Evaluation of the performance of KIH-485 for weed control in corn at Potsdam, MN in 2003

摘要

The objective ofthis trial was to evaluate and compare the performance of KIH-485 at different rates to s-metolachlor&CGA-154281 for weed control in corn in southeastern Minnesota. The research site was a Port Byronsilt loam containing 3.2% organic matter with a pH of 6.7 and soil test P and K levels of 66 and 376 ppm,respectively. The previous crop was soybean. The area was fertilized in the spring with 160 and 120 lb/Aof nitrogen and potassium, respectively. Spring tillage consisted of one pass with a disk and a fieldcultivator. The corn hybrid, Syngenta NK45-A6, was planted on May 20, 2003 at a depth of 1.5 inches in30-inch rows at 32,000 seeds/A. A randomized complete block design with four replications was used.Preemergence (PRE) and postemergence (POST) treatments were applied with a tractor-mountedsprayer delivering 20 gpa at a pressure of 32 psi using TurboTee 11002 nozzles. Evaluations of the plotwere taken on June 5 and 16, and July 3, 2003. Application dates, environmental conditions, and cropand weed stages are listed below.