The biological prevention and control project for agricultural natural enemies that the Ministry of Science and Technology has promoted as a key point - the "control of earthworms and earthworms" biological control technology is being accepted by more and more farmers, showing broad prospects for development. Since the middle of last year, the pilot plant has been promoted to more than 10 provinces, municipalities and autonomous regions throughout the country, which has effectively promoted the transformation of the control of agricultural and forestry crop pests from chemical control to biological control. Pesticides are key pests commonly found in various agricultural and forestry crops around the world. They have been using chemical methods to control pupae and have caused serious pollution to the environment and food. With increasing pest resistance, the amount of pesticides continues to increase. The “Using 螨 螨 螨 技术 技术 技术 技术 技术 螨 螨 螨 螨 螨 螨 螨 螨 利用 利用 利用 利用 利用 利用 利用 利用 利用 利用 利用 利用 利用 利用 利用 利用. Preying on earthworms does not harm plants. The only prey that eats on them is the offspring. Once they have enough food sources, they can continue to multiply. However, after predatory crickets eat and cripple, they will nibble away from each other. Therefore, long-term use of oysters to control leeches on a large scale must be realized by artificial breeding and breeding of large scales. In the 1970s and 1980s, China had carried out large-scale research on the biological control of "using maggots to control cockroaches." However, it has failed to solve the problems of excessive feeding costs and large scale feeding, storage and transportation. Fujian Institute of Plant Protection, Zhang Yanmiao, introduced in 1997 the excellent cultivar, C. oleracea, for artificial domestication and cultivation. The artificial feed formulation and the simple slow release device were developed successfully. Three national invention patents were obtained and completely solved. The problem of large-scale feeding, storage and transportation of predators. Zhang Yanqi applied the predator to the bamboos, citrus, strawberries, flowers, vegetables, tea, and edible fungi in open-air environments and achieved success. Through international search, many achievements were innovative. The cost of predator breeding cultivated by Zhang Yanji is only a few tens of that of similar foreign products, which is much lower than the cost of chemical control, and at the same time it has created a good ecological benefit. She designed a collection of practical prey packs containing more than 2,000 prey, and as long as each bag is affixed to or hung on each plant, the predator can be released to eliminate red spiders, rust ticks, and crickets. Whitefly, hummer, etc. Predator mites must be released at low density, and pesticides are banned after release. Last year, the Plant Protection Office sold only a few thousand bags of products. This year's orders increased to more than 200,000 bags. From the current ordering situation, the demand will exceed 1 million bags in the next year. At present, the Plant Protection Institute has established a production base capable of producing more than 11 billion predators per year. It is understood that the use of prey is good, the cost of prevention and control is only 1/7-1/15 of the cost of chemical control, and it is equivalent to 60%-70% of the cost of chemical control in general. The use of pesticides can be reduced by 40%-60% throughout the year. According to Chen Ning, deputy section chief of planting section of the Agricultural Bureau of Zhaoqing City, Guangdong Province, in May this year, they introduced 25,000 bags of predators to apply to 300 acres of citrus groves. The number of fights was significantly reduced, the leaves of fruits were bright, the fruit was full, and the luster was good. , It is estimated that the provincial workers will increase efficiency by 550-800 yuan per mu.