What's eating my japanese cedar bonsai?

Japanese Cedar bonsai are most vulnerable to spider mites, which cause bronzing and needle drop — especially in hot, dry conditions. Scale insects and bagworms are secondary threats outdoors. Regular foliage misting and good airflow significantly reduce risk. Check foliage closely from late spring through summer.

Bronze or yellow stippling on needles, fine webbing, and premature needle drop — worst in warm, dry summers Mist foliage regularly; treat with neem oil or dedicated miticide (not insecticidal soap alone, which is less effective on mites); repeat every 5–7 days

White or brown waxy shells on stems and foliage; sap loss leads to yellowing, sticky honeydew, and sooty mold Wipe off with alcohol-soaked cloth or soft brush; spray with horticultural oil; treat dormant wood in late winter for best results

Silken bags hanging from branches, inside which caterpillars eat foliage — can defoliate whole sections if unnoticed Hand-remove and destroy bags in late winter; spray Bt on young caterpillars in late spring to early summer