''Ramularia necator'' is a

fungal A fungus ( : fungi or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms. These organisms are classified as a kingdom, separately from th ...

plant pathogen infecting coconut palms.

References

Fungal plant pathogens and diseases Coconut palm diseases necator {{fungus-plant-disease-stub