So far, my understanding is that:
- HLB (the Citrus Greening Disease virus) affects certain members of the Rutaceae family, especially those in subfamily Aurantioideae.
- Being a member of the Rutaceae family is not a precondition for HLB susceptibility.
- There are only a few known vectors (carriers) of HLB.
- There are many host plants for the vectors. Most recently edible figs have been added (see 3435 Asian Citrus Psyllid -- State Interior Quarantine).
- Being a host plant is not a precondition of HLB susceptibility.
- There is no report from a plant pathologist of a Casimoroa being infected with HLB.
Corrections are welcome!