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期 刊 ：植物保护学报 1992年

关键词：白兰瓜；疫病；流行；栽培防病；

Keywords:blight of honey dew, epidemic, cultural control,

摘 要 ：德雷疫霉(Phytophthora drechslcri)游动孢子接于白兰瓜(honey dew)叶片上,12小时侵入率达19.3%,96小时孢子囊形成数254.3个/cm~2;德雷疫霉 A_1型与辣椒疫霉(Phytoph-thora capsici)A_2型配对,接于白兰瓜叶上形成大量卵孢子。连续降雨和高温,或高温天气给瓜田灌水是疫病流行的决定因素。70%代森锰锌在低浓度时对德雷疫霉、辣椒疫霉菌丝生长、孢子囊和卵孢子形成均有明显的抑制作用。高畦栽培对烂秧防效达89.2%—92.0%,对烂瓜防效达100%。

Abstract:Penetration rate was 19.3% on 12 hours after inoculation with mo-tile zoospores on leaves of honey dew.Sporangia number formed was254.3/cm~2 on 96 hours after inoculation with motile zoospores on leavesof honey dew.Compatible mating cultures of strains of

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