广州地区茄疫病的发生及疫霉种鉴定

 1987～1999年,从广州地区茄的果实、茎、叶及根上分离得到疫霉菌,根据形态特征、培养性状及生理特性等方面研究结果,鉴定出4个种,其中以辣椒疫霉Phytophthora capsici Leon较为普遍,烟草疫霉P.nicotianae Van Breda de Haan次之, 掘氏疫霉P.drechsleri Tucker较少出现,致病疫霉P.infestans (Montagne) de Bary 仅见于春季;此外,种群分布与前作及不同季节有关。

On the Occurrence and the Identification of Eggplant's Phytophthora Disease in Guangzhou Region

Eggplant's Phytophthora disease has been found to be widely occurred in Guangzhou region. An investigation on the disease was carried out in the years of 1987～1999. The diseased fruits, stems, leaves and roots were collected from the fields, and isolation and indentification of the causal fungus was made in the laboratory. Four species of Phytophthora were found to be the pathogans. Among them the most commonly occurred and widly distributed species was P.capsici leon, and the next one was P.nicotianae Van Breda de Haan. The P.drechsleri Tucker, However, Could be found only rorely, while the P.infestans (Montagne) de Bary could be found only in spring. Furthermore, the amound of occurrence of each of the 4 Phytophthora species was found to be closely related to their former crops.