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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 ?
Another brush fire on Friday overran Interstate 15, north of San Bernardino, destroying four structures and torching 20 vehicles.
Relief could be in sight for fire departments that have been battling brush fires during this spring dry spell.
Seven large brush fires broke out in Greece and hundreds of people were evacuated from threatened homes near the southern city of Pyrgos, 200 miles south-west of Athens.
3, insurers had received about 2,000 claims related to the more than 100 brush fires that ravaged the state of New South Wales and virtually surrounded Sydney, the country's largest city.
True or False: To minimize the chance of a brush fire igniting a nearby building, remove all trees around it.
State Department of Fire Services statistics show that from 2008 to 2012, April has been the month most susceptible to brush fires - many from homeowners whose brush fires got out of control.
1 -- color) A house explodes in the extreme heat of the brush fire on Malibu Road.
Fire Safe California brings public and private sectors together to work on innovative ways to make communities safe from the ravages of brush fire.
Late in the year, high winds knocked down some power lines near the former Egg City plant north of Moorpark, sparking a 13,600-acre brush fire that destroyed five homes.
Coleman said two factors are also worth noting when it comes to brush fires.
At their worst, they turn into giant balls of flames during brush fires, Cole said.