Record Display for the EPA National Library Catalog


Main Title Effects of Photochemical Oxidant Injury of Ponderosa and Jeffrey Pine on Susceptibility of Sapwood and Freshly Cut Stumps to Fomes annosus.
Author James, R. L. ; Cobb, Jr., F. W. ; Wilcox, W. W. ; Rowney, D. L. ;
CORP Author California Univ., Berkeley. Dept. of Plant Pathology.;Corvallis Environmental Research Lab., OR.
Year Published 1980
Report Number EPA-68-03-0273; EPA-600/J-80-408;
Stock Number PB83-219857
Additional Subjects Tolerances(Physiology) ; Fungi ; Air pollution ; Pine trees ; Oxidizers ; Photochemical reactions ; Infectious diseases ; Plant diseases ; Decay ; Correlation ; Regression analysis ; Plant pathology ; Foreign technology ; Fomes annosus
Library Call Number Additional Info Location Last
NTIS  PB83-219857 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 7p
Ponderosa and Jeffrey pine sapwood samples and freshly cut stumps from trees with different amounts of oxidant injury were inoculated with Fomes annosus. With stumps, percentage of surface cross-section area infected and extent of vertical colonization were determined 1 mo and 6-10 mos after inoculation, respectively. Increase in surface area infection with increased oxidant injury, expressed as upper-crown needle retention was statistically significant for ponderosa pine (P=0.01), but was not for Jeffrey pine. Also, the rate of vertical colonization was greater in stumps from severely oxidant-injured trees than in those from slightly injured trees. The relationship between injury and colonization was significant for Jeffrey pine (P=0.05) and for ponderosa pine at one site (P=0.03), but nonsignificant (P=0.18) for ponderosa pine at a second site. Increased susceptibility of stumps to F. annosus appeared to be associated with decreased oleoresin exudation and decreased colonization by other fungi (especially Trichoderma spp. and blue stain fungi). (Copyright (c) 1980 The American Phytopathological Society.)