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 periodicals archive ?
Aerosol dusters (sometimes known as "canned air") are ubiquitous manufacturing and test aids, used for cleaning off loose contaminants and blowing away dust from electronics, electrical and other products.
The company is also offering an exchange offer of INR10,000 along with a corporate discount of INR7,000 on both the variants for the Gang of Dusters group.
A MAN wearing a knuckle duster claimed he won it in an arm-wrestling competition with Travellers.
The Romanian car maker's success in Britain has been driven by the dirt-cheap and dirt-busting Duster 4x4.
Large windows mean visibility out of the Duster is good.
In a similar instance, French car maker Renault recalled some of its own best selling compact SUV Duster in UK due to a problem with the quality of paint that resulted in premature corrosion on the door sills, bonnet and other areas.
This engine, together with others, is also found beneath the bonnets of the Duster and Logan, with the former being a highly-acclaimed two or four-wheel drive Crossover, whilst the Logan is a roomy estate car costing from just PS8595 in comparison to a whopping PS10,000 more for even the entry-level one-litre Ford Focus Estate.
New Delhi, April 14 -- India has become the fourth largest market for French auto giant Renault's Duster compact SUV, with domestic sales clocking in at 85,974 units since the vehicle's launch in 2012.
Vice president of energy products for Irwin Mine and Tunneling Supply, Pat Rengers, said the company would start producing the rock dusters in the coming week at the Blairsville plant.
That demand is the reason why it has taken until now for the Renault-owned Romanian marque to arrive in the UK with the Sandero supermini and Duster SUV.
Looking into it, we found that the Duster was made for going out into the count, for getting dirty, for climbing mountains," says Fabio Mazia, general director of creativity for Publicis Argentina, together with Marcelo Vergara.
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.