First a quick note about our website, it’s in the process of getting some updates installed so this week we are attaching the full report to this email while the website is down. In the past week with the increased precipitation in the
region, we are seeing some pests begin to increase in severity and a very important disease being reported in and around the region.
Some of the highlights are below:
Spotted Wing Drosophila are being found in the region and the expectation is that populations will begin to spike with the increased moisture. Flies are being found in traps throughout the northeast including Vermont. However, trap counts have
been variable and this is likely due to the variability in the surrounding landscape of individual farms. Regardless, we suspect that we will see a bump in SWD numbers in the coming week.
You can see an interactive SWD trap map
- Leek moth adult numbers are still very high
and in some areas we are seeing very high trap counts of 50+ moths per trap. As many growers are harvesting garlic, if you suspect that you have high leek moth pressure, as evidenced by damage in scapes or leaves, you may consider topping/trimming your
garlic to remove any eggs before bringing your plants into curing spaces. Here is a link to Crystal Stewart-Courtens' work on post harvest treatment in garlic for your review:
post harvest results . According to Crystal's work, "[trimming] pruning length
did not affect the dried weight of bulbs significantly. Furthermore, there were no significant differences in disease incidence across any of the trimming treatments."
- Squash vine borer moths are being observed throughout the region, and in some cases in very high numbers.
Swede midge damage is being seen in greater frequency in broccoli and kale crops.
Cucurbit downy mildew risk is high in the region with known occurrences in NY and New England, Vermont growers are also at high risk of pathogen spread throughout most of the region. See:
Downy Mildew Forecast
For more information on the individual pests we found this week, please see the attached document. For detailed management information about these pests, as well as a comprehensive guide to current production and pest management techniques
for commercial vegetable crops, check out the
2020-2021 New England Vegetable Management Guide.
And, as always feel free to reach out to us if you have any questions. ([log in to unmask] &
[log in to unmask])
Vic and Scott
Scott A. Lewins
Entomology Extension Educator
UVM Extension NW Crops & Soils Program
Agroecology and Livelihoods Collaborative
University of Vermont
117 Jeffords Hall, Burlington, VT 05405