In the trial «Chaiblen» at Tänikon (Switzerland), the effect on yields and economical parameters of a diverse, a cereal-dominated and a maize-dominated crop rotation was examined during 27 years. The evaluation of the years of comparison with silage maize and winter wheat in the three crop rotations showed, that a diverse crop rotation with two years of clover grass had a better yield potential and an easier control for weeds and diseases than the rotations mainly based on cereals or maize. On average, maize yielded 19 % less in the maize-dominated rotation and wheat 10 % less in the cereal-dominated rotation than in the diverse crop rotation. Furthermore, earthworm populations showed a clear increase during the two years of meadows in the diverse crop rotation. This was in contrast to the other crop rotations with almost unchanged numbers of earthworms.
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.