Mae rhagor o wybodaeth am sut i adnabod OPM ar wefan Forest Research.  I adrodd am achosion o blâu a chlefydau, defnyddiwch Borth Ar-lein TreeAlert.
Further information on how to identify OPM can be found at the Forest Research website. To report sightings of pests and diseases, use the TreeAlert online portal.