Eriochloa villosa in the Primorsky Territory of Russia and the search for soil herbicides to combat it in soybean crops

Abstract

The work analyzes the results of monitoring the weed field flora of the Primorsky Territory. A tendency has been revealed to increase the occurrence and density of the woolly cupgrass Eriochloa villosa (Thunb ex Murray.) Kunth, which is difficult to control due to a number of competitive biological advantages and morphological features that determine its resistance to many herbicides. In experiments conducted in 2021–2022. in the Far Eastern Scientific Research Institute of Plant Protection, it was revealed that according to the main indicator -a decrease in the wet above-ground mass of experimental weed plants compared to the control, the most effective herbicides were Dual Gold 1.6 l/ha, Proponit 3.0 l/ha and tank mixtures Dual Gold 1.5 l/ha + Gesagard 2.5 l/ha, Dual Gold 1.5 l/ha + Zenkor Ultra 0.5 l/ha, Dual Gold 1.5 l/ha + Command 0.7 l/ha.