Use a well-developed organic fertilizer as a base fertilizer. Add 20 kg of lime powder per cubic meter of manure, mix thoroughly and get stuffy, then apply it to the field. Fertilization should be deepened to reduce the spawning of seed fly and effectively reduce its damage. It also advocates the use of commercially available organic fertilizers and organic-inorganic compound fertilizers sold in the market. The use of plant ash can be carried out in the early spring and can also be carried out after harvesting the leeks. Sprinkle the plant ash (without rain) on the surface of the sash, mix it thoroughly, and mix the ash into the soil, or open the ditch (appropriate to see the roots) into the ditch and cover the soil. The application of ash to alfalfa is not conducive to alfalfa life, so it has a preventive and control effect, loosens the soil, increases the content of phosphorus and potassium fertilizers, and can make young leek seedlings strong and increase yield. With the application of ammonia fertilizer in the water during the growth of leeks, 15 ~ 25 kg of ammonia per acre, according to 80 ~ 100 times dilution, irrigating or flushing with water, both have significant role in killing fleas. In combination with watering, 15 to 20 kg of ammonium bicarbonate can be topdressed with water, which can also effectively kill larvae. Watering fresh urine After harvesting 1 leeks, immediately use fresh urine to pour the vegetables. When the soil is moist, it is not water. When the soil is dry, it is 50% water. In this way, the soil surface is often in a dry state, and the tiny eggs cannot hatch. Suitable for small farmers to implement.
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