Chinese Journal of Rice Science

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Analysis on the Causes of Recent Outbreaks of Cnaphalocrocis medinalis in Nanning, China

WANG Feng-ying1, HU Gao1, CHEN Xiao1, SHEN Hui-mei1, LUO Shan-yu2, XIN De-yu3, XU Sheng-gang3, ZHANG Xiao-xi1, ZHAI Bao-ping1,*   

  1. 1Key Laboratory of Monitoring and Management of Plant Diseases and Insect Pests, Ministry of Agriculture/Department of Entomology, Nanjing Agricultural University, Nanjing 210095, China; 2Institute of Plant Protection, Guangxi Academy of Agricultural Sciences, Nanning 530012, China; 3Guangxi Plant Protection Station, Nanning 530012, China; 4Nanning Plant Protection Station, Nanning 530012, China; *Corresponding author, E-ail: bpzhai@njau.edu.cn
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-09-10 Published:2009-09-10

近年来广西南宁稻纵卷叶螟大发生原因分析

王凤英1,胡 高1,陈 晓1,沈慧梅1,罗善煜2,辛德育3,徐盛刚4,张孝羲1,翟保平1,*

  

  1. 1南京农业大学 昆虫学系/农业部病虫害监测与治理重点开放实验室, 江苏 南京 210095; 2 广西农业科学院 植物保护研究所, 广西 南宁 530012; 3广西壮族自治区植保总站, 广西 南宁 530012; 4南宁市植保站, 广西 南宁 530012;*通讯联系人, E-ail: bpzhai@njau.edu. cn

Abstract: The population feature and source areas of the rice leaffolder, Cnaphalocrocis medinalis (Guenée) on earlyseason rice in Nanning, Guangxi Zhuang Autonomous Region, China were studied through systematic field survey, dissection of female ovarian, trajectory analysis, synoptic analysis and historical data analysis. The results indicated that the possible source areas of the major immigrant populations of C. medinalis in Nanning, China in 2007 were the northern parts of Vietnam, and the northern and central parts of the Laos and Thailand. The amount and date of the spring immigration in AprilMay and autumn return migration and their relationships with rainfall and rainy days between 1970-1980 and the recent years after 2000 were compared. It was found that the enormous increase of the spring immigrants of C. medinalis and earlier appearance of the autumn return immigration were the main causes for the consecutive outbreaks and serious damages after 2003. There were no relationships between the spring immigration and the autumn return migration, neither on its amount nor the date.

Key words: Cnaphalocrocis medinalis, ovarian dissection, population status, migratory trajectory

摘要: 通过田间系统调查、雌蛾卵巢系统解剖、轨迹分析、天气学背景分析及历史虫情分析,阐释了广西早稻上稻纵卷叶螟前期虫源和种群性质,发现2007年广西南宁市稻纵卷叶螟主迁入峰的主要虫源地为越南北部、老挝或泰国的中北部地区。通过比较1970-1980年和2000年以来两个不同时段中稻纵卷叶螟前期迁入(4、5月份)和秋季回迁(9、10月份)高峰期和高峰日的发生时间和发生量,分析1981-2002年与2003年以来两个时段之间的雨量、雨日与前期迁入量之间的关系, 发现2003年以来境外虫源前期迁入量倍增及秋季回迁提早(从9月中旬提前到9月初)是造成南宁稻纵卷叶螟连年大发生到特大发生的主要原因,而早期迁入与秋季回迁在时间和发生虫量上并无必然的联系。

关键词: 稻纵卷叶螟, 卵巢解剖, 种群性质, 迁飞轨迹