blight

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Related to blights: leaf blight

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 plantsdiseases 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 to the rots
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Blight

A term applied to a deteriorating influence or condition which affects the value of a property or real estate.

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.

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.
References in classic literature ?
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.
Young Blight made another great show of changing the volume, taking up a pen, sucking it, dipping it, and running over previous entries before he wrote.
I don't mind it much,' returned Young Blight, heaving a sigh, as if its bitterness were past.
On this head, young Blight had no doubt whatever, so Mr Boffin made him a present of that sum of money, and thanked him for his attention to his (Mr Boffin's) affairs; which, he added, were now, he believed, as good as settled.
Russia grows between 35 and 40 million tons of potatoes a year but some parts of the country have experienced blights every year for the last decade.
Studies on this and other oak leaf and twig blights are continuing, but as yet no chemical spray has been registered for use.