掘氏疫霉卵孢子在田间越冬的研究  

ON OVERWINTERING OOSPORES OF PHYTOPHTHORA DRECHSLERI IN THE FIELD

作　　者：唐德志[1] 孙毓彬[1] 何苏琴[1] 

机构地区：[1]甘肃省农科院植物保护研究所

出　　处：《植物病理学报》1991年第1期59-63,共5页Acta Phytopathologica Sinica

摘　　要：掘氏疫霉Phytophthora drechsleri Tucker phy—5 A_1型与phy—64A_2型配对培养,在VA培养基上产生的卵孢子数量最多。卵孢子在15cm深土壤中,经过1988—1989年冬季,存活率为82.95%。卵孢子连同VA培养基制成悬浮液,白天散光照射、夜间黑暗比全部黑暗萌发率高;加土壤浸渍液比加蒸馏水萌发率高。Compatible mating strains of Phytophthora drechsleri A1 and A2 produce oospores abundantly in paired cultures on VA medium. Survival of oospores was 82.95% under the soil surface in winters of 1988-1989. The rate of oospore germination was higher under the alternation of day light and night darkness than under entire darkness. Furthermore the soil extract was more suitable for oospore germination than in distilled water.

关 键 词：掘氏疫霉 卵孢子 田间越冬 

分 类 号：S432.44[农业科学—植物病理学]