Corn (Field), Fall Armyworm Control on Field Corn, 1979

Eight insecticides were compared for effectiveness in control of fall armyworms. Field corn was planted June 22 in Goochland Co., VA. Treatments were arranged in a randomized complete block design with four replicates. Four row plots measured 50 x 12 ft in which the two center rows were used for analysis. All insecticides were applied to the whorl as a foliar application. Liquid formulations were applied using a 4-gal hand held sprayer operating at 40 psi and a rate of 20 gal per acre. Granular materials were applied in a 7-in band over the whorl. Treatments were applied July 26 and insect counts made 1 and 3 days post-treatment. Numbers of small (instars 1-3) and large (instars 4-6) larvae per plant were determined on each sampling date. Plants were selected at random and sacrificed to ensure proper counting of larvae. Data was analyzed using Duncan’s Multiple Range Test. Soil association was Congaree-Chewada. The field had a history of Furadan use.