Croton is also known as Ba Ren, Gang Ren, and Ba Lu Gang Zi. It is an evergreen tree or shrub of the Euphorbiaceae family. Bark dark gray, 3-4 meters high. Leaves alternate, oval. Flower unisexual, racemes, male flowers on upper part, female flowers on lower part. The fruit is pod fruit, cylindrical, with 3 oval flat seeds. Croton contains toxic ingredients such as Croton (croton oil), Croton, Croton, and Croton, and it has strong contact and stomach poisoning effects on larvae of aphids, mulberries, and many lepidopteran pests. Croton can produce two kinds of botanical pesticides, croton powder and croton emulsion. The croton flour was prepared by grinding the croton with a stone mill and passing through a 200 mesh sieve. Take 0.5 kilograms of croton powder, add a small amount of water, put it in a pot and cook for half an hour. After filtration, add 35 kg of water to prevent pests such as ragwort and cotton aphid. The preparation method of croton milk is to take 350g of croton flour, dissolve it with 50kg of hot water, add 150g of sodium carbonate (sodium carbonate) for half an hour, add 150-200g of soap or soap after filtration, and mix it to make Croton Emulsions. In addition to the croton milk spray, it can also prevent and control mulberries. Croton oil is volatile and can cause inflammation of human skin and mucous membranes. Avoid prolonged contact and wear masks and goggles when milling. Croton is highly toxic to humans and should be used with caution. The toxicity of crotonoside preparations to silkworms is also large. Mulberry leaves can be harvested 1 month after spraying on mulberry trees.