. Injurious insects : how to recognize and control them . Insect pests; Insect pests. TYPES OF NOZZLES 101 from the old form in being much larger, in having a larger orifice, and in relying on the design of the chamber back of the orifice, combined with an interposed plate, to give the finely divided spray desired. It has large capacity, especially when operating under the heavy pressure generated in a power outfit. The tendency to clog is reduced, but luifortunately is not by any means entirely eliminated. At the present stage in designing, it is the most satisfactory and efficient nozzle for
. Injurious insects : how to recognize and control them . Insect pests; Insect pests. TYPES OF NOZZLES 101 from the old form in being much larger, in having a larger orifice, and in relying on the design of the chamber back of the orifice, combined with an interposed plate, to give the finely divided spray desired. It has large capacity, especially when operating under the heavy pressure generated in a power outfit. The tendency to clog is reduced, but luifortunately is not by any means entirely eliminated. At the present stage in designing, it is the most satisfactory and efficient nozzle for ordinary orchard work. Practically all of the manufacturers of spray ajiparatus are making a nozzle of this t^-pe. For special work in spraying shade trees from the ground still another type of nozzle has lately been e\''olved. This is essentially a heavy brass. Fig. 65. —T\-pos of nozzles. On the left, the vermorcl ; in the center, the disk type ; on the right the Bordeaux. Original. tube, from three to six feet in length, with gradually diminishing bore, ending in a simple round orifice, from one eighth to three eighths of an inch in diameter. It is operated under extremely heavy pressure, and sends high into the air a solid stream which breaks into a fairly fine spray as it nears the summit of its are. Naturally the material is delivered at a rapiil rate. The advantage for extensive work on shade trees lies in eliminating the necessity' of climbing the trees, thereby reducing the cost of spraying in spite of the amount of luaterial used. Extension Rods Extension rods are necessary in orchard spraying, in order to elevate the nozzles to a point where the spray can reach the upper parts of the tree. Such rods are of two types: small iron pipe, and luetal-lined bam- boo. Iron rods are more commonly used, and are satisfactory, except. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and app
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsectp, bookyear1912
