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Volume 7 • Issue 4 •  May 20, 2022

Early Season Vineyard Tasks

After last week’s extremely warm weather, grapevines got enough heat to break bud and we are already seeing 2 to 3 inches of growth on the new shoots. I would anticipate that we will be in bloom in southern Wisconsin in the next 10 to 14 days. To make sure we start this new growing cycle in the best possible way, here are a couple of tasks to get done during the early season.

Grape Plume Moth

Grape plume moth may start showing up in vineyards soon, though it is a sporadic insect in vineyards in the Midwest. The characteristic injury is caused by the larvae webbing together the terminal leaves on a shoot to protect themselves from predators and parasitoids while feeding on the tender leaves. Peak infestation usually occurs around the end of May into early June in southern Wisconsin. Learn more here.

Promoting Flower Bud Formation in Honeycrisp—the Time Is Now

Honeycrisp starts flower formation really early in the season and by the time fruits are 30 to 36 mm in diameter, which corresponds to about 45 days after full bloom, buds have already formed flowers for next year. How do we ensure good return bloom for next year? Read more here.

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Editors: Josie Russo, Amaya Atucha, Christelle Guédot, and Leslie Holland 

References to products in this publication are for your convenience and are not an endorsement of one product over similar products. You are responsible for using pesticides according to the manufacturer's current label directions. Follow directions exactly to protect the environment and people from pesticide exposure. Failure to do so violates the law.

Wisconsin Fruit Team Contact

Amaya Atucha
Extension Fruit Crop Specialist

Jed Colquhoun
Extension Fruit Crops Weed Scientist

Christelle Guédot
Extension Fruit Crops Entomologist

Leslie Holland 
Fruit Crop Pathology Specialist

Josie Russo
Communication Specialist

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