Plant Parasites of Europe

leafminers, galls and fungi

gallers on Chamaecyparis

Dichotomous table for gallers on Chamaecyparis lawsoniana

by Hans Roskam

1a Roots with nodular swellings. Meloidogyne hapla

1b Several twigs constricted, above the infection with expanded, strong swelling of the axis, and exudation of resin. Pestalotiopsis funerea

1c Pycnidia occur on dead twigs; whether the fungus is the cause of death is probable, but not certain. Pestalotiopsis monochaetioides

1d eveloping cones are slightly discoloured and distorted. Inside, seeds are distorted and concave; in each hollow lies a pale yellow, later orange larva, which pupates in a white cocoon in early spring; a cone may contain more than 20 larvae. Cupressatia siskiyou

Last modified 1.vii.2020