Herbicide performance with soil applied dimethenamid-P, s-metolachlor, and flufenacet in soybeans atLamberton, MN in 2003

摘要

The objective of this study was to evaluatesoil applied dimethenamid-P, s-metolachlor, and flufenacet for annual grass and annual broadleaf weedcontrol in glyphosate-resistant soybeans. This study was conducted on a Normania loam soil containing 4.9%organic matter, pH 5.1 and soil test P and K levels of 32 and 272 lb/A, respectively. A randomized completeblock design with four replications and a plot size of 10 by 30 ft was used. The site was planted to oats in2002 and was fall chiseled. On May 15, 2003 preplant incorporated treatments were applied and tilled twicewith a field cultivator set to till 3 to 4 inches deep and operated at 5 to 6 mph. The same day Croplan '1776’glyphosate-resistant soybeans were planted in 20-inch rows at a seeding rate of 160,000 seeds/A. In August,all plots were treated with esfenvalerate (Asana) for soybean aphid control. All treatments were applied with atractor-mounted sprayer delivering 20 gpa at a pressure of 40 psi. The sprayer was equipped with 8002flat-fan nozzles spaced 15 inches apart on the boom.