Colloquial name (also grass weeds) for various plants, which occur as spontaneous accompanying vegetation in cultivated plant stands or gardens. They are not cultivated specifically, but arise from the seed potential of the soil or via seed flight. The criterion for "weeds" is that such plants with a purpose-grown crop in terms of undesirable competition nutrients. water and kick light. By nature, there is no weed, too Rebstock in a rosary is undesirable. Common weeds in viticulture are Ackersenf, Ackerwind, Amaranth, Thistle, Common Wheatgrass, Common Fumitory, Shepherd's purse, Klettenlabkraut, Knötericharten, Dandelion, Pfeilkresse, Black nightshade, Chickweed and Willowherb. But even these can occur as a medicinal herb or pointer plant. The latter give evidence by their presence soil type and texture. These are z. B. sorrel (acid soil), Black Nightshade ( humose, loose soil) and chickweed (good nitrogen supply).
Especially young vines can be negatively influenced in growth and more pests and diseases occur. From bindweed Nettle and dandelion can phytoplasmas be transferred and the Blackwood's disease trigger. Excessive weed growth can too water stress and nitrogen deficiency to lead. Weeds are usually by Ausjäten, mechanically through Shredders or through herbicides fought. In controlling the propagation form of importance. The root weeds multiply over root remains, the seed weeds exclusively via seeds. Sustainable success is possible with the seed weeds, if they are eliminated in time before the semen release. Field winds, goose thistle, common couch grass and dandelion can only be effectively combated if the roots are dug. in the Organic viticulture weeds, on the other hand, are considered an integral part of ecosystem regarded neutrally as "weedy" and today tolerated to some extent. You can even partially certain functions of a greening like protection before erosion and better ground accessibility.