一直以来,美国果农都担心橘树根枯病会“袭击”自己的果园。但现在,这种毁灭性病原体或许成了他们战胜另一种更严重柑橘疾病的最大希望。后者横扫了该国南部橘园,让大量果园荒芜。位于佛罗里达州的农业公司———南方花园柑橘,已经向美国农业部申请使用一种经基因改良的橘树根枯病病毒(CTV),攻击引发柑橘黄龙病的细菌。在过去10年间,柑橘黄龙病已经导致 All along, the U.S. farmers have worried that the root blight of the tree will “attack” their own orchards. But now, such devastating pathogens may be their greatest hope in overcoming another more serious citrus disease. The latter swept across the Orangery in the south of the country, leaving large orchards deserted. Southern Florida Citrus, an agricultural company in Florida, has applied to the USDA for a genetically modified CTV that attacks the bacteria that cause Citrus Huanglongbing. Citrus Huanglonglong has been caused in the past 10 years