Abstract
Abstract Plots were arranged in a randomized complete block design with 4 replications in Clay County, Nebraska. Each plot was 2 rows, 30 ft long (30 in centers). Plots were separated by 1 untreated row on each side and 1, 4 ft alley and a 15 ft wide untreated strip at each end. Granular insecticides were applied with a Noble metering device mounted on the planter or bicycle-wheeled carriage. Liquid insecticides were applied with a compressed air plot sprayer mounted on an International Harvester 140 tractor. Relative effectiveness of treatments was evaluated by counting live greenbugs on 10 plants selected at random from each plot until July 21 when 5 plants per plot were examined. Percent control was calculated by Abbott's formula.
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