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Vegetables
Volume 58 Number 3 Date 05/16/2013 ONION MAGGOT - Flies of the first and most damaging generation will begin emerging next week in southern Wisconsin. Cultural controls, including removal of onion cull piles and crop rotation, are increasingly important now that the onion maggot has developed resistance to many of the insecticides used as granular furrow treatments at seeding. Good sanitation is the best preventative measure. ASTER LEAFHOPPER - Migrants have been detected at low levels in alfalfa across the southern half of the state, indicating that vegetables and other susceptible hosts may be at risk of aster yellows disease next month. The aster yellows organism must be retained by the leafhopper for three weeks after being acquired before it can be transmitted to another host. Growers are advised to begin watching for symptomatic plants early in June. -- Krista Hamilton, DATCP Entomologist |
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