Gwyddys mai’r sborau byr eu hoes sy’n cael eu cynhyrchu ar ddail coed ynn yw un o brif ffynonellau’r haint felly mae’r mesurau rheoli cychwynnol yn canolbwyntio ar osod cyfyngiadau ar symud planhigion coed ynn tan inni benderfynu beth i’w wneud yn y tymor hir.  Rhag i ddail ar y llawr ledaenu’r haint, cynghorir pobl i lanhau eu hesgidiau’n drylwyr ar ôl cerdded rhag iddynt gario dail heintiedig i safleoedd newydd.
It is known that the short lived spores that are produced from ash leaves are a main cause of infection so initial control measures have been focussed on preventing the movement of ash plants whilst a longer term approach is agreed. In order to restrict the spread from fallen leaves our advice is that people should clean their shoes carefully after walking in woodland to lessen the risk of transferring infected leaves to new locations.