Predicting the colonization of Heterobasidion annosum (Fr.) Bref. in thinned, loblolly pine (Pinus taeda L.) plantations on high hazard sites

Annosus root rot caused by the fungus Heterobasidion annosum (fr.) Bref., causes a destructive root and butt rot of many important tree species throughout the world. Presently, methods for determining disease incidence and severity and destructive. In this study, the most effective, non-destructive, disease severity prediction parameters were determined for thinned Pinus taeda plantations growing on high hazard sites. Above-ground tree parameters and 0.03m³ soil-root (SR) samples were used as predictions variables. Base-line data for predictions was obtained by excavations of 190 tree root system from plantations located in Eastern Virginia and Central Alabama. Multiple regression analysis indicated that stem diameter (DBH), radical growth (GR5) live crown ration (LCR), and SR samples were the most effective parameters in explaining the variation in the root sustem colonizatio levels of the plot trees studied.

Name thesis:degree_name

M.S.

Level thesis:degree_level

masters

Discipline thesis:degree_discipline

Plant Pathology and Physiology

Department dc:contributor.department

Plant Pathology and Physiology

Grantor dc:publisher

Virginia Polytechnic Institute and State University

Year dc:date.issued

1983

Author dc:creator

• Kurdyla, Thomas M.

Statement dc:rights

• In Copyright

Licence dc:rights.uri

• http://rightsstatements.org/vocab/InC/1.0/

Language dc:language.iso

en

Handle dc:identifier.uri

http://hdl.handle.net/10919/101214

OAI identifier oai:identifier

oai:vtechworks.lib.vt.edu:10919/101214