Insects.
If you have evidence of an active Vaccinium Scale infestation, spray ASAP!!
Based on observations at several scale infested sites, crawlers are being released the time to manage these insects (with Diazinon) is now! The June 15th timing for the spring population is the most effective, but if you have an active infestation now, you will see significant damage before then. Late water in the spring is also option to manage scale.
The rate for Nexter (used to control for Southern Red Mites) is lower for chemigation!
Southern red mite is tiny and new outbreaks have only been reported recently, probably after use of the broad-spectrum Fanfare and the many days of hot weather. Mite injury appears as stippling on the leaf’s upper surface. It has been some time since we have seen red mite outbreaks. Here is a link to the quarter-century-old fact Cranberry Station fact sheet
https://ag.umass.edu/sites/ag.umass.edu/files/fact-sheets/pdf/southernredmite-ua.pdf
If chemigating Nexter or Nexter SC to manage southern red mites, please observe the labeled chemigation rate! The range listed in the Chart Book is for ground application. Specifically, upon review of the Gowan label, rates for chemigation are lower than rates for ground application (for both formulations). This is not noted in the Chart Book! We’ve never seen this on a product label before. But the label is the law, so for “regular” Nexter, ground apps have a 4.4 to 10.67 oz rate and chemigation has a 3.5 to 7 oz rate. For Nexter SC, ground apps have a 7.5 to 17 oz rate and chemigation has a 5.6 to 11.2 oz rate.
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Nexter pyridaben |
* 3.5 -7.0 oz/A by chemigation (4.4 – 10.67 oz/A by boom or other ground rig)
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2 apps/season. Ground and chemigation only – no aerial application. Hold water for 3 days after application. No flow-through bogs. 5 hours of drying time required.
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Nexter SC pyridaben |
*5.6 – 11.2 oz/A by chemigation (7.5-17.0 oz/A by boom or other ground rig) |
Other notes.
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.
