Prevention and treatment of diseases of Codonopsis pilosula

First, rust mainly harms the stems and leaves of Codonopsis pilosula. Control methods: clean the countryside and eliminate weeds and diseased plants in the field. At the initial stage of the disease, 25% of the powder was sprayed with 1000-1500 times, or 90% of the sodium was sprayed with 400 times of sodium for prevention and treatment. Spray once every 7 to 10 days, 2 times in a row.

Second, root rot mainly harms the roots of Codonopsis pilosula. The method of control was to increase the application of phosphorus and potassium fertilizer from July to August. Before transplanting Codonopsis pilosula, soak the root with 1000 times solution of 50% methyl topiramate wettable powder for 5 minutes. At the time of onset, the roots were irrigated with 700 times of 50% methyl topiramate wettable powder or 58% of metalaxyl manganese zinc 600 times, once every 7 days for 2 or 3 times. In the plots with high incidence, 70% methyl topiramate 1000-1500 times can be used to irrigate the roots and remove the diseased plants.