wildfire


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wildfire

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

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

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.
References in classic literature ?
For which reason I advise you to let me sell Wildfire.
And take care to keep sober to-morrow, else you'll get pitched on your head coming home, and Wildfire might be the worse for it.
One of those fits of yearning was on him now, and it would have been strong enough to have persuaded him to trust Wildfire to Dunstan rather than disappoint the yearning, even if he had not had another reason for his disinclination towards the morrow's hunt.
I observed also that there was a place at the farther side of it that went in further, but was so low that it required me to creep upon my hands and knees to go into it, and whither it went I knew not; so, having no candle, I gave it over for that time, but resolved to go again the next day provided with candles and a tinder-box, which I had made of the lock of one of the muskets, with some wildfire in the pan.
Leaning her head against the chimney-piece, with a great assumption of dignity and refinement of manner, sat an elderly female, in as many scraps of finery as Madge Wildfire herself.
Their first care was to get something that would soon take fire, but, after a little search, they found that would be to no purpose; for most of the houses were low, and thatched with flags and rushes, of which the country is full; so they presently made some wildfire, as we call it, by wetting a little powder in the palm of their hands, and in a quarter of an hour they set the town on fire in four or five places, and particularly that house where the Indians were not gone to bed.
Alberta s dedicated wildland firefighters protected people and property during one of the busiest wildfire seasons on record.
Wenatchee has been selected as one of three communities across the nation that applied to receive technical assistance under a new program that helps reduce wildfire risk and costs.
In 2012--one of the most devastating wildfire years in memory--more than 9 million acres of federal, state, local and private land burned up in the United States.
At one time, wildfires were more likely to start in the late summer and early fall-and you could warn homeowners about the approaching 'wildfire season,'" said Christie Alderman, new products and services manager for Chubb Personal Insurance.
nearly 4 percent are at high or extreme risk of wildfire.
Cirque du Soleil among first brands to leverage Wildfire to launch new mobile-optimised campaigns