Evaluation of Herbicides for the Control of Yellow Nutsedge (Cyperus esculentus L.) and Johnsongrass (Sorghum halepense L.) Under Non-Crop Conditions

Yellow nutsedge (Cyperus esculentus L.) and Johnsongrass (Sorghum halepense (L.) Pers.) are two of the most difficult weeds to control mostly due their asexual reproduction. reproduces through underground tubers rhizomes. In addition, is a problematic weed because its competitive nature C4 carbon fixation pathway metabolism. It typically grows 1.8 2.5 m tall can severely reduce yields in corn, cotton, soybeans, other crops. Two separate field studies were conducted 2020 at Delta Research Extension Center Stoneville, Mississippi evaluate effectiveness various herbicides on yellow non-crop scenario. The experiments as randomized complete block designs with 7 11 herbicide treatments for Johnsongrass, respectively. All replicated three times. plots 4-m wide 6-m long 3-m alleys between replications. consisted trifloxysulfuron, bentazon, halosulfuron, halosulfuron + thifensulfuron, glyphosate, glufosinate, paraquat. included clethodim, quizalofop, fluazifop, cyhalofop, fenoxaprop, pinoxaden, clethodim glufosinate glyphosate. Glyphosate thifensulfuron provided only 77 72% by five-weeks after application (WAA). On hand, glyphosate 99 100% 4 WAA. regrowth evaluation was assessed 3-weeks experimental area mowed. regrew every treatment except which that no-regrowth.