2018年我国玉米重大病虫害发生特点和原因分析

Occurring characteristics and related factors of major corn diseases and insect pests in 2018 in China

本文总结了2018年我国玉米病虫害发生概况,重点分析了亚洲玉米螟、二点委夜蛾、黏虫、棉铃虫、玉米叶螨、双斑萤叶甲以及大斑病、玉米锈病等近年玉米上发生为害明显的重大病虫害的发生特点。分析讨论了虫源基数、天气条件、种植制度、栽培技术以及品种抗性等因素对玉米病虫害发生的影响。

Ostrinia furnacalis, Athetis lepigone, Mythimna separata, Helicoverpa armigera, Tetranychus truncates,Monolepta hieroglyphica, northern corn leaf blight and corn rust are major diseases and insect pests of corn in China,which can cause heavy yield losses in corn production. This paper summarized occurring characteristics of those major corn diseases and pests in 2018, and discussed main influence factors, including source of pests, cultivation systems,weather conditions and variety resistance.