Fungal Plant Pathogens
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A fungal plant pathogen damages crop or ornamental plants by direct tissue decay, by producing toxins, or both, sometimes causing widespread agricultural loss.
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Dutch elm disease, caused by a fungus vectored by elm bark beetles, blocks a tree's vascular system and has devastated elm populations.
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A fungal pathogen's toxin can damage a crop's quality where the fungus itself destroys little plant tissue.