What's eating my arizona cypress 'blue ice'?

Arizona Cypress 'Blue Ice' shares the species' pest profile but is noted as having particularly good overall resilience. Cypress bark beetles on drought-stressed trees remain the chief concern. Bagworm, scale, and spider mites may occasionally appear. Keeping the tree adequately watered in its establishment years prevents most problems.

Larvae bore under bark of weakened or drought-stressed trees; pitch tubes at entry points; branch dieback progressing from stressed areas. Prioritise watering during establishment; apply preventive pyrethroid to trunk and scaffold branches in spring; remove dead wood promptly.

Silken bags on branches containing defoliating larvae; brown dead patches in summer; severe infestations kill whole branches. Hand-remove bags in winter; spray Bt on young larvae in late spring; use spinosad or permethrin for older caterpillars.

Waxy armoured scales on stems and bark; honeydew and sooty mould; persistent infestations cause dieback and reduce ornamental appeal. Horticultural oil at crawler emergence in spring; systemic drench for heavy infestations; cut out and destroy badly scaled shoots.