近年来江苏省农作物虫害发生有了新的变化,像去年水稻纵卷叶螟暴发,给水稻生产造成了很大损失,该省农作物病虫害发生的变化主要呈现以下新特点: 自上世纪90年代后期以来,随着农业种植结构的调整,农作物布局复杂化、栽培轻简化,加上气候异常等因素影响,主要农作物虫害种群存在此消彼长的演替现象。该省部分常发性的重大虫害发生程度与暴发频率不断上升,并出现害虫抗性与适应性增强、难以防治、局部暴发成灾等新特点。例如,水稻螟虫抗药性增强;三种蝗虫持续并发、重发;纵卷叶 In recent years, there has been a new change in crop pests in Jiangsu Province. Like the outbreak of rice leafroller last year, which caused great losses in rice production. Changes in pests and diseases in the province mainly show the following new features: Since the late 1990s Since the adjustment of agricultural planting structure, the complexity of crop layout, the simplification of planting, and the influence of climatic anomalies, the pest population of the main crops has the phenomenon of shifting in opposite directions. The occurrence and frequency of some of the major pest diseases in the province have been on the rise, with new features such as increased resistance and adaptability to pests, difficulty in prevention and control and local outbreaks. For example, rice stem borer resistance increased; three locusts continued concurrency and reissue;