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１９９９年６月上中旬，巨鹿县豇豆普遍发生了细菌性叶斑病。据调查：该病一般发生在成株期，主要症状是：植株茎蔓顶尖新生叶片皱缩，叶缘向叶背面卷曲，不展，叶上生黄白色，大小不一的病斑。下部叶片病斑较少，皱缩卷曲较轻。病斑有的穿孔破裂，植株生长缓慢，结荚大大减少
June 1999 on the middle, Julu County cowpea common bacterial leaf spot. According to the survey: The disease usually occurs in the adult stage, the main symptoms are: the top of the plant stems and vines leaves shrinkage, leaf margin curled to the back of the leaves, not show, yellow and white leaves, the size of the lesion. Lower leaves lesser lesion, crimp curl lighter. Some perforation lesions rupture, plant growth is slow, pod greatly reduced