Management of cypress canker is the responsibility of the land owner/manager.
In significantly affected trees, replacement with known tolerant cypress species or varieties (see above) may be the only long-term option.
Cypresses can also be replaced with unrelated plant species, such as Australian natives, including for use as shelterbelts.
In re-planted or existing cypresses, canker damage can be minimised by ensuring trees are well-sited and well-managed; for example:
Avoid planting susceptible species on disease-prone sites, such as those with high levels of nitrogen.
Keep trees healthy to improve their natural defences against an initial infection. If fertilisers are required, they should be evenly distributed around the drip line of the trees. Watering may be needed during dry spells.
Reduce the chances of branch or stem wounding e.g. by fencing off trees from livestock.
Prune infected branches a minimum of 10 centimetres below the canker to help prevent infection spreading to the main stems (but take care not to over-prune). Pruning should preferably be done in winter or following dry weather, when spores are less likely to infect pruning wounds. After pruning, wound dressings may help to prevent spore infection. All pruning tools should be sterilised before and after use with either alcohol or dilute bleach.
Remove and destroy severely diseased plants by deep burial or burning to help to reduce the risk of neighbouring trees becoming infected.