Abstract
Abstract ‘Pioneer 3147’ corn was planted on 25 Jun at the Highland Rim Experiment Station, Springfield. Eighteen treatments replicated 4 times were arranged in a randomized complete block design. Plots were 30 ft × 6 rows with 10 ft alleys between plots and blocks. Rows were spaced 40 inches apart with 37 plants/30 row ft. The 4 inner rows were treated and the 2 middle rows were evaluated for whorl damage and harvested for yield determinations. Liquid formulations were applied using 2.5 gal compressed CO2 sprayers at 30 psi and 30 gal/acre. Granular insecticides were applied with shaker jars. Insecticides were applied on 18 Jul when 90% of the plants were infested with an average of 1.33 larvae/plant. Whorls newly damaged by the fall armyworm (FAW) were counted on 25 Jul, 1 and 8 Aug. Ensilage yields were determined on 30 Oct at 60% moisture. Soil type was Dixon silt loam, 2-5% slope, pH 6.0.
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