duster

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duster

a cloth used for dusting furniture, etc.

Duster

 

a machine or device for applying powdered dry pesticides to crops to protect them against pests and disease. Tractor-mounted or knapsack manual dusters are used, depending on conditions.

Tractor-mounted dusters are used to dust field crops, orchards, vineyards, and forest tracts. The working members are driven by a power takeoff shaft from the tractor engine. The operating width depends on the design of the duster; for vineyards it covers two to four rows, and for field crops, 10–100 m. Rated performance is from 3.5–5.0 to 30–64 hectares per hour.

Table 1. Main drying oils and their uses
1 mixture of polymerized and dehydrated oils is used *White spirit is the solvent ‘Content of alkyd resin, which has a fat content of 59–65%
NameType of oilProcessing methodOil content (percent)Uses
Natural.............DryingPartial polymerization100Preparation of primers, putty, oil paints (concentrated and thinned to working consistency); treatment of wood surfaces and other porous materials
Compound...........Drying or semidryingPolymerization and dehydration170–732Preparation of concentrated oil paints
Seminatural (for example, oxole) ............Drying orsemidryingPolymerization50–552Dilution of concentrated oil paints to working consistency
Alkyd (glyptal, pentaglyptal).Drying502,3Preparation of oil paints (concentrated and thinned to working consistency)

Knapsack dusters are used to treat vineyards, young fruit plantings, berry patches, vegetable fields, and other crops on small and inaccessible plots. The main units of such a duster are a tank with a feed device, a fan with a drive handle, and a tube with a spray nozzle. It has shoulder straps for carrying. Some knapsack dusters have a bellows instead of a fan for spraying the pesticide.

All dusters have the same principle of operation. The powder is fed from the bin or tank into a mixing chamber, and then it is forced by a stream of air created by the fan or bellows through the spray nozzle and out onto the plants.

G. P. SHAMAEV

References in classic literature ?
SHE ties him up in the duster, and tosses it about like a ball.
He dropped the duster with a startled exclamation, for Annette had suddenly burst into a flood of tears.
Have you forgotten the duster that was over these things, Bunny?
Bishopriggs, waving temptation away from him with the duster.
Bishopriggs tucked his duster under his arm, and proceeded to satisfy Anne that he shared the landlady's view of her position, without sharing the severity of the landlady's principles.
With these disjointed exclamations, Newman wiped his own eyes with the afore-mentioned duster, and, limping to the street-door, opened it to let her out.
Bessy; don't let 'em come up the door-steps; Sally's bringing the old mat and the duster, to rub their shoes.
Mrs Nubbles ironed away in silence for a minute or two, and coming to the fireplace for another iron, glanced stealthily at Kit while she rubbed it on a board and dusted it with a duster, but said nothing until she had returned to her table again: when, holding the iron at an alarmingly short distance from her cheek, to test its temperature, and looking round with a smile, she observed:
Small Business Administration, and Ginger Lew, senior adviser to the White House National Economic Council and to the SBA administrator, on the topic of regional innovation dusters and their past, present and future.
The new and improved Swiffer Dusters clean better than a dry dust cloth and are coated with Dust-Lock Adhesive that combines textured dusting strips with thousands of dust locking fibers to clean better than a regular dry cloth, even in tight and hard to reach places.
The Freeman family, from Tonypandy, who were flying out to Lanzarote from Cardiff said they would not be bringing knuckle dusters or flick knives back as souvenirs.
6-litre 105bhp petrol for entry level Dusters and a 1.