三门峡地区地形复杂,生态条件差异较大,伴随而生的苹果病虫发生时间长,种类多。近年来,随着农业结构的不断调整,耕作制度的不断改革,水肥条件的不断改善,栽培新技术的不断推广,加之厄尔尼诺现象的频繁影响和乡镇企业的快速发展,使果园生态体系发生了很大变化,加重了病虫的发生 Sanmenxia terrain complex, large differences in ecological conditions, accompanied by the occurrence of apple pests long time, variety. In recent years, with the continuous adjustment of agricultural structure, continuous reform of farming system, continuous improvement of water and fertilizer conditions, continuous promotion of new cultivation techniques, coupled with the frequent impact of El Niño and the rapid development of township and village enterprises, the orchard ecosystem has taken place very much Big changes, aggravating the occurrence of pests and diseases