There are generally four methods for controlling vegetable pests: First, the pest control method for dead insects, which is about to smash the dried cabbage caterpillar, smashing juice to spray water, generally only 40 dead insects per 667 square meters, can effectively control cabbage caterpillars. The second is the nettle leaf juice method, which will add 3-5 times more water to the ramie leaf mash, soak the leaf surface after soaking for 12 hours, which can effectively control the aphid and other pests; The third is the tobacco mixture method, that is, the tobacco and water press. The ratio of 1:40 is weighed. After the tobacco leaves are shredded, they are soaked in 10 parts of boiling water and capped. When the water temperature drops to about 50°C, the soaked tobacco leaves are rubbed until no more concentrated juice is removed. Into the other 10 parts of water continue to rub 4 times, the filter residue remove the tobacco leaves, will be mixed with the appropriate amount of liquid detergent, spraying 50 kg of this mixture per 667 square meters, can control locusts, stink bugs, fly maggots, etc.; Fourth, urine wash Mixture method, that is, according to the ratio of 1:4:400 urea, washing powder, fresh water, after mixing well into a "urine-washing agent", spraying this liquid every 667 square meters 30 kilograms, can effectively control vegetable pots.
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