Herbicide resistance is a worldwide industrial agriculture problem that worsens from year to year. In certain northern European countries, black-grass is resistant to numerous different herbicides, and can scarcely be controlled in certain places. This phenomenon is also starting to emerge in Switzerland. Starting in 2011, and in order to monitor the appearance of new resistances and control their spread, Agroscope set up a monitoring programme at national level. This programme is important for the local development of prevention strategies in partnership with the cantonal plant-protection agencies. In Switzerland, the weed species currently affected by resistances are three monocotyledons (black-grass, loose silky bentgrass and Italian ryegrass) and a dicotyledon (lamb’s quarters). These have developed resistances to five different biochemical modes of action, defined at international level by the Herbicide Resistance Action Committee (HRAC). To prevent the appearance of new resistances and to best contain those that have already emerged, it is important to combine both cultural and phytosanitary control methods.
Spring J.-L-, Zufferey V., Verdenal T., Reynard J.-S., Lorenzini F., Bourdin G., Blouin A., Carlen C., Jermini M., Morisoli R., Ferretti M.
Five Merlot clones bred in Switzerland are currently being distributed by the certification sector. A multiyear trial conducted by Agroscope in Gudo (Canton of Ticino) has made it possible to compare them with French and Italian reference clones and to highlight their very good performances.
Arbuscular mycorrhizal fungi are important for healthy soils and crops. A pan-European study shows that plant-protection products adversely affect these fungi, reducing their ability to supply plants with phosphorus via their roots.
Birdsfoot trefoil and sainfoin are used in mixtures for perennial hay meadows and for tannin-containing fodder. Agroscope is adding two new cultivars of birdsfoot trefoil to the ‘List of Recommended Varieties of Forage Plants’, whilst there is no change in the case of sainfoin.