Gall Phytophthora pluvialis effeithio ar amrywiaeth o rywogaethau coed, gan gynnwys hemlog y gorllewin, ffynidwydd Douglas a sawl rhywogaeth o binwydd –a chadarnhawyd yr achos cyntaf yng Nghymru yng Ngwynedd fis diwethaf.
Phytophthora pluvialis can affect a variety of tree species, including western hemlock, Douglas fir and several pine species - the first Welsh findingwas confirmed in Gwynedd last month.