Abstract
Field studies were carried out in 2017–2019 in Research and Education Centre Brody, Poznań University of Life Sciences, in order to assessment the impact of tested adjuvants on weed control in sugar beet. Treatments included phenmedipham + ethofumesate at recommended quantity (F + E, 200 + 200 g/ha) + metamitron (M, 700 g/ha) and phenmedipham + ethofumesate at reduced quantities (140 + 140 g/ha) without or with tested methylated seed oil (MSO 1, 2, 3) and standard adjuvants. Herbicides were applied three times after weed emergence. MSO adjuvants were more effective to F + E + M applied at reduced rates than standard adjuvants. The MSO adjuvants made it possible to obtain high and stable herbicidal efficiency of herbicides, regardless of varied weather conditions during and after their application. The root yield of sugar beet after application of herbicides with test adjuvants was higher than on the control and after application of reduced rates of herbicides without adjuvants.
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