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Pest/Disease Management

Reconsidering Dormant Lime Sulfur Application for Upper Midwest Vineyards

For some grape growers, the first pesticide application of the season is lime sulfur shortly before bud swell. Others skip lime sulfur and start the season with a bud break fungicide application. So does skipping lime sulfur result in less disease control? Well, that depends on the disease you are trying to manage. Dormant lime sulfur can be applied right …

Grape Leaf Rust Spreading Across the Southeastern States

The Missouri Department of Agriculture – Plant Pest Control Program has tentatively identified Grape leaf rust on grapevines located at retail outlet. This is the first report of Grapevine Leaf Rust that I am aware of for Missouri. The disease has been reported in southeastern states including North Carolina, South Carolina, Georgia and Florida. In 2018, Tennessee reported Grape Leaf …

Cross Resistance to Insecticides Develops in Fruit Flies in Missouri Vineyard

Almost two–years ago I reported on the development of fruit flies developing cross–resistance to three insecticides in New York state. Fruit flies developed cross–resistance in a New York vineyard after 3–years of use of Mustang Maxx to control fruit flies. Fruit flies were collected from this vineyard after it was noticed that Mustang Maxx had failed to control fruit flies. …

What Growers Need to Know about Sudden Grapevine Collapse

Sudden Vine Collapse is a disease complex that has become a lot more widespread across California than was previously thought. First coined by growers as Mystery Vine Collapse, researchers now have some answers.  Watch this brief interview with UC Davis Plant Pathologist Akif Eskalen to find out more and read about it in American Vineyard Magazine.   Please thank this …

American Vineyard February Issue

American Vineyard February Issue

Contents of the February Issue: Better Things to Come in the Wine Industry Stasi Seay of Hope Family Wines Navigates Through Challenges Spotted Lanternfly Invasion A Colorful Cause for Concern The Sun will Shine Again on the Raisin Industry Sun-Maid Growers Boast Record Sales The American Grapevine Grape Industry News Briefs Alabama California Florida Minnesota New Mexico Oregon Washington

New Synthetic Antimicrobial Peptide Aptamer Targeting Causal Agent of Grapevine Downy Mildew Identified

Dr Chiara Mizzotti, Research Technician at the Università degli Studi di Milano, (Italy) writes about the latest research by the GrAptaResistance team, published in Scientific Reports. Grapevine: economic and agricultural valueGrapevine (Vitis vinifera L.) is a crop of great economic and agricultural value throughout the world. In 2019, the International Organisation of Vine and Wine (OIV) reported that over 7 …

Ultraviolet Light as an Integrative Pest Management Tool for Grape Powdery Mildew

Oregon Wine Research Institute — The concerning emergence of fungicide resistant grape powdery mildew (Erysiphe necator) to numerous fungicides, has led to a need for new integrative pest management strategies in grape production. Ultraviolet spectrum C (UVC) radiation has been used for over a century to kill or disable microorganisms by damaging their DNA. However, prolonged exposure times have been …

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