The key technology for preventing and controlling tomato yellow leaf curl virus disease is to effectively control the occurrence and spread of tomato yellow leaf curl virus disease from the source, and the majority of vegetable farmers are seizing the key technologies for prevention and control.
1. Carefully observe the leaves of the tomato seedlings to be colonized, which appear slightly shrivelled, and the leaves are yellow in color. The seedlings with relatively short seedlings must be completely removed to prevent the emergence of diseased seedlings from the shed.
2. For the empty shed to be planted (without drying in the winter or shed in the previous stage), use 30% dichlorvos for 400 grams per mu to seal fumigation, completely kill the nymphs in the shed, and then colonize and produce. Ensure no insect colonization.
3. The tomato production shed should increase organic fertilizer as much as possible. After the planting, the tomato shed needs to strengthen water and fertilizer management, apply more potassium fertilizer, pay attention to the addition of boron, zinc, iron and other trace elements; adjust the appropriate temperature and light intensity and time and find Suspected diseased plants were removed in a timely manner, and field pests, leaves, and weeds were promptly removed and properly handled outside the field.
4. Hang a yellow plate at the time of Bemisia tabaci generation. Set a sheet every 5 to 7 meters. The yellow plate should be adjusted as the plant grows. Always keep the plant 10 to 20 centimeters above the growth point, and pay attention to the viscosity. After the full insects are replaced in time to control the insect source, the population density is always controlled at a low level.
5. The use of new high-fat lipid membrane + bio-insecticides for the prevention and control of room temperature application in a timely manner based on the monitoring of insect pests. Should be more in the early morning or evening when the adult lurking in the back of the leaf when spraying, should be sprayed three times, spaced 7 days or so, in order to control the trend of B.toffish flour. Pay attention to mixing or rotating medications to delay drug resistance. To improve the control effect.
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