Control methods of downy mildew in rape

(agricultural get Rich Network) one is crop rotation. Rotation with Gramineae crops for 1 to 2 years or flood-drought rotation can reduce the number of spores of Honda pathogens and reduce the incidence of disease. The second is seed retention and seed treatment of disease-free plants. Leave seeds for disease-free plants in the field before harvest or select seeds with 1% salt water before sowing, take sunken and full seeds, wash them with clean water and dry them before sowing.