Cirsium arvense - problematic weed in organic farming
2002
Lauringson, E. | Talgre, L. | Kuill, T. (Estonian Agricultural Univ., Tartu (Estonia). Dept. of Field Crop Husbandry)
C. arvense is a weed that causes a lot of problems in plant growing. Its great viability is caused by remarkable reproductive capacity based on the dynamics of the content of a polysaccharide called inulin in its roots. Controlling C. arvense requires systematic and precisely timed measures. The best grass plant to control C. arvense is alfalfa, also rye grass and clover sown under the crop. Red clover cultivated for two years helped to control the weeds during the whole trial period. Such an influence of red clover over the distribution of C. arvense can be explained by red clover being harvested before weeds can start intensive storage of reserves. Agrotechniques used to cultivate potato and summer grain crops will not offer the option of influencing storage of reserves of C. arvense. The most effective method in controlling C. arvense in various crop rotation systems was periodically executed deep ploughing (24-25 cm).
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