here is the answer now
Thank you for your interest on our product Prestop. Unfortunately the product is not yet available in Germany, but currently the pesticide registration process is in the final stage. Hopefully in the near future the product will be in the market in Germany too. Meanwhile I would advise you to contact the distributors of Prestop in Austria: Kwizda Agro (tel. +43 (0)5 9977-10236) or Biohelp (+43 664 968 29 53).
Prestop has been successfully used in protection of orchids against soil borne fungal diseases as well as in the control of Botrytis. There are experience in both professional production of orchids as well as several hobby growers of orchids have been using this biological product.