Phytosanitary state and protection of winter coleseed against harmful organisms

Abstract

The article presents the results of monitoring the phytosanitary state of winter coleseed cultivated in the republic. It’s established that annual dicotyledonous species predominate in weed cenosis of the crop. Alternaria, sclerotinia, phomosis and occasionally powdery mildew are observed among the diseases. Rapeseed flea beetle, stem pod gnat, rapeseed flower beetle, seed pod gnat and cabbage pod gnat are the most common phytophages. In the field experiments, the research was conducted on the efficiency of plant protection products against dominant species of pests. It was established that as a result of protective measures, the number of annual dicotyledonous weeds decreased by 68.3–87.7%, the number of rapeseed flower beetle – by 83.0–86.3%, and seed secrecy beetle – by 66.1–84.5%. The use of disinfectants for protection of winter coleseed from micromycetes showed their high inhibitory activity at the level of 84.6–100%, as well as suppression of infection at the initial stages of ontogenesis of the crop with a reliably preserved seed yield. The biological efficiency of the fungicide Amistar Gold, SC against sclerotinia was 68.3–91.8%, Alternaria – 70.5– 88.8%.