To identify grape cultivars adapted to Iowa, a cultivar by management system trial was established in 2002 at the ISU Horticulture (Hort) Station and the ISU Armstrong Research Farm with the help of a grant from the Leopold Center of Sustainable Agriculture. Fifteen cultivars, including 10 wine and 5 seedless table cultivars, were evaluated under 1) a conventional management system that relies on herbicides for weed control and application of insecticides and fungicides on a regular basis; 2) an IPM/best management system that uses herbicides as needed and relies on monitoring to determine the need for insecticides and fungicides; and 3) an organic-approved system that relies on a straw mulch for weed control and the use of organic-approved insect and disease control strategies. This report summarizes the results for the 2005 growing season.
Iowa State University
Domoto, Paul A., "2002 Leopold Grape Cultivar by Management System Trial" (2006). Iowa State Research Farm Progress Reports. 1050.