Tree Disease Concepts
An update to various tree disease concepts in relation to urban and forest management practices, this work relates disease problems to current environmental concern over forest decline with emphasis on biological understanding and ecological considerations.
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Forest Pathology in Relation to Plant Pathology
Proof of Pathogenicity
SOIL CONDITIONS AFFECTING TREE HEALTH
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abiotic acid agents air pollution Annu areas Armillaria Ascomycotina ascospores associated bacteria bark basidiospores beech beetles biotic blight blister rust branches brown rot cambium canker fungi caused cell wall cellulose Chapter chemical conidia conifers crops decay fungi decline disease dieback disease cycle Dutch elm disease effects environmental enzymes epidemic factors Figure foliage diseases forest pathology fruit bodies fungus gall genetic growth hardwoods heart rot host hyphae increase infection inoculum interaction invade invasion involves leaf lignin maple moisture mycorrhizae needles nematodes nitrogen nursery nutrients oak wilt occur organisms parasitic pathogen pathologists phloem Phytopathol Phytopathology plantations population problem produce recognize reduce resistance result root disease root rot rot fungi saprobic Scleroderris canker seed seedlings soil species spores stain stem structure surface symptoms temperature tissue TREE DISEASES USDA virus viruses western white pine white pine white rot WILT DISEASES wood decay wounds xylem