Perennial sow-thistle

Last changed: 06 December 2023

Development of management strategies

Project manager: Anneli Lundkvist, Department of Crop Production Ecology, SLU.

Regulation of perennial weeds like sow-thistle (Sonchus arvensis L.), creeping thistle (Cirsium arvense (L.) Scop.), and common couch (Elymus repens (L.) Gould) is one of the greatest challenges in organic farming. In northern parts of Sweden in particular, S. arvensis has become one of the most difficult perennial weeds to control on organic farmland. Several studies have been performed on how to control C. arvense and E. repens. However, fewer experiments have been performed on S. arvensis and much research remains to be done in this area, for example detailed studies in a controlled environment on the influence of competition from crops in combination with mechanical control on the growth and development of S. arvensis.

In the experiments planned here, we are therefore going to study how S. arvensis is affected by various crops, cultivation techniques and mowing. 

The aim is to develop more efficient weed control methods for S. arvensis in organic farming.