Influence of Adjuvants on Itchgrass (Rottboellia cochinchinensis) Control in Corn (Zea mays) with Nicosulfuron and Primisulfuron¹

Abstract

In field experiments, nicosulfuron at 35 g ai/ha controlled itchgrass in corn 28 d after treatment better than primisulfuron at 39 g ai/ha (80 vs. 44%). Control with both herbicides was greater when applied to six-leaf itchgrass than to 10-leaf and with the addition of nonionic surfactant than with an organosilicone surfactant and methylated seed oil blend. Weed control for nicosulfuron plus nonionic surfactant resulted in corn yield approximately 1.5 times that of primisulfuron plus nonionic surfactant and 1.6 times that of nicosulfuron plus an organosilicone surfactant and methylated seed oil blend. When primisulfuron was applied with organosilicone surfactant and methylated seed oil rather than nonionic surfactant, corn yield was reduced by 25%. For nicosulfuron with nonionic surfactant, corn yield averaged approximately twice that of the nontreated check. In other field experiments, itchgrass control 28 d after treatment with nicosulfuron was enhanced with addition of an organosilicone and nonionic surfactant blend or methylated seed oil (83 and 78%, respectively) compared with nonionic surfactant (69%). Nicosulfuron was less effective when applied with crop oil concentrate or organosilicone surfactants compared with nonionic surfactant.

Influence of Adjuvants on Cotton (Gossypium hirsutum) Response to Postemergence Applications of CGA 3626221

“…Nicosulfuron controlled itchgrass [Rottboellia cochinchinensis (Lour.) W. Clayton] more effectively when applied with NIS than when applied with COC or OSS (Strahan et al 2000). Wells et al (2001) recommend that CGA 362622 be applied with 0.25% (v/v) NIS.…”

Response of Johnsongrass Biotypes from Humid and Subhumid Regions to Nicosulfuron in Argentina

“…Nicosulfuron is classified as a sulfonylurea herbicide currently registered for post‐emergence control of grass and broadleaf weeds in corn (17) and this herbicide was among the ten most traded in Argentine markets due mainly to the good control of Johnsongrass (11).…”

Eficiência e qualidade da aplicação de misturas em tanque com adjuvantes na dessecação de corda-de-viola

“…A adição de adjuvantes à calda de herbicidas, na maioria das vezes, visa ao aumento da área de cobertura, porém nem sempre maior área de cobertura reflete em maior eficiência biológica (STOCK & BRIGGS, 2000). STRAHAN et al (2000) relataram que o uso de adjuvantes não influenciou significativamente na eficiência do herbicida nicosulfuron sobre Rottboellia cochinchinensis.…”