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Selected insecticides were evaluated for control of RSB, BFL and grasshoppers at the Rice Research Station, Crowley, LA. Plots, 5 X 20 ft, were arranged in a randomized block design with four replicates and six treatments. Fertilizer was incorporated pre-plant and applied broadcast 12 wk post-flood at 100 lb (13-13-13) and 50 lb (21-0-0) N-P-K/acre respectively. Plots were drill-seeded to Crowley silt loam with ‘Cyprus’ rice at 100 lb seed/acre on 1 May and permanently flooded 21 Jun. Foliar applications of the insecticides were made on 23 Jul using a CO2 backpack sprayer delivering 15 gpa at 28 psi with 110015 VS flat-fan nozzles on a 3 ft boom. A standard 15 inch diam sweepnet was used to collect samples (18 sweeps per plot) beginning on 23 Jul and continuing weekly for 3 consecutive wk. Individual sweepnet samples were placed in a plastic bag, frozen, and the contents counted for total number of RSB, BFL, and grasshoppers. The center 4 rows of each plot were harvested on 11 Sep using a Kubota combine. Moisture content of harvested grain was determined and then standardized to 12% moisture for calculation of yield. Pecky rice injury was expressed as a percentage of injured seed found in three 100-seed subsamples per plot. Sample data were subjected to ANOVA. The experimental and sampling error terms for the pecky rice data were tested for homogeneity of variances, and pooled error terms used to test the treatment effect when appropriate. All data were subjected to mean separation using the protected least square difference (LSD) procedure at P – 0.05.

Evaluation of Selected Insecticides For Rice Stink Bug, Blackfaced Leafhopper And Grasshopper Control, 1996