Agricultural control
Implement crop rotation. Planned crop rotation can effectively reduce the bacterial content in soil and alleviate the occurrence of diseases.
Improve soil. Ralstonia solanacearum likes acidic soil. Combined with soil preparation and base fertilizer application, the hydrated lime powder per mu 100 kg can make the soil neutral or slightly acidic, which can effectively inhibit the occurrence of this disease.
Optimize the cultivation methods. Adopt high ridge or semi-high ridge cultivation mode, support field furrow system, reduce field humidity, increase phosphorus, calcium and potassium fertilizer at the same time, promote crop growth, enhance disease resistance and reduce the occurrence of bacterial wilt.
Cultivate strong seedlings. Use nutrition pots, fertilizer balls and hotbeds to raise seedlings, cultivate short and strong seedlings and enhance the disease resistance and tolerance of crops.
Spraying microelement fertilizer. Spraying micro-fertilizer can promote the growth and development of vascular bundles and improve the disease resistance of plants. From the flowering stage, 40kg of 100g multi-element mixed efficient boron fertilizer is sprayed once per mu, or 50kg of 0.1%-0.2% mixed solution of boric acid and manganese sulfate is sprayed once every 10-20 days, and it is sprayed for 2-3 times. In order to avoid the increase of acidic substances in plants, 0.5% sodium bicarbonate solution can be sprayed 1-2 times during the intermission of spraying trace elements of boron and manganese.
Chemical control.
To cultivate potatoes, choose potatoes without diseases, soak them in 200 times formaldehyde solution 1.5-2 hours, take them out, rinse them with clean water, and sow them. When the seed potato is cut into pieces, the cutter should be soaked in 75% alcohol for disinfection.
Pesticide recommended by plant protection experts: Norwegian Lao Dao Company: 86.2% cuprous oxide (copper WP, WG), sprayed once every 7- 10 day for 2-3 consecutive times, and the control effect can reach over 90%.
Before or after planting solanaceae vegetables, 20% soil bactericidal wettable powder1000-2000g per mu is mixed with wet fine soil and sprinkled on the topsoil, which can effectively kill pathogenic bacteria in the soil. At the initial stage of the disease, 50-60 kg of streptomycin solution was sprayed every 7- 10 day for 2-3 times. When bacterial wilt occurs, root is irrigated or sprayed with 20% soil bactericidal wettable powder 700-800 times, and it is applied 2-3 times every 7- 10 day 1 time.