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Forest Pathology in Relation to Plant Pathology
Proof of Pathogenicity
ABIOTIC AGENTS OF TREE DISEASES
22 other sections not shown
abiotic agent air pollution areas Ascomycetes ascospores aspen associated bacteria bacterium bark Basidiomycete basidiospores beech beetles biotic blight blister rust branches brown rot cambium canker fungi caused cell wall cellulose Chapter characteristic chemical compliments of Dr conidia conifers crops decay fungi decline disease cycle Dutch elm disease effects environmental enzymes epidemic factors feeder roots FIGURE foliage diseases forest pathology fruit bodies fungicide fungus genetic growth hardwoods heart rot fungi host hyphae increase infection inoculum interaction invasion lignin maple mellea microorganisms moisture mycoplasma mycorrhizae Nectria needle nematodes nitrogen nursery nutrients occur organisms parasitic pathogen pathologists phloem Photograph compliments Phytopathology plant disease plantations population problems produce recognize reduced resistance result root rot sap rot fungi saprophytic seed seedlings soil species spores stain stem structures surface symptoms temperature tion tissue TREE DISEASES urban tree USDA virus viruses western white pine white pine wood decay wounds xylem