Just received this notification today from the CDFA ACP Listserv. This the new action plan for those who live in Tulare County, California, where they have just discovered the ACP:

http://www.cdfa.ca.gov/plant/acp/docs/ACP-TulareCoResponsePlan.pdf

I also read that today on the Kern Citrus & Subtropical Fruit Newsletter. With Mexico on California's southern boarder, HLB is going to come to California sooner or later it is only a matter of time Because HLB does not show up for two years, HLB is more than likely already infecting California trees. . - Millet

Yes, exactly, Millet. Not counting the weird fluke in Los Angeles county, in speaking with both Tracy Kahn and Tom Shea, both felt is actually is probably here, just not yet "found". The state is just too big, and since we have a significant border with Mexico, and so much smuggling across the border, it is simply impossible to keep it out. So, it's a race against time to come up with a viable treatment option before it really spreads.

One thing that is probably saving the commercial citrus industry, is that many if not most commercial growers are already treating for the ACP, so that has protected them. The one thing we learned after the terrible decimation of the Floria commercial citrus industry.

Patty, I added to my above post that HLB is probably already in CA. Then I see your post saying as much. Anyway, CA most certainly must have learned from Florida's mistakes. - Millet

Well, there you go, you're in good, erudite company, Millet. And to add to this, most likely they both feel it will begin in someone's backyard, and not in the commercial fields. I can tell you, the CDFA agents here in San Diego county are not taking this lightly, and if you have ANY suspicions, they will go out and investigate. Not sure how it is in other counties, but probably being the county that borders Mexico, the CDFA agents are trying as hard as they can to catch this as early as possible.

I believe the only option now is to find a cure for the disease. We will never eradicate the insect that spreads the disease.

The thing I find strange is that greening has never been found in Italy or Australia last I checked. It is in Africa, which is to Europe like Mexico is to the US. Australia is remote, but all it would take is a shipment of something carrying the infected insects.

Maybe it is not in Italy (nearest to Africa). for they use Citrus aurantium as rootstock.

Maybe you can choose : Tristezza or HLB ...while there is also no Tristezza in Italy, but maybe just for Citrus aurantium is resistent already ...

The African form of HLB is slightly different from the Asian form. It is only currently present in southern African countries, and the causal bacterium is sensitive to high temperatures and low humidity. This means it is unlikely to naturally cross the Sahara Desert to infect Mediterranean citrus growers.
The North African countries of Tunisia, Algeria and Morocco all have citrus industries. If these were to be infected, HLB would presumably jump the short distance to Spain. However, from a citrus growing viewpoint, Italy is one of the more isolated countries in the Mediterranean region. To the north, there is no significant commercial citrus across its land borders, and southwards, it is quite some distance across the sea to the nearest Tunisian groves.
There is an excellent Spanish research paper about HLB, with lots of interesting images at
http://www.ivia.es/iocv/enfermedades/huanglongbing/HUANGLONGBING.htm
Mike /Citrange

Well, there are small islands that would make the way easy from Africa to Europe.

Just the same way the Arabs went when they conqueered Sicily ...