at low levels. It would be wise to sweep bogs to check as soon as good weather prevails (next week hopefully). Tiny threadlike green spanworm and tiny false armyworm are also out.

We have a new fact sheet for winter moth available on the web site: Winter Moth Factsheet 2010.  It has some color photographs to help aid in identification and management.  With the warm weather we have been having, larvae could be emerging a bit earlier than the usual mid-late April.  Eggs begin hatching in mid-April.  Researchers at UMass are predicting high numbers of WM based on moth...

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