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一、引入已在 EPPO 地区发生的病原菌,其危险性何在?需要对病原菌“地理分布”的概念本身作一正确的评价,并要更精确的考虑病原菌在一地区内的《分布速率》。随着国内的实施检疫措施防止马铃薯癌肿病,就应该考虑更广泛的应用这一成功的原理。小麦矮腥黑穗病是一种既可种传又可土传的病原菌,现已传入瑞典的某些地区,防止它从感染地区进一步扩展是重要的,必须防止从其它国家从新引入此菌。甘兰黑胫病 Phoma lingam(Tode ex Fr.)Desm.为种子带菌,其有性世代.Leptosphaeria maculans(Desm.)Ces.& de Not.也能借空气
1. What is the danger of introducing pathogenic bacteria that have occurred in the EPPO region? The concept of “geographical distribution” of pathogens should be properly assessed and the “rate of distribution” of pathogens within a region should be taken into account more accurately. With the domestic implementation of quarantine measures to prevent potato cancer disease, we should consider the more successful application of this principle. Wheat dwarf disease is a pathogenic bacterium that can be both germ-on and soil-borne and is now introduced into certain areas of Sweden to prevent it from further spreading from infected areas. It is important to prevent the reintroduction of this bacterium from other countries . Leptosphaeria maculans (Desm.) Ces. & De Not. Also available in the air