Abstract
Abstract Rice was planted in Cowley silt loam at the Rice Res. and Ext. Cent., Stuttgart, AR. Plots for the CN 11-3877 10G preflood test were 5 by 15 ft. All other plots were 5 ft dia cm and enclosed by aluminum flashing to prevent water movement. Each test was arranged in a randomized complete block design with three replications and flooded 16 June. All the nongranular treatments were applied with an air powered single nozzle sprayer at rate of 58 gal/acre. Those applied with oil were mixed in Agridex with 0.2% Ortho X-77. Granular insecticides were applied by hand shaker. All plots were sampled for root-feeding larvae 7 and 8 July by taking five soil cores (9 cm dia by 7 cm deep) from the drill rows of each plot; they were processed by washing through a#40 US Standard testing sieve and floating the larvae out in brine.
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