20-Dec-17 Deborah Golino, Director: Foundation Plant Services On December 20, 2017, Foundation Plant Services (FPS) announced that Grapevine Red Blotch Disease, caused by Grapevine red blotch virus (GRBV), has been found in the Russell Ranch Vineyard (RRV). All affected vines (only five of 4,132 vines in RRV tested positive for GRBV) have been removed and destroyed. FPS is carefully monitoring …
UC IPM Advisor David Haviland recently shared some tips on mealybug control. The goal is to lower mealybug populations, prevent movement, protect the cluster and keep the vines compatible for biocontrol (especially postharvest). Some insecticides effective against vine mealybug include: Chlorpyrifos (delayed-dormant treatment), Buprofezin (best against crawlers), Spirotetramat (foliar applied/systemic in the phloem and xylem), and Neonicotinoids (some soil, some …
What the mildew? A perspective on another challenging year managing powdery mildew Dr. Walt Mahaffee, Research Plant Pathologist, USDA-ARS Horticulture Crops Research Unit There has been a lot of talk this season about powdery mildew pressure that has been difficult to manage. It might be easy to write off mildew management problems to fungicide resistance, since both FRAC 3 (DMI) …
As a throwback from American Vineyard’s Central Coast Grape Expo last year, now is the time to prepare our vineyards with the right tools to prevent trunk diseases from spreading in the vineyard. Watch this interview with international expert and emeritus Plant Pathologist at UC Davis Doug Gubler who shared some great insights.
Wine grapes in Sonoma County are going through veraison and the crop is progressing well. Watch this brief interview with Bill Hipp who talked about this year’s crop, from the perspective of his vineyard, and what he is doing to keep Pierce’s Disease out of the Vineyard.
With the early season rains and floods, many growers have wondered what kind of impact that might have had on rodent populations on the farm, and want to know how to manage them moving forward. Check out California Ag Network’s video interview with Wildlife Specialist Roger Baldwin from UC Davis to find the answers.
Terrence Wilson: Re repellent sprays, which ones? How close to harvest can they be used, and what...