In 2005, a first major epidemic of powdery mildew on triticale occurred in Switzerland. The present study relies on perennial observation from 3 sites of the Swiss variety trial network for the inscription in the national catalogue. Eight recent varieties have been included in the observation scheme in order to test the severity of the infections as well as their impact on the yield. The results give evidence on 3 different host-pathogen interaction types, dependent on the variety: (1) low infection without yield loss, (2) high infection with reduced yield loss, and (3) high infection with high yield loss. The use of resistant varieties allows to control the disease in an efficient and an economic manner.
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.
Tall oat grass and golden oat grass are typical hay-meadow grasses that are also suitable for forage mixtures. Of the four tall and three golden oat grass varieties tested, only one new variety of tall oat grass is likely to make it onto the List of Recommended Varieties.