Grape Disease Risks: 6/3-6/10/2026 and Downy Mildew Forecast

Vine status Chardonnay vines have been growing nicely. I have noticed a lot of laterals, though. Made me wonder if something happened to the terminals (shoot tips) during the frost.… Read more

Grape Disease Risks 5/27-6/3/2026 and downy mildew forecast

Vine status The effect of rain finally kicked in. Chardonnay vines grew considerably over the last week. I started canopy management this morning. My goal is to keep a bit… Read more

Disease risks 5/21-5/27 and downy mildew forecast

Vine status Probably because of the cooler temperature, the vines did not move as much as I hoped. As with last week, many Chardonnay shoots do not bear flower clusters,… Read more

Disease risks from 5/13 – 5/20 and downy mildew forecast

Vine status Things are finally moving. I saw quite a few shots from the secondary (or tertiary) buds coming up strongly, especially from the central part of the canopy (i.e.,… Read more

Grape Disease Risks: 5/6 – 5/13/2026, downy mildew forecast, and pre-bloom disease management considerations

Vine Status Things are still slow, but moving. Our Chardonnay vines started to push secondary buds. On the other hand, some primary buds that survived the freezing events are developing… Read more

Grape Disease Risks from Last Week, and downy mildew forecast

Vine status It has not changed much from last week. Temperatures have been relatively low, and the shoot growth rate remains slow. However, I observed some improvements (e.g., growth from… Read more

Grape Disease Risks from the last week, Mancozeb and Isomate Z Updates.

Vine status I was hoping to see some progress by now, but since the temperature has been relatively low (or maybe normal for this time of the year), vines have… Read more

Frost, disease risks, and a downy forecast

Vine status Unfortunately, many of our vines were affected by the frost event yesterday. I have heard from Northern VA, the Shenandoah Valley, and Central VA, with varying degrees of… Read more

VA Grape Disease Risks: 4/8 – 4/15/26 and downy mildew forecast

Vine status Our Chardonnay vines have grown quickly and are now about ~2 inches in shoot length. We lost about 10-15% due to the frost event that happened on 4/8/2026.… Read more

Early Season Disease Management Reminders

Phomopsis cane and leaf spot One of the diseases you need to consider soon after bud break is Phomopsis cane and leaf spot. It causes minor leaf spots, which are… Read more
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