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a cloth used for dusting furniture, etc.



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.


References in periodicals archive ?
Because cleaning tools such as mops, brooms and dust cloths get disgusting after use, they are not always welcome in the home.
Charles's subject matter includes plastic shopping bags, bars of soap, water glasses (empty or filled with milk), bottles, kitchen scrubbers, tea towels, dust cloths, scrubbing brushes, knitting yarn (sometimes tangled), and flies (and their shadows).
SOME brands of baby wipes - Huggies, for instance - can be washed and reused as dust cloths.
Endust Dust Cloths with Endust Dusting and Cleaning Spray work together to make dusting a quick, easy, three-step process: spray, dust and toss.
The line includes several exclusive products, such as a microfiber telescopic duster that swivels, flexes and also accepts disposable electrostatic dust cloths.
Find microfiber dust cloths ($5), mops ($20) and other cleaning gear at most discount stores.
Use dampened dust cloths to clean desks and other surfaces to keep dust from becoming airborne.
In one magazine, instructions were given "on how to make a wornout pair of men's long johns into two sanitary napkins, one bra, two dust cloths .
NOW, after seeing how the pleasure-seeking "Easy Rider" Leach family live, she has ditched her dust cloths and transformed herself into a tattooed Hell's Angel wannabe.
NylongeeIUs line of products includes cellulose sponges, scrub sponges, sponge block, sponge cloth, dust cloths and vinyl gloves.
At the same time, the sudden and dramatic rise in popularity of disposable cleaning products -- from microfiber dust cloths to wet floor cleaners -- is both adding competition and spurring awareness.
The product is available in a starter kit, which includes one sweeper and 10 dust cloths with a suggested retail price of $14.