Huanglongbing is the awesome name of citrus greening disease.
Its carried by psyllids. the Asian citrus psyllid (Sternorrhyncha: Psyllidae). Can't imagine how that got to California, lol.
Supposedly it could damage Ca's $2e9 citrus crop. Several ag counties are quarantined.
Imagine the bio-vandalism if you were to spread it?
Smack trees with plastic paddles to shake out the bugs onto sheets: catch, (drive and) release.
Also fun with zebra mussells and asian carp in the great lakes region.
"Why no, I don't have any fruits or vegetables with me..." just insects.
Just a gedankenexperiment on the fragility of ecosystems to invasion, the role of mobile vectors like birds, bees, cars, jet planes...