单植和混植香梨园梨小食心虫的种群动态  

Population dynamics of Grapholitha molesta in mono-and mix-cultured pear orchard

作　　者：蒋世铮 张文忠 王俊燕 JIANG Shizheng;ZHANG Wenzhong;WANG Junyan(Institute of Agriculture Science and Technology of Bayingolin Mongolian Autonomous Prefecture, Korla 841000, China)

机构地区：[1]新疆巴音郭楞蒙古自治州农业科学技术研究院,库尔勒841000

出　　处：《植物保护》2020年第2期204-208,共5页Plant Protection

基　　金：巴州财政资助项目(2015012)。

摘　　要：梨小食心虫Grapholitha molesta(Busck)是为害‘库尔勒香梨’的主要害虫。本研究利用性诱剂诱捕器系统调查了不同栽培管理条件、果树种类和用药次数下梨小食心虫各世代的发生动态。结果表明:单植梨园全年成虫有5个高峰期,混植梨园成虫有4个高峰期。单植梨园和混植梨园梨小食心虫种群世代发生量不同,混植梨园中梨小食心虫种群世代重叠严重,发生数量是单植香梨园的4.02倍;单植梨园中管理粗放的河边梨园梨小食心虫发生较重,打药频繁的母本园发生较轻,梨小食心虫成虫第1~第4代峰期延迟8~28 d,属于迁入为害。研究还表明:在混植梨园中梨小食心虫产卵有8个高峰,幼虫孵化期有6个高峰,在世代发展中相邻峰值叠加,形成成虫期4个大峰。因此,研究不同栽培管理条件下梨园梨小食心虫的发生规律有助于对其进行科学的防治。Oriental fruit moth,Grapholitha molesta(Busck),is a major insect pest on Korla pear.The population dynamics of oriental fruit moth in different types of mono-and mix-cultured pear orchards,including different cultural modes,different fruit species and insecticides application frequencies,were investigated using pheromone traps.The results showed that the adults of G.molesta have five and four peak periods per year in mono-and mix-cultured pear orchards,respectively.G.molesta occurred most heavily in the mix-cultured pear orchard with the population quantity 4.02-fold higher than that in the mono-cultured pear orchard,and the generations overlapped seriously.In mono-cultured orchards,G.molesta occurred more seriously in extensive managed orchard in the river side than that in the static tree orchard with frequently pesticides application,and the occurrence peaks delayed for 8-28 d,and the occurrence of G.molesta was due to immigration.In addition,there were eight peaks of oviposition and six hatching peaks in mix-cultured pear orchard,and the neighboring peaks merged together during the development and formed four bigger peaks in adult stage.Therefore,the study of occurrence regularity of G.molesta in different modes of management would be helpful for its scientific control.

关 键 词：梨小食心虫 性诱剂 发生规律 梨园 

分 类 号：S433.4[农业科学—农业昆虫与害虫防治]