Also found in: Dictionary, Thesaurus, Medical, Idioms, Wikipedia.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



a machine or device for atomizing and applying liquid pesticides in the form of solutions, suspensions, and emulsions of varying concentration to plants for the purpose of controlling pests, diseases, and weeds. Sprayers are also used for insect control in buildings.

There are various types of sprayers for treating field crops, orchards, and vineyards. The spraying mechanism may be hydraulic, fan, or aerosol. There are portable sprayers, horse-drawn sprayers, tractor-drawn sprayers (mounted or trailer) and sprayer planes. In hydraulic sprayers, the toxic liquid chemical is fed by pressure to nozzles, in which it is atomized and discharged onto the object being treated. In fan sprayers, the toxic chemical is atomized in nozzles and then expelled by a jet of air onto the object being treated. In some sprayers the stream of air also splits the chemical into even smaller particles.

The basic components and mechanisms of a sprayer are a tank with a stirrer to mix the chemical, a pump to create the pressure necessary to atomize the liquid and give its particles a certain velocity, a fan (in fan sprayers), a hose, a pressure regulator, atomizing nozzles, and a suction cock for reloading the sprayer. A pressure gauge monitors the degree of compression of the liquid. The working elements of tractor-drawn sprayers are driven by a takeoff shaft of the tractor engine. Portable sprayers are operated manually, and horse-drawn sprayers are operated manually or by a special engine. The sprayers on planes are operated by a vane mounted on the aircraft.


Shamaev, G. P., and S. D. Sheruda. Mekhanizatsiia rabot po zashchite sel’skokhoziaistvennykh kul’tur ot vreditelei i boleznei. Moscow, 1964.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
It is equipped with GPS and five different types of electrostatic sprayers suitable for different crops.
Removing the operator from the sprayer eliminates human error, which can lead to overapplication or application in the wrong areas.
With a good sprayer, the farmer can achieve the correct calibration using a measuring jug, establishing the tractor speed, marking out a 50 metre distance and monitoring the time on a watch.The first step is to time the tractor and sprayer combination covering 50 metres.
A prototype blueberry sprayer, complete with air-assist and designed for use in a tunnel with three rows of bushes, is also being trialled.
He added that hand sprayers would be distributed among
The distribution of the spray in the vicinity of the sprayer is often estimated by measuring the air flow generated by the fans.
"Our automated variable-rate air-assisted precision sprayer overcomes this challenge.
1 and 2) the fluid dispersion (g) for each sprayer was calculated by the following relation:
The biem Butter Sprayer allows users to convert a stick of butter from solid to liquid spray in seconds.
Two of the receivers were allocated on the tips of the spray boom and one was allocated in the center of the displacement axis of the self-propelled sprayer. Data collection was parameterized by distance, i.e., altimetry information was collected every 0.10 m.
One large player in the sprayer business was the John Bean Mfg.