Weed control and crop tolerance to lactofen and thifensulfuron in soybeans at Lamberton, MN in 2002

摘要

The objective of this study was to evaluate the effect of two rates of thifensulfuron tank-mixed with lactofen and spray additives on crop tolerance and weed control in soybeans. This study was conducted on a Normania loam soil containing 4.2 percentorganic matter, pH 6.5 and soil test P and K levels of 60 and 316 lb/A, respectively. A randomized complete block design with four replications and a plot size of 10 by 30 ft was used. The site was planted to oats in 2001 and was fall chiseled. On May 17, 2002, Pioneer '92BO5' glyphosate-resistant soybeans were planted in 30-inch rows at a seeding rate of 160,000 seeds/A. The entire area was treated with clethodim at 0.125 lb/A for annual grass control. All treatments were applied with a tractor-mounted sprayer delivering 20 gpa at a pressure of 40 psi. The sprayer was equipped with 8002 flat-fan nozzles spaced 15 inches apart on the boom.