在尼日尔北部阿伊尔山脉绿色蔬菜生产区的常规调查中发现了一个值得注意的番茄僵顶病发生率加剧的问题。虽然僵顶病在以前的4年中仅在8株植物上被发现,1987年2月该病又在做定期观察的12块绿洲中的8块蔬菜田中被观察到,最高发病率为20％。症状为植株矮化,叶片变黄,侧枝强烈增生,老龄植株的叶子被扭曲且呈淡灰色,花出现变叶病态或开始出现微绿色,花萼常有5cm长,覆盖在花上 In a regular survey of green vegetable producing areas in the Ayer Mountains in northern Niger, a notable problem of increased incidence of stiff tomato disease in tomatoes was identified. Although the disease was found only in 8 plants in the previous 4 years, it was observed in 8 vegetable fields in 12 oases that were regularly observed in February 1987 with the highest incidence of 20% . Symptoms of plant dwarf, leaf yellow, strong collateral, old plants are distorted and light gray leaves, flowers appear sickle or began to appear greenish, calyx often 5cm long, covered in flowers