CONTAGIOUSNESS AND VITALITY OF RAGWEED IN THE FIELD AGROPHYTOCENOSES
The author identified the distribution and vitality of quarantine ruderal ragweed in crops of winter wheat, winter barley, maize and sunflower, depending on the kind of cultivar. It was found, that ragweed in crops of cereals is the dominant plant, its populations during the vegetation of cultivated plants are thriving: the distribution of ragweed in the studied field agrophytocenoses was contagious, or group.