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1. a highly flammable material, such as Greek fire, formerly used in warfare
2. lightning without audible thunder



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.



(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.
References in periodicals archive ?
Jennie Griffiths, from South Wales Fire and Rescue Service's control room, said they were initially called to a grass fire at about 1.
Yesterday, a large-scale grass fire broke out at Wet-stone Lane, Caldy, near the Royal Liverpool course.
A spokesman for Northumberland Fire Service said: "We received reports of a grass fire just after 2.
A city Fire Department helicopter bombs a fast-moving grass fire with ater Monday in a fight that protected homes in West Hills.
The grass fire at Bidston Hill, and, | left, firefighters at the scene PICTURES SUBMITTED BY AN ECHO READER
Mid and West Wales Fire Service (MWWFS) was called out to deal with a grass fire in the Abergwesyn area on Wednesday as well as fighting fires in Fforestfach and the Swansea Vale area on Thursday.
FIRE crews responded to 910 grass fires across South Wales yesterday, and were even attacked at one incident.
This was our first major grass fire of the summer sparked by the dry spell.
An intoxicated man with a distress-signal flare gun started a wildfire south of Quartz Hill, and Lancaster's municipal fireworks show started a grass fire that briefly closed the Antelope Valley Freeway.
The incident follows the loss of a Bedworth fire engine when it was engulfed in flames during a deliberate grass fire in Nuneaton earlier in the week.
Owosso Drive and Copping Street, Eugene, grass fire, no damage.
Firefighters tackle a grass fire blaze on Maerdy moun-|tain MATTHEW HORWOOD