Performance of s-metolachlor atrazine mesotrione CGA-154281 and s-metolachlor mesotrione CGA-154281 compared to other preemergence herbicide programs in corn at Rochester,MN in 2003

摘要

Theobjective of the trial was to evaluate the performance of s-metolachlor & atrazine & mesotrione & CGA-154281 and s-metolachlor & mesotrione & CGA-154281 compared to preemergence herbicides programsused for annual weed control in corn in southeastern Minnesota. The research site was a Lawler loamsoil, containing 2.8% organic matter, pH of 5.9 and soil test P and K levels of 57 ppm and 186 ppm,respectively. The previous crop was soybean. In the spring, the area was fertilized with 625 lb/A of Pellimeand 134, 23, 120 and 24 lb/A of nitrogen, phosphorus, potassium, and sulfur, respectively. Springtillage consisted of two passes with a field cultivator. The corn hybrid, DKC 47-10, was planted on April28, 2003, at a depth of 2 inches in 30-inch rows at a population of 32,000 seeds/A. A randomizedcomplete block design with four replications was used. Preemergence (PRE) treatments were appliedwith a tractor-mounted sprayer, delivering 20 gallons per acre at 32 psi using TurboTee 11002 nozzles.Evaluations of the plots were taken on May 20 and 29, and June 26, 2003. Application dates,environmental conditions, weed and crop stages are listed below.