wildfire

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wildfire

1. a highly flammable material, such as Greek fire, formerly used in warfare
2. lightning without audible thunder
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Wildfire

 

an infectious disease of tobacco and Indian tobacco caused by the bacterium Pseudomonas tabacum. Wildfire is characterized by the appearance of numerous pale yellow chlorotic spots, reaching 2 cm in diameter, on the leaves and, sometimes, on the sepals and pods. The diseased areas desiccate in dry weather and rot in humid weather, which often leads to the perforation of the leaves. The causative agent of wildfire enters the plant through the stomata and damaged tissues. The bacterium is preserved in dust that has settled in drying sheds or clinged to seeds and to greenhouse stock; it is also preserved in the unrotted remains of a harvest. Wildfire decreases harvests by 40 to 50 percent. Prices for tobacco leaves drop by 80 percent when the leaves are diseased.

Control measures include using liquid disinfectants on seeds, disinfecting greenhouse stock, spraying seedlings with Bordeaux mixture during the phase of two true leaflets, and growing resistant varieties. The application of potash fertilizers and autumn plowing are also recommended.

REFERENCES

Grushevoi, S. E. Bolezni tabaka i sistema meropriiatii po bor’be s nimi. Moscow, 1950.
Leonov, I. P., A. G. Petrenko, and G. M. Psarev. Posobie dlia tabakovodov. Moscow, 1968.

S. E. GRUSHEVOI

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

wildfire

[′wīl‚fīr]
(plant pathology)
A bacterial disease of tobacco caused by Pseudomonas tabaci and characterized by the appearance of brown spots surrounded by yellow rings, which turn dark, rot, and fall out.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
In late 1995, the group produced the first interagency policy of its kind, the Federal Wildland Fire Management Policy.
Tending Fire; Coping with America's Wildland Fires by Stephen J.
But so far, wildland fires haven't devoured as many acres as last season, according to data from the National Interagency Fire Center, based in Boise.
Oklahoma City, OK, May 26, 2011 --(PR.com)-- Chloeta Fire, LLC, a wildfire management company out of Oklahoma City, provided one crew of wildland fire personnel to voluntarily assist with operations for search and rescue in Joplin, MO.
The commissioners voted 3-1 to develop a program that shows residents in wooded areas what to do around the house to protect themselves, their neighbors and firefighters from a wildland fire.
The 2000 wildland fire season in the United States was among the worst in modern history.
Information on reducing wildland fire hazards will be presented.
And, as soon as the final wisps of smoke started to dissipate, the nation began to redefine its role in wildland fire protection.