First, variety selection and seed treatment.

① Choose the right variety. According to the main local virus sources, select disease-resistant varieties according to local conditions. In recent years, the newly bred high-yield varieties resistant to tobacco mosaic virus in China are Jiafen 15, Zhongza No.9, Zhongshu No.4, Zhongshu No.5, Zhongshu No.6, Zhongza No.4, Jiahong, Jiafen 10, Zaofeng (Cai Qin 1), Youlan Zaohong and Mao. The varieties resistant to cucumber mosaic virus are: 542 pink tomato, Zhongshu No.5, Maofen 802 and so on. ② Seed treatment. Before sowing, soak the seeds in clear water for 3-4 hours, then soak them in 10% trisodium phosphate solution for 20-30 minutes, take them out and rinse them with clear water, then accelerate germination and sow them, or soak them in 0. 1% potassium permanganate for 30 minutes.

Second, agricultural prevention and control.

(1) Remove the disability. Planting land should be rotated for more than 2 years; Dig deep into the land to promote the decay of the sick and disabled; Where conditions permit, lime should be applied to inactivate tobacco mosaic virus on the sick and disabled bodies in the soil. ② Avoidance of aphids and disease prevention. All ridges or ridges can be covered with silver gray film, and the aphid repellent effect of silver gray film can be used to reduce the spread of aphids to viruses. Protected areas should be covered and sealed with gauze to reduce outdoor aphids from entering the shed, so as to reduce the occurrence of virus diseases. ③ Strengthening field management. Pay attention to the removal of diseased seedlings, separate diseased plants from healthy plants when pruning rakes in the field, and disinfect hands with soapy water or inactivate viruses by dipping in milk to reduce the man-made spread of viral diseases. ④ Scientific training. Sowing in time, promoting early development, cultivating strong seedlings, planting in time and strengthening management. Using formula fertilization technology, spraying 6000 times solution of Aiduo or 7500 times solution of Zhibao to enhance plant disease resistance, and spraying NS-83 resistance enhancer 1 times solution before and after planting can induce tomato disease resistance and increase production.

Third, chemical prevention.

Spray 1.5% phytosanitary emulsion 1000 times, or 20% moroxydine ethyl copper wettable powder 500 times, or mushroom proteoglycan 200-300 times, or potassium permanganate 1000 times, and spray Zengchanling 50-1000 mg/kg.