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期 刊 ：植物保护学报 1992年

关键词：棉铃；卵孢子；初侵染源；棉花；疫病；

Keywords:Phytophthora boehmeriae, oospores, overwintered in soil, primary source of infection,

摘 要 ：棉铃疫病菌(Phytophthora boehmeriae Sawada)卵孢子经土壤埋存160天左右越冬,至少有16%～47%的卵孢子仍存活。卵孢子不依赖病残体可单独在土壤耕作层中越冬存活。越冬卵孢子萌发后可侵害棉苗。认为棉铃疫病菌卵孢子在土壤中可安全越冬作为次年病害的主要初侵染源。

Abstract:Oospores of Phytophthora boehmeriae causing cotton boll rot diseasewere buried in soil for about 160 days to overwinter 16%-47% oosporeswere survival.Oospores could also survival in soil without the protec-tion of plant recidual tissue or infected cotton

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