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I learned last week that the U.S. Environmental Protection Agency approved the use of higher rates of Fortress 2.5G and 5G insecticides for control of insect pests of corn. Fortress 2.5G can be applied at 6 to 7.5 ounces per 1,000 feet of row for control of cutworms, seedcorn maggot, white grubs, and wireworms, and at 6 to 9 ounces per 1,000 feet of row for control of corn rootworm larvae. Fortress 5G (applied only through the Smart-Box system) can be applied at 3 to 3.75 ounces per 1,000 feet of row for control of cutworms, seedcorn maggot, white grubs, and wireworms, and at 3 to 4.5 ounces per 1,000 feet of row for control of corn rootworm larvae. Before this recent change, Fortress 2.5G and Fortress 5G could be applied at maximum rates of 6 and 3 ounces per 1,000 feet of row, respectively. Although Fortress can be placed either in a band or in furrow, we recommend the in-furrow placement for control of corn rootworms, seedcorn maggot, white grubs, and wireworms. The band placement is preferable for control of cutworms. Both formulations of Fortress are restricted for use by certified applicators. Please follow all label directions and precautions.--Kevin Steffey
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