Staining ability of various sapstaining fungi on jack pine short log sections
2001
Yang, D.Q.
Ceratocystis and Ophiostoma species are common fungi that cause wood sapstain worldwide. The staining ability of these fungi on wood wafers of different wood species has previously been investigated and the results were published. The present study was conducted to evaluate the growth and stain intensity of 20 isolates of 6 sapstain fungi on jack pine short log sections (billets) under natural environmental conditions. Ceratocystis coerulescens, Ceratocystis piceaperda, Ophiostoma ips, Ophiostoma minus, Ophiostoma piceae, Ophiostoma piliferum isolated from logs and lumber of various softwoods across Canada were evaluated. The results showed that most of these species caused dark black discoloration of wood, except O. piceae, which caused a brownish stain on this wood species. O. minus rapidly colonized the billets in all three directions, longitudinal, tangential, and radial. O. piliferum, C. coerulescens, and certain isolates of C. piceaperda displayed moderate growth rates. O. ips and O. piceae grew slowly on billets of jack pine, especially in the radial direction. Information provided in this paper will help develop more effective control strategies for sapstain prevention in jack pine.
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