The key points are cleaning up rural scenery, cultivating disease-free seedlings, spraying with yellow board, driving aphids with dark ash, microbial control and pesticide control. The sprayer needs to be exquisite, and the key to spraying is the back and heart of the leaf.
Generally, drugs with contact killing, internal inhalation and fumigation are used. There is no need to use the same pesticide or the same pesticide for a long time. In the process of taking medicine, it is necessary to ensure the safe observation period of pesticides. Attention should be paid to the external temperature standard when fumigating drugs. In order to prevent fertilizer from damaging the main stem, it seems that it is best to decide the fumigation time.
Prevention and control of agriculture and animal husbandry, and proper treatment of residual plants and leaves during stubble retention. According to the effective regulation of the main stem, yellow leaves and dead leaves should be removed reasonably, and diseased leaves and plants should be removed immediately. In the pre-seedling stage of physical control, according to the countermeasures such as sunshade net, the harm of aphids is prevented. Once found, pesticides should be used immediately for prevention and control. Using the yellowing growth habit of aphids, plywood or cardboard with a length of 1 m and a width of 0. 1~0.2 m can be set in the field, and a layer of orange or yellow paint can be painted first.
After drying, apply a layer of viscous yellow automobile engine oil mixed with 10 automobile engine oil and a small amount of yellow glycerin. Set 32~34 pieces every 667 square meters, and hand-coat 1 time automobile oil every 7 7~ 10/day. Dark gray drives away aphids and covers the road with dark gray plastic film; Pull 1~2 silver-gray film hanging strips parallel to the ground around the shed.
Microbial control can use parasitic bees released by floating insects and aphids, and parasitic bees can control aphids. Fumigation can be used for organic chemical control. When aphids are first found in the shed, 300 ~ 350g of 22% dimehypo can be used every 667m2, and placed for 4~5 times. After the dark fire is lit, the shed will be closed for 3 hours for fumigation. 40% dimethoate EC 1000~2000 times solution can be used for pesticide application.
Or 2.5% deltamethrin EC 2000~3000 times, or 10% acetamiprid wettable powder 2000~3000 times, or 10% bifenthrin EC 3000~4000 times, or 50% phoxim EC 1000 times.
Or 1200~ 1500 times of 2.5% beta-cypermethrin EC, or 10% cypermethrin EC1200 ~/0/600 times of EC, or 4000~8000 times of EC.