The fungicide resistance level of M. graminicola, a major agent of leaf blotch of wheat, was evaluated in 2008 for samples from 17 fields. Genes coding for the target proteins of QoI and DMI fungicides were characterised genetically. The frequency of the mutation conferring QoI resistance ranged between 1 and 96%, indicating that the Swiss M. graminicola population is in a transitory phase. Compared to other European populations of this pathogen, the Swiss population is on average more sensitive to DMI fungicides. These results represent the basic information to formulate recommendations regarding the use of these two fungicide groups to achieve a durable chemical control of this widespread leaf disease of wheat.
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.