Sensitivity of Southcentral U.S. Johnsongrass Accessions to Selected Herbicides

• DOI: 10.1017/wet.2024.75
• Publication Date: 2024-11-13T11:23:52Z
• Authors: Jacob Fleming; Jason K. Norsworthy; Muthukumar Bagava...; Nithya Subramanian; Tom Barber; Misha Manuchehri; Vipan Kumar; Leonardo Piveta
• Keywords: 0401 agriculture, forestry, and fisheries; 04 agricultural and veterinary sciences

Abstract New technologies in grain sorghum allow for the use of multiple acetyl CoA carboxylase- (ACCase) or acetolactate synthase- (ALS) inhibiting herbicides johnsongrass control. With growing issue herbicide resistance, producers need to understand which will successfully control accessions. To determine efficacy recently registered ones with potential become available sorghum, seeds were collected from 2017 2021 Arkansas, Kansas, Texas, and Oklahoma screened sensitivity fluazifop, quizalofop, nicosulfuron, imazamox. Additionally, glyphosate was evaluated because its before planting postharvest. Quizalofop resulted 100% mortality all Of accessions evaluated, 89% completely controlled glyphosate. The ALS inhibitors nicosulfuron imazamox accessions, but failures occurred on samples other states. One accession 12 eight Arkansas found have reduced If plan plant areas populations, an ACCase-inhibitor most likely provide effective Imazamox conjunction appropriate trait, can be utilized sensitive populations where grass species are present.