Young branch cankers are smooth, reddish brown, and slightly constricted. Foliage on girdled branches turns yellow and finally brown. Same as for Cypress, Monterey . Cankers on branches and main trunk slowly expand, girdling and killing the infected part. Gumming also occurs.
Fungus enters through wounds and uninjured bark.
Favored by high temperatures. In summer, prune out dead branches well below any visible infection. Do not plant these cypresses, particularly in warm areas. Frequent watering and fertilization favor disease development. Entire leaf may turn yellow and red and fall off.