Field Corn, Fall Armyworm Control in Whorl Stage Field Corn, Conventional Tillage and No Tillage, 1986

Abstract

Abstract Field corn was planted 11 Aug at the University of Georgia Experiment Station, Oconee Co., in Cecil coarse sandy loam soil. The experiment was a randomized complete block design with 2 row plots × 20 ft long × 38 inch row width × 3 ft alleys with 5 replicates. Plants were treated with a full cone spray using an air pressure sprayer at 30 psi in a final volume of 25 gal/acre directed into the whorls of seedlings. The test was sprayed twice, 19 and 26 days after planting. Plant damage ratings were made 48 and 61 days after planting using a 0 to 7 damage index of the following: 0, no damage; 1, slight leaf feeding, but no indication of bud damage; 2, moderate leaf feeding, but no bud damage; 3, heavy leaf feeding, and no bud damage; 4, slight to moderate feeding, and slight bud damage; 5, moderate to heavy leaf feeding damage, and moderate to heavy bud damage; 6, heavy leaf feeding, and severe bud damage; and 7, plant virtually destroyed.