Influence of Roundup (Trade Name) with Adjuvants and Other Herbicides for Controlof Roadside Bermudagrass

摘要

Two tests each demonstrated the response of bermudagrass (Cynodon dactylon(Pers.)) on the roadside pavement edge and shoulder (1) to Roundup (glyphosate) alone and with 11 adjuvants and (2) with Arsenal (imazapyr) and Oust (sulfometuron). Treatments were sprayed in May and rated five times in the following 16 weeks. Researchers applied Roundup herbicide alone at 3.5, 4.7, 7.0, and 9.4 L/ha (1.5, 2, 3, and 4 qt/A) and at 3.5, 4.7, and 7.0 L/ha with 11 adjuvants including: Apsa-80, BioPlus, Cide-Kick II, Exacto XL, Kinetic, Raider-TG, Saturall 85, X-77, X-77+ammonium sulfate, HUK-12, and Agri-Dex. Bermudagrass control averaged 7% higher on the pavement than on the shoulder. Averaged over all adjuvants and ratings, Roundup rates at 3.5, 4.7, and 7.0 L/ha produced 49, 56, and 64% bermudagrass injury. Averaged over 38 treatments, bermudagrass injury was 54, 72, 73, 52, and 27% at 2, 4, 8, 12, and 16 weeks after treatment, respectively. Averaged over three Roundup rates and five rating dates, Apsa-80, Exacto XL, Kinetic, Raider-TG, Saturall 85, X-77+ammounium sulfate, and Agri-Dex increased bermudagrass control slightly from 57 to 62% compared with 53% with Roundup alone.