关键词: 胶孢炭疽菌婆婆纳专化型, 波斯婆婆纳, 侵染力, 影响因子, 黄化突变体, 光合作用, 叶绿素含量, 番茄

Abstract: The effects of the characters of the fungus, the growing period of plants and environmental factors on the pathogenicity of Colletotrichum gloeosporioides f.sp. veronicae infecting Veronica persica were studied in pot experiments. The results showed that 1.08×10⁸spores·mL^-1 suspension could kill the seedlings with two cotyledons within one week and cause old plants serious disease. 1×10⁸ spores·mL^-1 was optimal concentration and 1 or 2 weeks old was the best age of the spores for killing birdseye speedwell. The optimal temperature was 15～25℃ for the disease development. More than two days' dew exposure was required to kill the weed. However, the disease was also developed better when corn or soybean flour was added or the darkness period during dew exposure was prolonged.

Key words: Veronica persica, Colletotrichum gloeosporioides f.sp. veronicae, Pathogenicity, Influential factors, photosynthesis., tomato, chlorophyll-deficient mutant, chlorophyll content