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Downy Mildew

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Metadata
Show full item recordAuthor
Lorbeer, James; Andaloro, John
Abstract
Downy mildew (DM) attacks onions in many parts of the world. It can become severe on leaves of commercially grown onion plants and on leaves and seed stalks of onions grown for seed, especially when relatively cool, moist weather prevails. Other reported hosts are shallot, leek, garlic, and chive. In muckland onion growing areas in the Northeast, DM generally is not detected until mid-to late July. DM rarely, if ever, occurs in growing areas with a warmer climate presumably because of relatively warmer night temperatures during May and June.
Description
NYS IPM Type: Vegetables IPM Fact Sheet
Date Issued
1984Publisher
New York State IPM Program
Subject
Agricultural IPM; Vegetables; Onions
Type
fact sheet