Methods for prophylaxis of infections in crops and ornamentals, preferably in viticulture, and in woody plants
The invention concerns a method for prophylaxis of infections by fungi, particularly by oomycetes, and of bacterial infections in crop and ornamental plants. Areas of application are vine, fruit, vegetable and ornamental plant growing. The method of the invention is characterized in that an aqueous solution of a protease, alone or in combination with ß-glucanases and/or chitinases, is prepared, stabilizers, stickers and wetters are added, and the additized solution is applied by conventional techniques to the plants a number of times within the vegetation period, preferably ahead of weather-related phases of high infection threat.
1. A method for prophylaxis of infection by Plasmopara viticola in crops and ornamental plants, comprising spraying plants with an aqueous solution of a bacterial serine protease, characterized in that said bacterial serine protease is derived from Bacillus sp. or Nocardiopsis sp.
2. The method according to claim 1 , characterized in that said aqueous solution of a bacterial serine protease for the control of pathogens is applied at a dosage of 0.001-% to 1-%.
3. The method according to claim 1 , characterized in that a time interval treatment of the plants is performed by spraying aerial parts of the plants.
4. The method according to claim 1 , characterized in that said aqueous solution of a bacterial serine protease is applied at a pH of 4.0 to 8.0.
5. The method according to claim 1 , characterized in that said aqueous solution of a bacterial serine protease is applied at temperatures of 4° C. to 34° C.
6. The method according to claim 1 , characterized in that said aqueous solution of a bacterial serine protease is formulated with adhesive and wetting agents as well as stabilizers.
7. The method according to claim 1 , characterized in that said aqueous solution consists of said bacterial serine protease.
8. The method, according to claim 1 , characterized in that said aqueous solution consists of a combination of bacterial serine proteases.
9. A method for suppressing infections by Phytophthora infestans, Pseudoperonospora cubensis, Pseudomonas syringae or Clavibacter michiganensis in crops and ornamental plants, comprising spraying plants with an aqueous solution consisting essentially of a bacterial serine protease, characterized in that said bacterial serine protease is derived from Bacillus sp. or Nocardiopsis sp.
10. The method according to claim 9 , characterized in that said aqueous solution of a bacterial serine protease for the control of pathogens is applied at a dosage of 0.001% to 1%.
11. The method according to claim 9 , characterized in that a time interval treatment of the plants is performed by spraying aerial parts of the plants.
12. The method for according to claim 9 , characterized in that said aqueous solution of a bacterial serine protease is applied at a pH of 4.0 to 8.0.
13. The method according to claim 9 , characterized in that said aqueous solution of a bacterial serine protease is applied at temperatures of 4° C. to 34° C.
14. The method according to claim 9 , characterized in that said aqueous solution of a bacterial serine protease is formulated with adhesive and wetting agents as well as stabilizers.
15. The method according to claim 9 , characterized in that said aqueous solution consists of said bacterial serine protease.
16. The method according to claim 9 , characterized in that said aqueous solution consists of a combination of bacterial serine proteases.