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Differentiation of Striped Stem Borer (SSB),Chilo suppressalis Walker From Rice and Zizania caduciflora Habitats
Author(s): 
Pages: 341-345
Year: Issue:  3
Journal: ACTA ECOLOGICA SINICA

Keyword:  二化螟比较习性不同生境茭白水稻;
Abstract: 水稻田越冬代二化螟最早于4月26日开始羽化,其羽化高峰期为5月13~14日,而茭白田越冬代二化螟的始见蛾日为5月5日,比水稻田二化螟迟了9d,羽化始盛期、高峰期、盛末期均比水稻田二化螟迟2~5d.水稻田二化螟越冬幼虫的存活率和化蛹率明显比茭白田二化螟低;而二者的羽化率则差不多.水稻田二化螟羽化成虫的雌雄性比为1∶1.44,而茭白田二化螟则接近1∶1.室内选择性试验表明,水稻田和茭白田二化螟均喜在高大的茭白植株上产卵,而幼虫则选择嫩绿的水稻.然而田间选择性试验证实,二化螟幼虫在钻蛀前无法越过田埂而转移到水稻植株上为害.取食茭白的二化螟个体明显大于取食水稻的二化螟,两种寄主上二化螟幼虫的酯酶同工酶也存在着差异.交叉繁殖试验表明,茭白和水稻上的二化螟属于同一种,但存在着部分生殖隔离.
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