. An annotated list of the important North American forest insects. Forest insects. 20 FARMERS BULLETIN^ 16 2 3 pressure of at least 300 pounds. This machinery, together with a 400-gallon tank, should be mounted on a well-built truck. (Fig. 15.) High-grade 1-inch spray hose is required, and a nozzle pres- sure of 300 pounds or more is necessary, depending on the length of the hose and the elevation of the nozzle above the level of the sprayer. Machines that will develop 1,000 pounds working pressure are necessary in rough country where extremely long lines of hose are required. A machine of th
. An annotated list of the important North American forest insects. Forest insects. 20 FARMERS BULLETIN^ 16 2 3 pressure of at least 300 pounds. This machinery, together with a 400-gallon tank, should be mounted on a well-built truck. (Fig. 15.) High-grade 1-inch spray hose is required, and a nozzle pres- sure of 300 pounds or more is necessary, depending on the length of the hose and the elevation of the nozzle above the level of the sprayer. Machines that will develop 1,000 pounds working pressure are necessary in rough country where extremely long lines of hose are required. A machine of this capacity equipped with high-pres- sure hose will supply a hose line 5,000 to 6,000 feet in spray satisfactorily at an elevation of 600 feet above the level of the spra3^er. By using a small device, which is attached to the nozzle and is known as a spreader, it is possible to spray low growth very satisfac-. P^iGUKE 15.—Iligb-powcr truck sprayer torily. Fruit trees can be treated very rapidly in this way. (A nozzle equipped with spreader is shown in operation at the left of the picture on front cover.) Tests have been made for several seasons with airships of both the heavier-than-air and lighter-than-air tjqoe, to determine whether infested woodland areas could be dusted satisfactorily and economi- cally by these means. This method has not proved entirely satis- factory for use on forest growth. The cost is high, and the dust does not adhere as well as liquid spray when an adhesive like fish oil is used. For certain low-growing crops that have a high annual value this method has given excellent results in some sections of the country. ilETHODS TO BE USED IN ORCHARDS The methods to be used for controlling the gipsy moth in orchards depend largely on the severity of the infestation. If only a few egg clusters are present in the orchard, the early spraying which is. Please note that these images are extracted from scanned page images that may have been digitally en
Size: 1902px × 1313px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorhopkinsadandrewdelmar, bookcentury1900, bookdecade1900
