甘肃白兰瓜、西瓜疫霉种的鉴定研究

Studies on phytophthora Species From Honeydew and Watermelon in Gansu province

从甘肃白兰瓜、西瓜上分离出15株疫霉,鉴定出两个种:掘氏疫霉Phytophthoradrechsleri Tuckcr,辣椒疫霉P.capsici Lconian。分离物经过配对培养,均可产生性器官,10株掘氏疫霉为A_1交配型,5株辣椒疫霉为A_2交配型。

A total of 15 isolates from diseased fruits of Honey Dew and Water melon in the plantation were obtained from Gansu province.These isolates were identified as P.drechsleri and P.capsici, based on the morphology of sporangia, sporanfial caducity, type of antheridia and physiological characteristics, etc. 15 isolates can form sex organs when paired with an opposite strain.Both A! and A2 mating types are detected in these two districts.A, mating type of phytophthora drechsleri in all ten isolates.As for P.capsici A2 mating type in all five isloates.