The truck slid to a stop in the yard, spraying gravel and dust.
One of the most p im ortant ways of keeping insect pests in check is by " spraying " or " washing."
The results and history of this essential method of treatment are embodied in Professor Lodemann's work on the Spraying of Plants, 1896.
The chief method employed for their destruction is spraying the swarms with arsenic. The districts with the greatest area under cultivation are Heidelberg, Witwatersrand, Pretoria, Standerton and Krugersdorp. The chief crops grown for grain are wheat, maize (mealie) and kaffir corn, but the harvest is inadequate to meet local demands.
Another defect arising during curing and fermentation is the efflorescence of salts on the surface, a phenomenon known as " saltpetre "; light brushing and spraying with a weak solution of acetic acid are effective remedies.
Many remedies for this disease have been suggested, including total submersion of the vineyards, the use of carbon bisulphide for spraying, and of copper salts, but there appears to be little doubt that a really serious epidemic can only be dealt with by systematic destruction of the vines, followed by replanting with resistant varieties.
The most effective cure, short of destruction and replantation, appears to be spraying with finely divided sulphur.
Since then oidium has reappeared from time to time, but the remedy of spraying with finely divided sulphur, which was discovered at the time of the epidemic, has enabled the wine farmers to keep it under.
The means of mitigating the damage done by this disease are (i) the selection of varieties found to resist its attacks; (2) the collection and destruction of diseased tubers so that none are left in the soil to become a menace to future crops; (3) care that no tubers showing traces of the disease are planted; (4) spraying with Bordeaux mixture at intervals from midsummer onwards.
The parasite may be held in check by spraying with Bordeaux mixture early in the season.
The earliest attempts at enrichment by oil gas consisted in spraying oil upon the red hot mass in the retort during carbonization; Enrich- but experience soon showed that this was not an econo- meat by mical method of working, and that it was far better to oil gas.
The car spun around at the bottom of the hill, spraying gravel in a wild circle.
Cynthia slammed the shaker on the counter, spraying salt on the floor.
The warriors regained themselves first and crossed to the edge of the canyon, unaffected by the water spraying on them.
Imposing columns and pillars of ice were visible everywhere—massive icicles and mounds, built up from the spraying water tapped from the piping that paralleled the penstock.
The window ruptured, spraying glass across the kitchen floor.
The procedure consists in most cases in spraying the affected plants with poisonous solutions or emulsions, or in (lusting them with fungicidal or insecticidal powders, or applying the fumes of lethal gases.
Spraying, &c.See Lodeman, The Spraying of Plants (1896), and numerous references in the publications of U.S. Agricultural Department, Zeitschr.
As a preventive repeated spraying with dilute Bordeaux mixture is recommended, during the flowering season and early development of the fruit.
Similar spraying is recom- (From a specimen in the British Museum.) mended for pear-leaf blister Pear Scab (Fusicladium pyrinum).
In 1894, at Cambridge, the awards were for fixed and portable oil engines, potato-spraying and tree-spraying machines, sheep-dipping apparatus and churns.
To check them, " grease-banding " round the trees has been adopted; but as many other pests eat the leafage, it is best to kill all at once by spraying with arsenical poisons.