将进口粮食中截获的杂草种子种植于隔离的自然环境中,观察自然环境下外来杂草的存活情况:在一个生长季种植的21科97种9152粒杂草种子中,有13科85种640粒种子最终存活,种类存活率达到87.6%,种子数量存活率达到7.0%;有超过一半种类的杂草种子存活率在0%~50%之间,处于中低存活水平。在此基础上,提出进口粮食的监管过程中,在严防撒漏的同时,要特别注意加强监测,尤其在杂草成熟前采取防除措施,是防止疫情扩散的关键环节。 The weed seeds intercepted in imported grain were planted in isolated natural environment and the survival of exotic weeds in natural environment was observed. Of the 21 families, 97 species, 9,152 weeds, grown in one growing season, 85 species 640 seeds eventually survived, the species survival rate reached 87.6%, the seed number survival rate reached 7.0%; more than half of the species of weed seeds survival rate between 0% to 50%, at low to medium survival level. On the basis of this, when putting forward the regulatory process of importing food, we should pay special attention to strengthening monitoring, especially taking control measures before the weeds mature, while preventing spills. It is a key link in preventing the spread of the epidemic.