Insects injurious to fruits . for suction. They appear as small specks, scarcely visible totlie unaided eye; at first they are quite active, but, havingselected a location, soon fix themselves permanently to onespot. In a short time they secrete over their bodies fine 398 INSECTS INJURIOUS TO THE ORANGE. threads of wax, which are cottony in appearance. Soon asmall, white, convex scale takes the place of this cottonycoating, which is depressed in the centre. (See d, Fig. 407.)The scales gradually increase in size, and as they approachmaturity there is secreted on the female scale a mass ofcotto
Insects injurious to fruits . for suction. They appear as small specks, scarcely visible totlie unaided eye; at first they are quite active, but, havingselected a location, soon fix themselves permanently to onespot. In a short time they secrete over their bodies fine 398 INSECTS INJURIOUS TO THE ORANGE. threads of wax, which are cottony in appearance. Soon asmall, white, convex scale takes the place of this cottonycoating, which is depressed in the centre. (See d, Fig. 407.)The scales gradually increase in size, and as they approachmaturity there is secreted on the female scale a mass ofcottony threads, which increases in quantity until it some- Fio. times extends in a curved form, as shown at /, to a lengthfive times the diameter of the scale. In the figure all theillustrations are highly magnified, except the leaves with thescales on them, which are of the natural size. The male is furnished with a single pair of large, trans-parent wings, which enable it to fly readily. It is sh wn,highly magnified, in Fig. 408. No. 254.—The White Scale. Aspidiotus nerii Bouch6. This scale is found on the orange and lemon trees, par-ticularly in Southern California and in Florida, where it alsoinfests a number of other trees and plants, but especially theacacia-tree. In Fig. 409 a twig of acacia is figured infestedwith this scale. The female scale is flat, whitish or lightgray in color, and when mature is only about one-twelfth ofan inch in diameter. The eggs are of a light-yellow scale of the female is shown at c in the figure; the male INSECTS INJURIOUS TO THE ORANGE. 399 scale at b, both magnified ; the latter is slightly elongat
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Keywords: ., bookcentury1900, bookdecade1900, bookidin, booksubjectinsectpests
