一、北京十字花科蔬菜种传黑斑病的检验 被检验样品分别采自北京不同蔬菜产区,均为1984年收获。共收集11种十字花科蔬菜的28个品种和39份样品。 方法采用国际上通用的十字花科作物种子健康检验技术《国际种子检验规程》(1979)。在0.2％2,4—二氯苯氧基乙酸钠盐溶液里浸透的3层吸水纸放在培养皿中(抑制种子发芽),被检验种子不经过表面消毒直 First, the Beijing cruciferous vegetables black-spot disease test were tested samples were collected from different vegetable producing areas in Beijing, were harvested in 1984. A total of 28 species and 39 samples of 11 cruciferous vegetables were collected. Methods Internationally accepted crucifer crops seed health testing technology “International Seed Inspection Regulations” (1979). Three layers of blotting paper soaked in 0.2% 2,4-dichlorophenoxyacetic acid sodium salt solution were placed in Petri dishes (to suppress seed germination) and the seeds tested were not surface-sterilized