Abstract
Abstract A study was conducted at the St. Gabriel Research Station, Louisiana r Agricultural Experiment Station, Louisiana State University, St. Gabriel, LA to evaluate the efficacy of several insecticides on fall armyworm on sweet corn.! Sweet corn of the cultivar ‘Jubilee’ was planted on 38-inch rows with a plant spacing of 12 inches. Plots were arranged in a randomized complete block design with 4 replications of single row plots 10 ft in length. Pesticides with a liquid formulation were applied to the whorls with a hand-held C02 pressurized ·prayer delivering 30 gal/acre at 40 psi through a single hollow cone spray nozzle containing a D-3 disc, No. 25 core, and 16 mesh strainer. Granular pesticides were applied by hand into the whorls. Treatments were applied on 11 and 25 Sep. A damage index was used to quantify fall armyworm damage. The number of holes > 0.04 sq. inches present on each leaf above the ear (7-8 leaves) were counted on 5 plants in each treatment. The mean number of holes per leaf was calculated and served as an index of fall armyworm damage.
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