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五、草本寄主 Yarwood(1963)报导,所有试验的北京柠檬,包括2株不含衰退病毒的树都存在一种能迅速接种到豇豆的病毒,并证明该病毒发现在叶片、茎、花瓣、根和果皮中,但不存在于果汁中。在菜豆、黄瓜、烟草,向日葵、昆诺藜和克利芙兰烟上出现局部斑和系统感染。证明其病毒浓度在豇豆叶片中比柠檬叶中高300倍。接种液中加入磷酸和苄基腺嘌吟,接种前后将指示植物放在黑暗中或叶片迅速干燥都能提高接种效果。其它20种柑桔品种试验,都未发现类似病毒,认为这是北京柠檬的一种潜伏病毒。
V. Herb Host Yarwood (1963) reported that all the tested Beijing lemons, including the two non-recessive viruses, had a virus that rapidly inoculated into cowpea and demonstrated that the virus found in leaves, stems, petals, roots And the peel, but not in the juice. Local spot and systemic infections occur on kidney bean, cucumber, tobacco, sunflower, quinoa and Cleveland tobacco. Its virus concentration proved to be 300 times higher in cowpea leaves than in lemon leaves. Adding inoculation solution of phosphoric acid and benzyl adenine, before and after inoculation will indicate the plants in the dark or rapid drying leaves can improve the vaccination effect. Other 20 kinds of citrus varieties tested, did not find a similar virus, that this is a latent lemon Beijing lettuce.