Grape berry moth, spotted wing drosophila, and summer wrap-up

By Terence Bradshaw I had an email come in tonight that I imagine includes a question on many people’s minds. That is, as we near veraision (I saw my first Marquette changing color today), what do we need to worry about as far as spotted wing drosophila (SWD) is concerned? SWD (Drosophila suzukii) is an […]

Midsummer vineyard management

By Terence Bradshaw Sorry grape growers, you just received my comments on orchard activities for the immediate time being. The good thing, as my predecessor Dr. Lorraine Berkett used to say when discussion apples and grapes, is that it’s the same story with different characters. So, here we go with Act One: Weather has been […]

One (or two) more things to think about

By Terence Bradshaw I’ve received questions about a couple of questions about two different yet similar insect pests: grape tumid gallmaker (GTG) and phylloxera. Both of these insects cause galls that develop around larvae that feed on foliar (and fruit, in the case of GTG) tissue which can be quite concerning, but often are not […]

Post-heat wave vineyard management

By Terence Bradshaw It’s cooling off for a bit, time to think about activities in the vineyard. Thankfully, extreme heat isn’t good for most grape diseases, and the dry weather hasn’t been good for them either. However, berries are sizing up and bunch closure will be here before we know it, so we should consider […]

Spraying and hot weather

By Terence Bradshaw This is just a quick note to urge caution for anyone planning to spray grapes or apples ahead of the upcoming hot spell which is expected to start tomorrow. Meteorologists are calling already saying that this may be the most intense heat event seen in Vermont in recent history, particularly in terms […]

Vineyard management, June 25

By Terence Bradshaw Things haven’t changed all that much in Vermont vineyards since the last posting here. Despite the showers over this past weekend and a pretty good rain last Monday, the predominant weather feature has been dryness. That’s good for most diseases, and as we shift into the postbloom period, we need to also […]

UVM Farming Practices Panel, Tues June 26

By Terence Bradshaw Panel on Farming Practices Tuesday June 26, 6-8 PM Sugar Maple Ballroom, 4th floor Davis Center, University of Vermont Dissecting Competing Philosophies in Vermont Agriculture Organic – Maddie Kempner, NOFA-VT Conventional – Dr. Terence Bradshaw, UVM Plant and Soil Science Regenerative Agriculture – Corie Pierce, Bread & Butter Farm Permaculture – Keith […]

Immediate prebloom in grapes

By Terence Bradshaw Grape bloom is looming in many Vermont vineyards, and this is a critical time for disease and vine management. As we mention in our initial IPM strategy for winegrapes, all of the major diseases save for late-season fruit rots are sensitive to management right now. That means that fungicide applications should be […]

Early season vineyard management

By Terence Bradshaw Grapes are moving fast in Vermont vineyards, with most cultivars in the UVM vineyard at about 3” shoot growth. Shoot thinning now will give best results before the vines waste energy on growth that you won’t keep. We typically aim for 4-6 well-spaced shoots per foot of canopy, selecting for the most […]

Early season vineyard management

By Terence Bradshaw Buds have broken in Vermont vineyards and many vines are at 1-3” short growth. This brings up a few pest management considerations for your vineyards. Most cold-climate cultivars will not need disease protection until 5-8” of shoot growth, but any vineyards with heavy disease pressure last year may wish to begin earlier, […]