Buckwheat is an orphan crop in Switzerland which has lately been gaining attention due to its gluten-free flour and the high biological value of its protein. In order to establish the conditions for conventional production of buckwheat, two pre-emergence and three post-emergence herbicides were tested as to their suitability for controlling weeds in this crop. The two pre-emergence herbicides, Dual Gold and Nimbus CS, generally exhibited very good control of dicots and grasses up to maturity. They also exerted a negative impact on the density of buckwheat, which did not, however, affect yield negatively. Betasana and Betam Combi RAL, both of which contained the active component ethofumesate, brought about a marked reduction in yield. This effect was a result of their phytotoxicity, as well as their delaying effect on growth and flowering time. The post-emergence herbicide Beetup, which was only moderately successful in controlling weeds, was nonetheless the only treatment bringing about a consistent yield increase of 2,8 dt/ha on average. The two herbicides Dual Gold and Nimbus CS were identified as being potentially promising for registration in Switzerland. In case of a registration of these herbicides harvesting could be made easier by means of direct threshing.
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.