Abstract
Abstract Two insecticidal treatments were evaluated to determine their efficacy in controlling cereal leaf beetle larvae in spring-planted oats. Insecticides were applied at peak oviposition on May 7 at the Russell Settle Farm near Warsaw, VA. A randomized block design was utilized with 4 replications. Individual plots were 12 × 50 feet with 3-foot alleys. Each spray concentrate was applied to the oat foliage with a CO2 compressed air sprayer at 22 psi with Flat Fan, Tee Jet AL8002 nozzles that delivered 11.7 gal of finished formulation per acre. The efficacy of individual treatments was determined 1-, 3-, 7-, and 14-days after application by inspecting whole plants for the presence of live larvae per 10 culms. The leaf area and percent defoliation of the flag, second, and third leaves was determined on Jun 4 by clipping whole plants and immediately measuring each leaf with a Li-Cor LI-3000 area meter. The 2 center rows of each plot were harvested for yield estimates, which were adjusted to 14% moisture.
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