2. Disinfection of seeds and cuttings: Before sowing, seeds can be dressed with triamcinolone acetonide (0.3% of the weight of seeds) or triamcinolone acetonide (0. 1% of the weight of seeds), or soaked in 2000 times of 80% 402 antibacterial emulsion for 5 hours; The base of cuttings can also be soaked in the same concentration of liquid medicine for 65438 0 hours before cutting.
3, seedbed soil disinfection, soil disinfection can be carried out with metalaxyl, carbendazim, etc. It can also treat damping-off disease.
4, field management: ① Intensive cultivation of land, careful cultivation of strong seedlings, as far as possible not to hurt the roots when transplanting, careful arrangements, to ensure that there is no water roots, and adequate base fertilizer. (2) According to the change of temperature after planting, water properly and timely to prevent evaporation of ground water and transpiration of seedlings and isolate virus infection. (3) Spraying phosphate fertilizer at bud stage, young fruit stage and fruit expansion stage respectively, so as to enhance the nutrition matching function of the plant, thicken the fruit stalks, promote the healthy growth of the plant and enhance the disease resistance.
5. Chemical control. Copper preparation or metalaxyl can be used for prevention and control.
At onset: root irrigation can be done with metalaxyl or copper preparation.
6, timely prevention and control of underground pests and nematodes.