The effectiveness of herbicides for combating bread windgrass on winter wheat in the Ryazan region

Abstract

Herbologists have calculated that in an integrated system for protecting crops from weeds, diseases and insect pests, up to 30% of productivity can be saved by treatment with herbicides. One of the most malicious and hard-to-eradicate weeds that infest winter wheat sowings is the bread (field) windgrass (Apera spica-venti L.). There have been presented the results of 3-year trials of post-sprouting herbicides ‘Puma Super 100, KE’ (100 g/l fenoxaprop- P-ethyl + 27 g/l antidote mefenpyr-diethyl) and ‘Aksial, KE’ (45 g/l pinoxaden + 11.25 g/l antidote clokvitoset-mexil), used on winter wheat sowings to reduce weediness with windgrass and to increase wheat productivity. The purpose of the study was to identify biological and economic efficiency of these products and to assess their effect on the phytosanitary state of winter wheat sowings. The conducted estimation of the herbicides’ utilization in the protection of winter wheat from the windgrass identified their efficiency in reducing the contamination of sowings from 89 to 100% and in increasing wheat productivity. The use of herbicides in a period of spring tillering contributed to the improvement of phytosanitary state and an additional yield of winter wheat grain from 0.25 to 0.46 t/ha.