Crop pests and diseases are one of the major agricultural disasters in China. They are characterized by many types, large impacts, and frequent outbreaks. The scope and severity of crop diseases and pests often cause heavy losses to China's national economy, especially agricultural production. The prevention and control of crop pests and diseases is an important measure to effectively deal with crop diseases and insect pests. Therefore, with the development and application of Internet of Things technology, the application of agriculture and forestry Internet of Things (IoT) in monitoring and early warning of crop pests and diseases has become more and more extensive. The application of this technology can become modern The decision basis for the monitoring and control of pests and diseases in agricultural crops has made important contributions to the prevention and control of major crop pests and diseases.
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Applying the agriculture and forestry IOT technology in the early warning and warning of crop pests and diseases, the plant protection department can collect real-time data on air, soil, pests and diseases in agricultural production sites, and connect the Internet of Things data to the agricultural big data platform to conduct inductive collation and system analysis; Combining data with expert diagnosis, the massive data will be merged and finally generated as a model for the growth of specific local crops at that time. Through the massive data analysis of product information and market information of big data platform bases, the production and sales laws will be summed up; the crop production model based on big data, It will in turn guide the production of Internet of Things, and ultimately achieve accurate and automated agricultural big data production.
The agriculture and forestry internet of things technology uses the Internet of things technology, identification model, database and information processing equipment to realize real-time monitoring and effective control of agricultural pests and diseases. In the early warning and warning of crop pests and diseases, the role of the agriculture and forestry internet of things is very prominent. It is mainly reflected in the real-time monitoring of the situation of diseases and insect pests, sensation, seedlings, and disasters in the whole growing season of crops, as well as automatic and early warning and forecasting. The important data it provides has become an important basis for users to carry out scientific pest control, and it is also an important prerequisite for safeguarding users' planting and production. It has a very important role and significance for the current development of agriculture. 
