Vulpia myuros (L.) C.C.Gmel (Rat's-tail Fescue) - A Problem Weed in the Rape Crops of Our Country

摘要

The fact that in a number of locations in Giurgiu, Dambovi?a and Arges County rape crop was severely affected by the presence of the Vulpia myuros species this spring, has led us to take the survey and analyse the premises that favoured the species installation and development. Soil samples and Vulpia plants were taken to establish their characteristics. Soil features correspond to the ecological requirements of the species. The morphometric values recorded on field plant are exceeding the data recorded in the literature. Any herbicide used had no effect on Vulpia plants growth. The establishment by direct seeding of rapeseed crops and bare spots in the field were the precondition for the installation and propagation of Vulpia myuros plants that caused severe harvest decrease.