. The American fruit culturist, containing directions for the propagation and culture of all fruits adapted to the United States. Fruit-culture. 166 DESTRUCTIVE INSECTS. latter part of May. They travel about over the bark for a few hours, and when a suitable place is found to insert their beak, they begin feeding, and never move from the spot during the rest of their life. They soon begin to secrete the scaly cover- ing, which gradually increases in size with the growth of the tender body of the insect underneath. When fully grown early in the fall, the female deposits her quota of eggs under
. The American fruit culturist, containing directions for the propagation and culture of all fruits adapted to the United States. Fruit-culture. 166 DESTRUCTIVE INSECTS. latter part of May. They travel about over the bark for a few hours, and when a suitable place is found to insert their beak, they begin feeding, and never move from the spot during the rest of their life. They soon begin to secrete the scaly cover- ing, which gradually increases in size with the growth of the tender body of the insect underneath. When fully grown early in the fall, the female deposits her quota of eggs under the scale and dies. The male insect is provided with wings, and is developed under a much smaller scale (Fig. 222, d). The old scales muy remain on the bark for a year or more, and oftentimes the living scales may be so numerous as nearly to cover the bark, as shown in c in Fig. 223. Young trees are often much weakened from its attacks, but it rarely kills apple-trees. One should scrape off all of the scales practi- cable when the tree is dormant, thus removing the eggs, which are dif- ficult to reach and kill with any wash. Then wait until about May 15 th, or as soon as the young lice can be seen crawling on the bark, and drench the bark with kerosene emulsion, or a whale-oil soap solution of one pound in five gallons of water, or use a kerosene-water pump with ten per cent, of kerosene. A second application may be necessary a week or ten days later. The Scurfy Bark-louse {Chionasfis furfurus') is another scale very commonly met with in orchards, especially on apple and pear-trees. As shown in Fig. 224, it is shaped somewhat like the oyster-shell bark-louse, and has a similar life-history, but. Fig. 221. Figs. 222 and 223. The Oyster-shell Bark-louse. Fig. 221.—Female scale from below, showing eggs. Fig. 222.—The same from above, greatly enlarged ; d^ male scale, enlarged. Fig. 223.—Female scales, (U. S. Div. of En- tomology.). Please note that these images are extracted
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