Recently the increased use of stimulators by Swiss vegetable growers could be observed. Many of these substances/products are applied alone or in combination with other plant protection products, yet with varying success. The use of stimulators on farms appears in most cases without any control, which does not allow a scientific evaluation. According to Swiss law, stimulators have to be registered as a plant protection substance or as fertilizers. Most of the stimulators are based on inorganic or organic substances or contain microorganism. Some of them are of complex nature. In an experiment to control downy mildew (Pseudoperonospera cubensis) on cucumbers, three stimulators – Fitoclin, GenolPlant und Chitoplant – were compared to Aliette. In addition, their influence on yield and aphids were evaluated. None of the three stimulators reduced the incidence of downy mildew compared to the control and did not influence yield and the attack by aphids. Only Aliette reduced the incidence of downy mildew significantly.
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.
Stevenel P., Wendling M., Brabant C., Suss H., Savoyat C., Dierauer H., Mascher F., Charles R.
FiBL and Agroscope investigated bread wheat varieties to determine their yield and quality stability. The results show that the choice of variety must be adapted to the site and that high yield potential does not go hand-in-hand with a high protein content.