In two field experiments with mouldboard plough, cultivator and no-tillage, the harvested grains of winter wheat were analysed. We examined the degree of contamination with Fusarium and the content of deoxynivalenol (DON). Fusarium graminearum, F. avenaceum and Microdochium nivale were isolated from all samples. The highest incidence of disease (up to 42 % infection by F. graminearum) and mycotoxin content (up to 6 ppm DON) were observed in the no-tillage system with maize or wheat as preceding crop. Compared to no-tillage, mouldboard plough reduced the grain contamination with F. graminearum and the DON-content by 80 % (cultivator: 45 %). In no-tillage treatments, rape as previous crop reduced the F. graminearum incidence and the DON-content by 90 % compared to maize as preceding crop. These data confirm the importance of crop rotation and soil management to reduce the risk of contamination with Fusarium and DON under moist and warm weather conditions during the wheat flower period.
Herbicide-resistant weeds are a growing problem throughout the world. Monitoring herbicide resistance in Switzerland allows us to understand the mechanisms behind it and to better manage the use of herbicides.
Agroscope compared crop protection strategies in apple production. Reducing the use of plant-protection products lowered the local ecotoxological risks, but resulted in trade-offs between environmental and economic performance.
Bacillus thuringiensis (Bt) bacterium proteins protect Bt maize from being fed on by specific insects. A new, systematic analysis of international field data confirms that non-target organisms in Bt maize are largely spared.