In Switzerland, the rape is grown mainly on the Plateau, from Geneva to Thurgovie. With 15 000 ha cultivated, it is one of the predominant crops in our rotation-culture system. The majority is cultivated as autumn rape, sown at the end of August. In some of our neighboring countries, such as Germany and France, viruses responsible for virosis having a high economic impact on this crop have been detected in many rape plots. To investigate on the situation in Switzerland, a survey was realized in spring and autumn 2010 by the virology and entomology groups of the Research Station Agroscope Changins-Wädenswil ACW. This study involves 11 plots dispersed on the Swiss Plateau. The results demonstrated that despite the quasi omnipresence of these «high economic impact» viruses, a really low level of infection was detected.
Stucky T., Hochstrasser M., Meyer S., Segessemann T., Ruthes A. C., Ahrens C. H., Dahlin P., Pelludat C.
The root knot nematode (RKN) Meloidogyne incognita causes damage in field and greenhouse crops. Agroscope researchers have developed a new screening test to identify bacteria that antagonise this agricultural pest.
With CULTAN fertilisation, nitrogen is injected into the soil as an ammonium solution. Multi-year trials conducted by Agroscope show that this method reduces nitrogen leaching by an average 38% without negatively affecting yields.
Tuta absoluta is one of the most destructive pests of solanaceous crops. Agroscope has developed a statistical model to study the population dynamics of the pest and its parasitoids and allows interventions to be optimally planned.