residential citrus as a persistent resevoir of huanglongbing

This is interesting:

Prospects are dim for the ubiquitous backyard citrus orchards of California as residential growers are unlikely to consistently use the pesticides which provide effective control in commercial orchards.^[11]


Basically, regular people with an orange tree will keep the infection and its vectors alive.  Which sucks for the more concerned and thus vigilant industrial growers.

Hey, squirrels keep Bubonic Plague going...