. Cirtus fruits under irragation. Citrus fruits; Fruit-culture. Fig. 20 Flonda red scale. The Hght-colored area around the Florida red scale m Fig. 21 illustrates the work of the pink fungus on this scale. Its method of application is the same as for the red- headed scale fungus. The insect enemies are about the same as those of the purple scale. In view of the fact that it is attacked by only a ew parasites, spraying must be largely resorted to. The miscible oils are the best insecticides but they do not kill either the eggs or the older scales efficiently. To do thorough § 28 CITRUS FRUITS I
. Cirtus fruits under irragation. Citrus fruits; Fruit-culture. Fig. 20 Flonda red scale. The Hght-colored area around the Florida red scale m Fig. 21 illustrates the work of the pink fungus on this scale. Its method of application is the same as for the red- headed scale fungus. The insect enemies are about the same as those of the purple scale. In view of the fact that it is attacked by only a ew parasites, spraying must be largely resorted to. The miscible oils are the best insecticides but they do not kill either the eggs or the older scales efficiently. To do thorough § 28 CITRUS FRUITS IN GULF-COAST STATES 27 work it is necessary to follow the first spraying with a second in 3 or 4 weeks. In addition to the citrus plants, the other food plants of the Florida red scale are the camphor, the banana, the magnolia, the oleander, the palms, and the myrtle. 25. California Ked Scale.—A scale that has several times obtained a foothold in Florida but has never become a severe pest in the East is the California red scale. It derives Its name from the reddish color of the mature scale. It is thin- ner and less conspicuous than the Florida red scale. The life history and control is the same as for other Fig. 21 26. Cliaff Scale.—The chaff scale is preeminently a scale of the smaller branches, although it is found on the trunk, the larger branches, the leaves, and the fruit. The scales fre- quently overiap, and, being of a yellowish-gray color and thin in texture, they resemble a collection of chaff. They may cover the branches thickly, but they are apt to be overiooked, because their color is so similar to that of the bark. This scale derives its name from the appearance of the colonics of females, which are the color of chaff. The female scale is about ^ inch m length and neariy as wide. The first larval skin is at the apex and the female is darker in color than the male. It is the smaller male scale, however, that is more apt to reveal its. Please note that
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