Knowledge graph-based defoliator early warning method and system

The invention discloses a defoliator early warning method and system based on a knowledge graph. The defoliator early warning method based on the knowledge graph comprises the following steps: constructing the knowledge graph; constructing a model; predicting the defoliating pests; and early warning of defoliating pests. According to the method, historical defoliating pest characteristic data in historical related data of defoliating pests are extracted, then a defoliating pest ecosystem model is constructed in combination with a constructed defoliating pest knowledge graph, and characteristic data corresponding to planting data of a planting area to be pre-warned are extracted; the method comprises the steps of extracting data of a to-be-early-warned planting area, analyzing the planting condition of the to-be-early-warned planting area according to the extracted data, analyzing the defoliator condition in combination with a defoliator ecological system model to obtain a defoliator prediction index, and fina