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Cranberry IPM Message

As you are getting ready for your first fungicide spray, please note that fungicide applications should have good coverage and take place before fruit rot fungi infect plant tissues.

Weevil has finally peaked out and Actara treatments are working well.  Some Avaunt success has also been reported.  Sparganothis and Black-headed fireworm should be wrapping up, but just like with the vine development, size is all over the place. ...

It is time to be thinking about fertilizer applications. The rate used will vary by cultivar, previous summer tissue tests and historic bog response.

Perhaps all the recent rain events and frost management have caused you to notice consistent waterlogged areas on the bog. Before applying any chemicals, improve drainage.

Aside from today (which looks to be wet and warm), the 5-day forecast is still looking cool (in the 50s for highs).

Some observations from Marty: No other insects were seen, but a few weevils were detected on bog edges this past week.  For the foreseeable future - no days above 60 degrees F and lots of rain and frost, so it looks like there will be no good sweeping days.  Be aware, however, that...

Not much has changed since last week.  The weather has been either cold or wet or both.  Bud development has been slow to progress.  The below is similar to what I reported last week, just briefer.

The Preliminary Keeping Quality Forecast is FAIR; we got 3 out of 10 points.  Based on the preliminary forecast, fruit rot fungicide applications and the rate of fungicides applied for fruit rot control should not be reduced....

Although the Station buildings are not open, we are “open for business” and accessible by phone or email (https://ag.umass.edu/cranberry/faculty-staff...

Chart Book updates are going in the mail today April 10 by both email and snail mail.  If you need a new Chart Book, contact Krystal at

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