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Cypress canker wound inoculation trial

Scion is the leading provider of forest-related knowledge in New Zealand
Formerly known as the Forest Research Institute, Scion has been a leader in research relating to forest health for over 50 years. The Rotorua-based Crown Research Institute continues to provide science that will protect all forests from damage caused by insect pests, pathogens and weeds. The information presented below arises from these research activities.

From Forest Health News No. 42, May 1995.

Early results (9 weeks after inoculation) from a wound inoculation trial on macrocarpa, lusitanica, and leylands have indicated that there may be between and within species differences in host resistance to cypress canker pathogens Seiridium unicorne and S. cardinale. Leylands and lusitanica scored better that macrocarpa, with some hybrid clones scoring best of all. Differences in pathogenicity between the fungi were even more apparent, S. unicorne caused larger cankers, S. cardinale more dieback (these symptoms are effected by different mechanisms). Therefore comparative assessments of canker in provenance trials and plantings should score both dieback and cankers.

(Mark Self)

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(Scion is the trading name of the New Zealand Forest Research Institute Limited.)


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