File:Control of the Japanese beetle on fruit and shade trees (1932) (20504217680).jpg

Title: Control of the Japanese beetle on fruit and shade trees
Identifier: controlofjapanes237vanl (find matches)
Year: 1932 (1930s)
Authors: Van Leeuwen, E. R
Subjects: Japanese beetle Control; Fruit Diseases and pests; Trees Diseases and pests
Publisher: Washington, D. C. : U. S. Dept. of Agriculture
Contributing Library: U.S. Department of Agriculture, National Agricultural Library
Digitizing Sponsor: U.S. Department of Agriculture, National Agricultural Library

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6 CIRCULAR 2 3 7, U. S. DEPARTMENT OF AGRICULTURE added. The proportions of the materials in this mixture are as follows: Pounds Finely ground sulphur 8 Hydrated lime 4 Calcium casemate % All dry materials should be mixed in pails or buckets before being placed in the spray tank. Whenever flour is used, all the dry mate- rials should be thoroughly mixed before any water is added; other- wise the flour will lump badly and cause difficulty during the spray operation. A small quantity of water should be added first and the mixture again stirred, after which sufficient water is added to make a thin paste. It can then be strained into the spray tank. SPRAYING EQUIPMENT i For plants growing under commercial conditions the ordinary high-pressure power outfits in general use for control of other insects
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Figure 5.—Spraying shade trees with high-power outfit. It is essential that the tops of certain varieties of trees he covered with a coating of spray to prevent injury by the beetle and diseases can be employed. (Fig. 5.) These outfits are made with pumps of from two to four cylinders having a capacity of from 10 to 50 gallons per minute and operated by gasoline engines of from 4 to 15 horsepower. Often the pumps are operated by a direct hook-up with the tractor or truck drawing the sprayer. Only the best grade of high-pressure hose which is guaranteed against im- perfections in workmanship and materials should be used and the working pressure under which the hose is to be used should be speci- fied. The length will depend on the conditions under which it is to be employed, although 50-foot lengths are handy when considerable

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