Analýza druhového spektra plevelů ve vybraných plodinách v podmínkách ekologického zemědělství

The bachelor thesis deals with the evaluation of the species spectrum of weeds in organic farming. The literary part focuses on harmfulness, utility, regulation and classification of weeds. The second part deals with the field trial of hokaido and alfalfa shoots. The analysis was carried out on the land of Agrospol Hrádek Plus, the cooperative. The counting method was used for the assessment. On the basis of the evaluation, the influence of the previous crop was determined, the most common weeds in the crops were defined. We assessed the mechanical intervention when using the weft. In the alfalfa the most frequent occurrence of the bark beetle, the white eagle, the creeping beak. In the hokaido squirrel, the most frequent weeds were: Echinochloa cruss-galli, Amaranthus retroflexus, Chenopodium album and Cirsium arvense