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Blight |
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blight, general term for any sudden and severe plant disease or for the agent that causes it. The term is now applied chiefly to diseases caused by bacteria (e.g., bean blights and fire blight of fruit trees), viruses (e.g., soybean bud blight), fungi (e.g., chestnut blight), and protists (e.g., potato blight). Other plant afflictions (caused by insects or unfavorable climatic conditions) that display similar symptoms are also called blights. See diseases of plants diseases of plants. Most plant diseases are caused by fungi, bacteria, and viruses. Although the term disease is usually used only for the destruction of live plants, the action of dry rot and the rotting of harvested crops in storage or transport is similar
..... Click the link for more information. . blightAny of various plant diseases whose symptoms include sudden and severe yellowing, browning, spotting, withering, or dying of leaves, flowers, fruit, stems, or the entire plant. Usually the shoots and other young, rapidly growing tissues of a plant are attacked. Most blights are caused by bacteria or fungi (see fungus); some result from drought. Fungal and bacterial blights are most likely under cool, moist conditions. Most economically important plants are susceptible to one or more blights. Measures taken to fight blight include destroying the infected plant parts; using disease-free seed or stock and resistant varieties; rotating crops (see crop rotation); pruning and spacing plants for better air circulation; controlling pests that carry the fungus from plant to plant; avoiding overhead watering and working among wet plants; and, where needed, applying fungicides or antibiotics. Maintaining sanitary conditions is the most important measure for stopping the spread of the infestation. See also chestnut blight. blight [blīt] (plant pathology) Any plant disease or injury that results in general withering and death of the plant without rotting. blight In plants, a fungus disease causing them to wither. Blight an injury to a plant caused by intense sunlight or contrasting temperatures. Blights also include diseases caused by certain fungi, for example, Monilia cinerea, and by bacteria, for example, Bacterium amylovorum; such blights are infectious. Injuries caused by the incorrect use of pesticides are often called blights. Blights result in the withering of parts of the bark, shoots, leaves, and flowers. They often kill plants. Coating tree trunks and thick branches with milk of lime is recommended for the control of sun and heat blights. Infectious blights can be controlled through the use of insecticides, fungicides, or bactericides and by pruning and burning affected plant parts. The instructions for the use of pesticides must be carefully followed to prevent the pesticides from blighting the plants. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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No references found | Young Blight made a great show of fetching from his desk a long thin manuscript volume with a brown paper cover, and running his finger down the day's appointments, murmuring, 'Mr Aggs, Mr Baggs, Mr Caggs, Mr Daggs, Mr Faggs, Mr Gaggs, Mr Boffin. Only a very few days more - appallingly few to the hearts which had set themselves bravely to hope against hope - three weeks, a month later, perhaps, the name of ships under the blight of the "Overdue" heading shall appear again in the column of "Shipping Intelligence," but under the final declaration of "Missing. O King of blight and sorrow, send me not away till I have brought back the light and joy that will make your dark home bright and beautiful again. |
Blight |
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