Abstract
Abstract Banks grass mite (BGM) plots were 2 50-ft swaths ca. 2500 ft in length on a field of corn (Lynks 4355) under center pivot irrigation. Treatments were applied pretassel on 18 Jul. Liquid treatments were applied by a Cessna 188 Husky with a 50-ft wingspan. The 40-ft spray boom was equipped with D-1245 nozzles calibrated to deliver 2 gal water per acre at 28 psi at 120 mph. Granular treatments were applied with a Translander granule spreader with a Translander Finger metering system. Flying speed was 110 mph. Twospotted spider mite (TSM) plots were each ca. 7 acres on a furrow-irrigated corn field (NC + 6190 and Dekalb 699). Treatments were applied posttassel on 4 and 5 Aug. Liquid treatments were applied by a Pawnee PA-25 with a 36-ft wingspan. The 28-ft spray boom had D-8 nozzles calibrated to deliver 2 gal water per acre at 30 psi at 105 mph. Granular treatments were applied with a Piper factory equipped granule spreader with a Duke electric drive metering system. Spider mite infestations were rated 1 to 6 on a per leaf basis. A rating of 1 = 0 mites, 2 = a few mites, 3 = a few colonies, … 6 = leaf densely covered with mites. Apparent % control was determined by the formula given in the table.
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