Beating cypress canker

Aimers-Halliday, Jacqui; Hood, Ian; Gea, Luigi; Low, Charlie; Dibley, Mike; Gardner, Judy; Penellum, Andrea
February 2006
New Zealand Tree Grower;Feb2006, Vol. 27 Issue 1, p10
This article deals with the growing cypress canker problem facing New Zealand growers. Several trees are killed outright, and of those that survive, they develop severe malformations. Two species are the cause of infection-- Seiridium cardinale and Seiridium unicorne, both of which are distributed throughout the country. Once cypress genotypes are identified, genetically superior material can be used via family forestry or clonal forestry. While increased canker resistance is a key objective of clones, other benefits include improved growth and form, and higher wood quality. Hybridisation is another option for delivering resistant genotypes. Some of the 18 species of cypresses in New Zealand seem to be highly resistant to canker.


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