Leaf spot disease caused by several phytopathogenic fungi is the most common problem in the solanaceous crops. A total of 36 leaf-spot-associated fungal species were isolated from brinjal, tomato, and chilli crops, which were identified by rDNA sequencing of the internal transcribed spacer region. These fungal species belonged to eight genera (Aspergillus spp, Alternaria spp, Sarocladium spp, Nigrospora spp, Corynespora spp, Chaetomium spp, Penicillium spp, and Fusarium spp). The results of the pathogenicity test of the isolates revealed that eight isolates had similar characteristics even in cross-inoculation with brinjal, tomato, and chilli crops. Twenty-two isolates showed pathogenicity in their respective hosts and cross-pathogenicity of any one of the plants tested. The results suggest that periodic monitoring of leaf spot pathogen distribution in the field can shed light on tentative emergence of new diseases.

由几种植物致病真菌引起的叶斑病是茄科作物中最常见的问题。从茄子，番茄和辣椒作物中分离出总共36种与叶斑相关的真菌，通过内部转录间隔区的rDNA测序鉴定。这些真菌属于八个属（曲霉属，链格孢属，Sarocladium属，黑孢属，棒孢属，毛壳菌，青霉属，和镰刀spp）。分离株的致病性测试结果表明，即使在与茄子，番茄和辣椒作物的交叉接种中，八个分离株也具有相似的特征。22株分离株在其各自的宿主中显示出致病性，并且对任何一种测试植物显示出交叉致病性。结果表明，定期监测田间叶斑病原体的分布可以揭示新疾病的暂定出现。