【摘要】 【目的】调查广西稻田粘虫及其寄生性天敌昆虫发生种类,为粘虫的预测预报及可持续防控提供科学依据。【方法】在不同调查点进行田间调查,将粘虫幼虫和蛹带回室内饲养,待羽化后鉴定其种类,并对期间饲养出的寄生性天敌昆虫进行种类鉴定。【结果】广西稻田共发现3种粘虫,分别为东方粘虫Mythimna separata(Walker)、劳氏粘虫Mythimna loreyi(Duponchel)和淡脉粘虫Mythimna roseilinea(Walker);共发现6种寄生性天敌昆虫:螟蛉绒茧蜂Apanteles ruficrus(Haliday),寄生率可达20%;粘虫绒茧蜂Apanteles kariyai Watanabe,寄生率可达14.29%;斜纹夜蛾盾脸姬蜂Metopius(Metopius)rufus browni(Ashmead),寄生率为2.22%;粘虫白星姬蜂Vulgichneumon leucaniae Uchida,寄生率为18.53%;粘虫长芒寄蝇Dolichocolon klapperichi Mesnil,寄生率为2.22%;日本追寄蝇Exorista japonica Townsend,寄生率为0.42%。【结论】广西稻田3种粘虫中,以东方粘虫为害水稻最为严重;越冬粘虫主要有东方粘虫和劳氏粘虫。螟蛉绒茧蜂为越冬粘虫寄生性天敌昆虫优势种。更多还原

【Abstract】 【Objective】In order to provide scientific basis for the prediction and control of armyworm,the species of armyworms and their parasitic natural enemy in rice fields of Guangxi were investigated.【Method】Field investigations were carried out in different investigation points to collected larvae and pupae of armyworms and reared in laboratory,then identified species of adult armyworms and their parasitic natural enemy insects after their eclosion.【Result】Three species of armyworms and six species of parasitic natural enemy insects were found in the rice fields in Guangxi: Mythimna separate( Walker); Mythimna loreyi( Duponchel) and Mythimna roseilinea( Walker). Apanteles ruficrus( Haliday)( the parasitic rate was 20 %),Apanteles kariyai Watanabe( the parasitic rate was 14. 29 %),Metopius( Metopius) rufus browni( Ashmead)( the parasitic rate was 2. 22 %); Vulgichneumon leucaniae Uchida( the parasitic rate was 18. 53 %); Dolichocolon klapperichi Mesnil( the parasitic rate was 2. 22 %) and Exorista japonica Townsend( the parasitic rate was 0. 42 %).【Conclusion】M. separata has the most serious damage to rice among three species of armyworms; The overwintering armyworms are mainly M. separata and L. loreyi. A. ruficrus is the dominant species of parasitoids of overwintering armyworm.更多还原