四川省犍为县越冬代稻显纹纵卷叶螟冬后虫口密度和生物学特性  

Density and biological characteristics of Cnaphalocrocis exigua(Butler)population of the overwintering generation in Qianwei county,Sichuan province

作　　者：杨亚军[1] 廖秋菊[2] 徐红星[1] 谢馨 彭城林 刘映红[2] 吕仲贤[1] YANG Yajun;LIAO Qiuju;XU Hongxing;XIE Xin;PENG Chenglin;LIU Yinghong;L Zhongxian(State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products,Institute of Plant Protection and Microbiology,Zhejiang Academy of Agricultural Sciences,Hangzhou 310021,China;College of Plant Protection,Southwest University,Chongqing 400716,China;Qianwei Station of Plant Protection and Quarantine of Sichuan Province,Leshan 614400,China)

机构地区：[1]农产品质量安全危害因子与风险防控省部共建国家重点实验室,浙江省农业科学院植物保护与微生物研究所,杭州310021 [2]西南大学植物保护学院,重庆400716 [3]四川省犍为县植保植检站,乐山614400

出　　处：《植物保护》2020年第4期205-209,共5页Plant Protection

基　　金：国家现代农业产业技术体系建设专项(CARS-01-36);农产品质量安全危害因子与风险防控省部共建国家重点实验室开放基金(2010DS700124-KF1908)。

摘　　要：稻显纹纵卷叶螟Cnaphalocrocis exigua(Butler)是稻纵卷叶螟Cnaphalocrocis medinalis(Guenée)的近缘种,目前主要在我国西南稻区发生为害。为了明确稻显纹纵卷叶螟在四川省犍为县冬后的虫源状况,我们开展了稻显纹纵卷叶螟冬后虫源结构调查,观察了冬后种群的生物学特性,并研究了温度对其的影响。结果显示,犍为县舞雩乡和罗城镇稻显纹纵卷叶螟冬后虫源密度分别为7.09头/25丛和5.50头/25丛。调查时稻显纹纵卷叶螟主要以蛹为主,有少量幼虫。稻显纹纵卷叶螟越冬代雌雄蛹重分别为11.56 mg和11.82 mg,性比(雌∶雄)为1.29∶1,蛹被寄生率为16.5%。20℃、22℃、24℃和室温下稻显纹纵卷叶螟越冬代蛹羽化率分别为44%、38%、52%、43%。不同温度下,稻显纹纵卷叶螟产卵量及成虫寿命无显著差异。本研究结果对于开春稻显纹纵卷叶螟的防控具有指导意义。Cnaphalocrocis exigua,a closely related species of Cnaphalocrocis medinalis,widely distributed in the paddy field of southwestern China.In order to understand the population status of C.exigua after overwintering in Qianwei county,Sichuan province,population structure of C.exigua after overwintering was surveyed,the biological characteristics were observed,and influence of temperature on its biological characteristics was also investigated.The results showed that the population densities of C.exigua in Wuyu and Luocheng were 7.09 and 5.50 individuals per 25 tillers after winter,respectively.During the investigation,the pupa was the main type,with a small number of larvae.The weight of overwintering female and male pupae of C.exigua was 11.56 mg and 11.82 mg,respectively.The sex ratio(female∶male)was 1.29∶1,and the pupa parasitism rate was 16.5%.The emergence rates of overwintering pupae were 44%,38%,52%and 43%at 20℃,22℃,24℃and room temperature,respectively.There was no significant difference in egg number and adult longevity under different temperature conditions.The above results have guiding significance for the control of C.exigua in early spring rice filed.

关 键 词：稻显纹纵卷叶螟 越冬 温度 生物学特性 

分 类 号：S435.112.1[农业科学—农业昆虫与害虫防治]