Allelopathic effect of weed extracts on vegetable seeds

Protection of cultivated agricultural crops from weeds is one of the most important tasks of soil management as a science. Weed control is mainly dependent on the use of synthetic herbicides. The treatment of crops with herbicides inhibits and destroys not only weeds, but inhibits the growth and development of cultivated plants, and also affects the safety of crop production. Weed growth can be suppressed by the plants’ allelopathic effects. As a form of plant interaction in plant cenoses, allelopathy is a cycle of physiologically active substances (colins), which regulate internal and external relationships, renewal, development and change of vegetation cover in biogeocenosis. In agrophytocenosis, both cultivated and weed plants can be donors of physiologically active substances. The article presents the results of studies on the allelopathic effect of weeds on the germination energy and laboratory germination of beet and carrot seeds. It was found that extracts from Capsella bursa-pastoris Medic and Sonchus arvensis L . had the maximum inhibitory effect on the germination of carrot seeds at a concentration of 10%. An average allelopathic activity on the beet seeds’ germination energy was produced by extracts from Sonchus arvensis L . at concentrations of 5% and 10%. Seed germination ranged from 50.5 to 65.0% depending on crop varieties.