Development of resistance of barnyard grass to herbicides used in rice crops in Primorsky Territory

Abstract

Annual surveys of the fields of the main rice-growing farms of Primorsky Territory were carried out, in which the herbicides Citadel 25, MD, Nomini, SK were used for a long time. As a result of monitoring surveys, seeds of 3 biotypes of Echinochloa weeds (E. crus-galli, E. occidentalis, E. phyllopogon) were collected. In the conditions of a vegetation house on the basis of the Far Eastern Research Institute of Plant Protection – branch of the A.K. Chaika Federal Research Center for Agrobiotechnology of the Far East, an assessment of the development of resistance of barnyard drass biotypes to herbicides used in rice fields of the Primorsky Territory was carried out. The cultivation of rice on rice for no more than 3 years and the exclusion of the most polluted fields from the crop rotation contributes to a temporary decrease in the stability of the E. crus-galli and E. occidentalis biotypes. There was a significant increase in resistance in the population of E. phyllopogon. The route survey of the fields of Primorsky Territory confirms the increasing dominance of this biotype in most rice-growing farms.