Crop injury, weed control and yield in Roundup Ready sugar beet with soil-active herbicides and generic glyphosate

摘要

A field experiment was conducted at the University of Idaho Research and Extension Center near Kimberly, Idaho to compare generic and proprietary glyphosate applications alone and in combination with soil-active herbicides. Experimental design was a randomized complete block with four replications. Soil type was a Portneuf silt loam (17.9% sand, 61.8% silt, and 20.3% clay) with a pH of 8.0,1.7% organic matter, and CEC of 21-meq/100 g soil. 'BTSCT 01RR07 sugar beet was planted April 14,2007 in 22-inchrows at a rate of 57,024 seed/A. Kochia (KCHSC), common lambsquarters (CHEAL), redroot pigweed (AMARE) and green foxtail (SETVI) were the major weed species present. Herbicides were applied broadcast with a C02-pressurized bicycle-wheel sprayer calibrated to deliver 15 gpa using 8001 flat fan nozzles.