Abstract
Abstract This test was conducted at the University of Nebraska Agric. Res. & Develop. Center, Mead, NE in a second-year stand of ‘Ranger’ alfalfa. Plots were 9 x 15 ft, arranged in a randomized complete block design replicated 4 times. A single application of 6 insecticides at various rates, was made on 12 May ‘86. Insecticides were applied with a C02 activated pressure sprayer calibrated to deliver 12.5 gal/acre at 20 psi and equipped with a 5.5 foot boom. Each plot was sampled 3 times, 1, 2, and 3 weeks post-treatment, by taking 5 sweeps per plot with a 15-inch dia insect net. Pre-treatment counts, made on the day of treatment in the border area surrounding the plots, averaged 61.1 alfalfa weevil larvae, 49.2 pea aphids, 0.7 potato leafhopper adults, and 0.7 alfalfa plant bug adults per 5 sweeps.
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