Apr 17, 2012
![This citrus tree's leaves are yellowing due to huanglongbing. This citrus tree's leaves are yellowing due to huanglongbing.](http://ucanr.org/blogs/anrnews/blogfiles/11062.jpg)
This citrus tree's leaves are yellowing due to huanglongbing.
The greatest immediate threat may be to the homeowners of Los Angeles County, 60 percent of who have a citrus tree in their yard, said Elizabeth Grafton-Cardwell, UC Cooperative Extension specialist and research entomologist in the Department of Entomology at UC Riverside and director of Lindcove Research & Extension Center.
The citrus greening bacteria probably spread from the cutting of budwood illegally brought in from outside the country, the article says Grafton-Cardwell said.
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