In 2008, yellow rust of wheat was observed in two experimental sites in the cantons of Thurgau and Aargau. After isolation and purification, the virulence spectrum was determined based on wheat differentials. By this, both virulences Yr4 and Yr32 were identified for the first time in Switzerland. These virulences have already been described in the 90s in the North of Europe and their migration towards South was detected in 2007 in France and in 2008 in Switzerland, as related in the present work. Infection tests in greenhouses with these new strains showed that today’s wheat varieties present a satisfactory resistance against the new virulences. The reporting of other virulences occurrence in Europe emphasizes the importance to carry on with the pathogens monitoring organized by Agroscope, cantonal phytosanitary offices and the cereal branch.
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.