What's eating my chinese swamp cypress?

Chinese Swamp Cypress (Glyptostrobus pensilis) is critically endangered and rarely grown outside botanical gardens. In cultivation it may be affected by scale insects and spider mites. As a wetland tree, it is tolerant of waterlogged conditions; its primary threat outside habitat loss is bark scale and stress-induced secondary beetle attack in drier soils.

Oval brown scale bumps on twigs; yellowing and premature needle drop; honeydew and associated sooty mould. Dormant horticultural oil spray thoroughly applied in late winter. Insecticidal soap spray targeting summer crawlers. Prune out heavily infested twigs.

Bronze stippling and fine webbing on foliage during hot, dry spells; needle drop if infestation goes untreated. Ensure adequate moisture; this species tolerates wet soil, so do not allow drought stress. Neem oil or miticide spray; repeat at 7-day intervals for 3 applications.

Entry holes and resin flow on weakened or drought-stressed bark; larval galleries cause localised dieback. Grow in moist to wet conditions matching natural habitat. Remove and destroy any infested wood promptly. Prioritise site conditions over chemical treatment.