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研究表明，辣椒疫病菌（ＰｈｙｔｏｐｈｔｈｏｒａｃａｐｓｉｃｉＬｅｏｎｉａｎ）的菌落形态多为绒毛型，孢子囊会脱落，带有长柄，形态大小变化很大，长宽比１．４～１．７，乳突明显；混合菌株可形成藏卵器，雄器底生；菌株在１２～３５℃范围内均可生长，最适生长温度为２８℃；对浓度为１／８×１０－６的孔雀石绿不敏感；不同菌株利用淀粉的能力差异很大；孢子囊的形成受湿度的影响，湿度越大，孢子囊形成越多；形成孢子囊的最适温度为２０～２８℃；ｐＨ值影响孢子囊萌发方式和萌发率，适当偏酸，孢子囊萌发率高，有利于形成游动孢子；病菌可侵染茄科、葫芦科等多种作物。
The results showed that the colonies of Phytophthora capsici Leoni were mostly villous, the sporangium would fall off with long stems, and the shape and size varied greatly. The aspect ratio was 1.4-1.7, and the mastoid was obvious. The mixed strains Which can form the egg-storage and the bottom of the male. The strain can grow in the range of 12 ~ 35 ℃, the optimum growth temperature is 28 ℃, insensitive to the malachite green with the concentration of 1/8 × 10-6, The ability to use starch varies greatly; the formation of sporocysts is affected by humidity; the more humidity, the more sporocysts are formed; the optimum temperature for forming sporangium is 20-28 ℃; the pH affects the germination rate and germination rate , Appropriate acid, spore germination rate is high, conducive to the formation of zoospores; bacteria can infect Solanaceae, Cucurbitaceae and other crops.