What is "phytomonas"

Phytomonas is a genus of trypanosomatids that infect a variety of plant species by an insect vector. There are only two species that are known to cause disease in their hosts (P. staheli which causes wilt in coconut and oil palms and P. leptovasorum which causes coffee phloem necrosis); The rest of the genus is thought to be nonpathogenic.