Yellow nutsedge (Cyperus esculentus L.), a Cyperaceae species, propagates exclusively with tubers in the ground. Its abundance in Switzerland has largely increased in the last 20 years, due to changes of land use and important difficulties to control. The species is not well known to farmers yet, and tubers are increasingly displaced by vehicles, machines, root crops and with shoes. Infested fields are not mapped yet. Effective strategies to control the weed in the sense of reducing tuber production and therefore reducing contamination of neighboring fields are missing. Agroscope started recently a trial programme for development of control strategies. A legal obligation to announce foci and to control would help farmers, contractors and purchasers of crops to coordinate actions for preventing tuber production and displacement.
Tuta absoluta is one of the most destructive pests of solanaceous crops. Agroscope has developed a statistical model to study the population dynamics of the pest and its parasitoids and allows interventions to be optimally planned.
Swiss vineyards are often small and arranged in a mosaic of separate plots and management practices. Therefore, it can be assumed that spray drift from conventional to organic vineyards occurs regularly. Nevertheless, no pesticide residues are detected in most organic wines.
Nay M.M., Grieder C., Frey L.A., Amdahl H., Radovic J., Jaluvka L., Palmé A., Skøt L., Ruttink T., Kölliker R.
Red clover is one of the most important legumes in European forage production. In a multi-year field trial, researchers tested Europe’s largest collection of different red clover accessions at five European locations.