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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.


References in periodicals archive ?
The rulings prohibit Hoffmann from selling, marketing, or displaying to any third party, its self propelled high clearance agricultural crop sprayer.
People in astronaut suits, looking like crop sprayers, coming to take sick people away, or their parents even worse; so you have that deep psychological impact, but also of course, children are themselves dying but not in great numbers fortunately, but we do see every few weeks as the numbers of people are falling ill and dying from Ebola, the numbers of orphans are rising.
scanning device for measuring the liquid distribution in crop sprayers (fragment 1), B group.
Products: Agricultural seed planting and tillage equipment, crop sprayers, finish mowers, dirt-working implements, rotary cutters, utility terrain vehicles and zero turn mowers.
But she said a significant increase in the incidence of prostrate cancer was observed for pesticide applicators - a group that includes farm workers, crop sprayers, greenhouse workers and park keepers.
Melroe manufactures skid-steer and articulated loaders, mini- excavators and self-propelled crop sprayers at plants located in Gwinner and Bismark, N.
Twenty Working Groups (WG) undertake surveys and hold discussions on various problems such as agricultural engineering university curricula harmonization: cooperation for the development of indigenous technology in developing countries: and international basic minimum functional requirements for crop sprayers and test procedures to check their fulfillment.
He blithely ignored the fact that I had been at this golden acre's biggest social gathering for years: hundreds of flat caps, Barbours and green wellies following a fast-talking auctioneer round a field as he knocked down lines of parked crop sprayers, tractors and even a pounds 21,000 combine harvester ("fully taxed and MoT, as new, one careful lady owner") to the highest bidders.
Why did the authorities not use aerial crop sprayers and disinfect an area of around 10 or 20 miles of the first outbreaks?