. Cirtus fruits under irragation. Citrus fruits; Fruit-culture. 4D to /"* T rr^-r^ t -r f^ <^iiJS.uC5 i^KUllb UliJliK IKKIGATIUN §24 44. The mealy bug is a soft-bodied insect and is attacked by several parasitic and predacious enemies, which, although they reduce its ravages considerably, do not keep the pest in control. This pest is one of the most difficult to kill in large numbers either by fumigation or by spraying. It seems resistant to the ordinary dosages of hydrocyanic-acid gas used in fimiigation, and, on account of being hidden in protected places on the fruit and of having
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. Cirtus fruits under irragation. Citrus fruits; Fruit-culture. 4D to /"* T rr^-r^ t -r f~^ <^iiJS.uC5 i^KUllb UliJliK IKKIGATIUN §24 44. The mealy bug is a soft-bodied insect and is attacked by several parasitic and predacious enemies, which, although they reduce its ravages considerably, do not keep the pest in control. This pest is one of the most difficult to kill in large numbers either by fumigation or by spraying. It seems resistant to the ordinary dosages of hydrocyanic-acid gas used in fimiigation, and, on account of being hidden in protected places on the fruit and of having the habit of collecting in masses on the fruit, the insects are not easily reached by spraying. Although. Fig. 25 fumigation kills many of the insects, this is not recommended unless some other pest such as black scale, purple scale, or red scale is present. The most satisfactory control measure is spraying with carbolic-acid emulsion, which is made up of 1 gal- lon of crude carbolic acid, 8 pounds of whale-oil soap, and 170 gallons of water. The soap and carbolic acid are dissolved in hot water, and an emulsion is made by stirring the mixture into the water. In spraying for this pest, it should be remem- bered that pressure is the main requisite so that the bugs may be washed from their lodging places, and that the spray may reach all parts of the tree. A pressure of about 175 pounds should be maintained in the pump and a nozzle that will give § 24 CITRUS FRUITS UNDER IRRIGATION 49 a rather coarse driving spray should be used. If the insects are present in large numbers three or four applications a week or so apart may be necessary to control them.. 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 work.. Scranton : International Textbook Co.