RESPONSE OF DIVERSIFIED DOSES OF HERBICIDE MIXTURE ON WEED CONTROL AND YIELD IN WHITE LUPINE

Abstract

Background. The chemical weed control method plays a fundamental role in clean cultivation of white lupine. However, due to the threats caused by the active substances of herbicides in the natural environment, safer methods of weed control for white lupine plants should be sought. Among others, through the possibility of using in-soil herbicides in reduced doses. Material and methods. A field experiment was carried out in the years 2014–2015, to evaluate the effect of herbicide mixture Dispersive Afalon 450 SC and Command 480 EC (contain linuron and clomazone), applied in various doses, on weed control and yield of white lupine. Results. Application of in-soil herbicide mixture Dispersive Afalon 450 SC (linuron) + Command 480 EC (clomazone) in a mention the applied dose and a reduced by 25% dose decreased weed number and mass, as well as weed species diversity, which was reflected in an increased white lupine seed yield. In the experiment, no harmful phytotoxic effect of the applied doses of herbicides containing linuron and clomazone on the emerging plants of white lupine cultivar Butan was found. Conclusion. Doses of herbicide mixtures containing linuron and clomazone decreased by 25% made it possible to obtain relatively less weed infestation and provide a high level of white lupine seed yield. Dose reduction of the tested herbicides by 50% significantly affected the growth and yield conditions of white lupine.