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9 Cards in this Set
- Front
- Back
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What causes Indian Hawthorne leaf spot?
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Entomosporium maculatum
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What is a spot?
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a symptom of disease characterized by a limited necrotic area, as on leaves, flowers, and stems
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What is blight?
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sudden, severe, and extensive spotting, discoloration, wilting, or destruction of leaves, flowers, stems, or entire plants
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What is a gall?
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abnormal swelling or localized outgrowth, often roughly spherical, produced by a plant as a result of attack by a fungus, bacterium, nematode, insect, or other organism
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What is wilt?
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drooping of leaves and stems from lack of water (inadequate water supply or excessive transpiration);
vascular disease that interrupts normal water uptake |
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What is mosaic/mottling?
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disease symptom characterized by non-uniform coloration, with intermingled normal, light green and yellowish patches, usually caused by a virus; often used interchangeably with mottle
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What is stunting?
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reduction in height of a vertical axis resulting from a progressive reduction in the length of successive internodes or a decrease in their number
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What is canker?
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a plant disease characterized (in woody plants) by the death of cambium tissue and loss and/or malformation of bark, or (in non-woody plants) by the formation of sharply delineated, dry, necrotic, localized lesions on the stem; "canker" may also be used to refer to the lesion itself, particularly in woody plants
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What is girdling?
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to circle and cut through a stem or the bark and outer few rings of wood, disrupting the phloem and xylem
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