Abstract:

In response to the prevalent occurrence of pests and diseases and the pressing need for pesticide reduction and quality improvement in the double-cropping rice area of Changsha City, an integrated pesticide reduction technology system centered on prioritizing biological control and implementing cascaded pest management was established and demonstrated on a large scale from 2021 to 2025. This system integrates agricultural ecological regulation, physical and chemical trapping technologies, and precise chemical control tailored to specific growth stages, thereby establishing a framework for green pest control throughout the entire rice growth period. Implementation was facilitated through measures such as pest monitoring and early warning, demonstration base construction, technical training and guidance, and specialized unified prevention and control. During the demonstration period, the commercial consumption of chemical pesticides in the region decreased from 4 041.49 t to 3 603.84 t, representing an average annual reduction rate of 2.71%. Concurrently, the coverage rate of green prevention and control for food crops increased from 44.40% to 61.20%, demonstrating significant efficacy in pest suppression and input reduction. This technology system provides a replicable practical model and technical support for promoting pesticide reduction and facilitating green, high-quality, and efficient rice production in double-cropping rice regions with similar ecological conditions in the middle and lower reaches of the Yangtze River.

Key words: double-cropping rice, pesticide reduction, green prevention and control, unified prevention and control

摘要：

针对长沙市双季稻区病虫害高发频发、农药减量提质压力突出的生产现实，2021—2025年整合构建并规模化示范推广以生防优先、梯级控害为核心的双季稻农药减量集成技术体系。该体系融合农业生态调控、理化诱控及生育期精准化学防控技术，搭建水稻全生育期绿色防控技术框架；依托病虫监测预警、示范基地建设、技术培训指导、专业化统防统治等举措推进落地应用。示范应用期间，区域水稻化学农药商品用量由4 041.49 t 降至3 603.84 t，年均降幅达2.71%，粮食作物绿色防控覆盖率由44.40%提升至61.20%，控害增效与减量成效显著。本技术体系可为长江中下游同生态类型双季稻产区推进农药减量、助力水稻绿色优质高效生产提供可复制、可借鉴的实践模式与技术支撑。

关键词: 双季稻, 农药减量, 绿色防控, 统防统治