Adjuvant improves performance of pre-emergence residual herbicides in cereals

摘要

Previous studies have reported that adjuvants can enhance the performance of pre-emergence residual herbicides in a range of broadleaved crops by reducing spray drift, improving spray deposition and reducing leaching. This paper reports a trial investigating the effect of the adjuvant HM 9679-A on the efficacy of five pre-emergence herbicide treatments applied via four nozzle types on the control of blackgrass (Alopecurus myosuroides). The addition of HM 9679-A to each of the five herbicide treatments significantly reduced the number of blackgrass plants assessed 43 days after application. This effect was maintained after the application of a standard post emergence herbicide. The number of blackgrass heads/m2 recorded in the following spring, 273 days after the pre emergence treatment, was reduced in comparison to the herbicide alone.