. The control of citrus insects. Citrus; Scale insects. Dosage.—The dosage is based upon the distance around and over the tented tree. The simplest way of calculating this dosage, and one which seems to answer the purpose in practical work, for average sized trees, is to multiply the distance around by the distance over the tented tree, point off two places in the product, and then reduce this by one-fourth. This will correspond to the full schedule, as given on page 34, excepting that in the case of the very small trees the dosage is increased, and in the case of very large trees, decreased f
. The control of citrus insects. Citrus; Scale insects. Dosage.—The dosage is based upon the distance around and over the tented tree. The simplest way of calculating this dosage, and one which seems to answer the purpose in practical work, for average sized trees, is to multiply the distance around by the distance over the tented tree, point off two places in the product, and then reduce this by one-fourth. This will correspond to the full schedule, as given on page 34, excepting that in the case of the very small trees the dosage is increased, and in the case of very large trees, decreased from that of the above calculation. The amounts of acid and water used are according to the formula given. If a tree requires 12 ounces of sodium cyanide, then 12 plus. Fig. 3.—A commissary cart pulled by a horse; a common type in use in Southern California. one-fourth, or 15 fluid ounces of acid, and twice 12, or 24 fluid ounces, of water will be needed. In practice, however, it is not necessary to make this calculation, for vessels are provided which are properly graduated for this formula. With these vessels, if a tree requires 12 ounces of cyanide, the acid pitcher is filled to the 12 mark with acid, and the water pitcher to the 12 mark with water. Leakage and Care of Tents.—Even with the very best tents kept in the best condition, there is a large leakage of gas, but when the tents become badly worn and have numerous holes on account of tears and acid burns, the escape of gas is so great as to seriously impair the results. The tents are required to be inspected daily, and where. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Quayle, H. J. (Henry Josef), 1876-. Berkeley, Calif. : University of California, College of Agriculture, Agricultural Experiment Station
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherberke, bookyear1915
