【摘要】 通过对青椒疫病病原菌（Ｐｈｙｔｏｐｈｔｈｏｒａｃａｐｓｉｃｉ）的生物学特性的研究，得出：Ｐ．ｃａｐｓｉｃｉ在改良的ＰＤＡ培养基上生长状况优于在普通ＰＤＡ培养基上的生长状况；菌丝生长最适温度范围是２５～３０℃，致死温度为４５℃（１０ｍｉｍ）或４８℃（１０ｍｉｎ）．光照是促进Ｐ．ｃａｐｓｉｃｉ游动孢子囊产生的必要条件。游动孢子囊萌发的最适温度范围在２５～３０℃之间，２５℃下，２４ｈ时，萌发率达到最高，最适ｐＨ范围为６～８。更多还原

【Abstract】 This paper reports the biological characters of Phytophthora capsici.Thestudy showed that the growth of Phytophthora capsici is better on improved PDAmedium than on common PDA. The optimum growth temperature of the pathogen is 25～30℃,the lethal temperature is 45℃(10min)or 48℃(5mim).Light is one of thenecessary conditions in producing zoosporangiums. 25～30℃ is the optimum germinationtemperature of the zoosporangiums.The germination rate peaks in 25℃ for 24 hours.pH6～8 is the optimum germination acidity of zoosparangiums.更多还原