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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 It might be outdated or ideologically biased.



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.


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.


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


(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 ?
Suppression costs are a simple way to measure wildfire costs, but they do not reflect the full cost of wildfires.
Such a budgeting system makes no sense, especially when, as has increasingly been the case in recent years, the cost of fighting fires consumes funding that's supposed to be used to treat forests to make them less vulnerable to wildfires and to counter the increasing effects of climate change.
Several factors enable wildfires to start easily and spread quickly at this time, including the lack of green vegetation, abundance of available fuels such as dry grass and leaves, warm temperatures and wind.
The small reductions in birth weight attributed to the wildfires are unlikely to have serious health effects in any given individual.
In all, the Russian Far East has had 1,750 wildfires this season on the total area exceeding 919,000 hectares, among them 720,200 hectares of forests.
The agency noted that wildfires usually occur during this time of the year.
Guy Carpenter & Company LLC has been named the sole reinsurance intermediary for the newly formed California Wildfire Fund, which is currently being administered by the California Earthquake Authority.
Release date- 05082019 - SAN FRANCISCO - With the goal of helping further reduce wildfire risk, Pacific Gas and Electric Company (PG&E) recently completed significant upgrades to its Wildfire Safety Operations Center (WSOC).
The wildfires have been devastating Siberia since last week.
The current system pushed PG&E to seek bankruptcy protection in January, as it faced liabilities in excess of $30 billion related to the deadliest wildfires in the state's history.