Effect of Oil Adjuvants and Nitrogen Fertilizer on the Efficacy of Imazethapyr Applied at Conventional and Ultalow Spray Volumes

摘要

Field experiments evaluated pitted morningglory, velvetleaf, and barnyardgrass control in soybean with imazethapyr applied alone and with either crop oil concentrate at 1.0/100 v/v, a blend of methylated seed oil and organosilicone surfactant, or a blend of methylated seed oil, phospate esters, and organosiliceon surfactant at 0.5/100 v/v, each with and without a 28/100 N mixture of urea and ammonium nitrate (URAN) applied at 2.3 L/ha.