Economic entomology for the farmer Economic entomology for the . economicentomolo00smit_0 Year: 1896 THE INSECT WORLD. Ill numerous enough to require treatment. It usually attracts atten- tion in spring, when white cottony masses become numerous on twigs or leaves, increasing in size until they are one-fourth of an inch or more in length, and only Fig. 83. slightly less in diam- eter, though irregu- lar in outline. The mass seems cottony, but is actually a wax or gum, for, if a bit is taken with a for- ceps it can be drawn out into strings of considerable length. When of this size it
Economic entomology for the farmer Economic entomology for the . economicentomolo00smit_0 Year: 1896 THE INSECT WORLD. Ill numerous enough to require treatment. It usually attracts atten- tion in spring, when white cottony masses become numerous on twigs or leaves, increasing in size until they are one-fourth of an inch or more in length, and only Fig. 83. slightly less in diam- eter, though irregu- lar in outline. The mass seems cottony, but is actually a wax or gum, for, if a bit is taken with a for- ceps it can be drawn out into strings of considerable length. When of this size it forms a bedding for innumerable, rusty- brown, minute eggs, which have been laid by the female insect under the brown scale which seems to form the head of the mass at- tached to the twig. From these eggs minute, crawling larvae hatch, much like the eggs in color, and which separate in every direction in what seems to be a moving mass of fine dust particles. In a day or two each lar^'a inserts its beak into a leaf or twig, and commences the for- mation of a little, flattened, oval, somewhat mottled scale. They remain thus, feeding and increasing in size, and as they increase the scales enlarge. The males come to maturity in the latter part of the summer, appearing as minute, two-winged flies, furnished with long anal filaments. They mate with the females which re- main under the scale, and these, before the leaves fall, migrate to the twigs or branches, where they fasten themselves to pass the winter. Feeding is resumed in spring, when the sap begins to circulate, and then the egg masses begin to form. Before the Cottony maple scale, Pulvinaria innumerabilis, showing, at a, the female on a leaf and, at b, same on a twig.
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Photo credit: © Bookend / Alamy / Afripics
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