. Injurious insects and the use of insecticides [microform] : a new descriptive manual on noxious insects, with methods for their repression . hould be gathered upand fed to hogs or destroyed. Since the adult beetle bores into the 72 INJURIOUS INSECTS. young apple, both for the purpose of feeding and depositing its eggs,the use of arsenites should be resorted to whenever this pest appears inconsiderable numbers. Spray with poisons, as directed for the Cod-ling-moth. (Page 58.) THE OYSTER-SHELL BARK LOUSE. {Mylilaspis pomorum.) This is one of the most troublesome and destructive insects withwhi
. Injurious insects and the use of insecticides [microform] : a new descriptive manual on noxious insects, with methods for their repression . hould be gathered upand fed to hogs or destroyed. Since the adult beetle bores into the 72 INJURIOUS INSECTS. young apple, both for the purpose of feeding and depositing its eggs,the use of arsenites should be resorted to whenever this pest appears inconsiderable numbers. Spray with poisons, as directed for the Cod-ling-moth. (Page 58.) THE OYSTER-SHELL BARK LOUSE. {Mylilaspis pomorum.) This is one of the most troublesome and destructive insects withwhich the orchardist has to deal. Its ravages are not confined to theapple-tree alone ; it infests the pear and plum, and aLso the currant. The female is only capable of locomotion for about three days, afterwhich she becomes immovably fastened to the tree. The eggs, whichare yellowish or whitish, hatch in May, and the young lice, scarcelyvisible to the naked eye, crawl over the bark for -two or three days,then, fixing their beaks into the bark far enough to reach the sap,remain fastened to the tree for life. They continue to feed upon the. Fig. 56,—Oyster-shell Bark Louse. sap of the tree, and by the end of the season have reached maturityand secreted the scaly covering under which their eggs for the firetspring brood have been deposited. Remedies.—The young lice are easily destroyed in spring byspraying with kerosene emulsion. The emulsion should be well made, with no free oil floating on thesurface, and to be effective must be very thoroughly applied. In oldorchards the trees should be scraped in winter or early spring and thenscrubbed with carbolic acid and soap solution. (See page 47.) THE WOOLLY APHIS. (Schizoneura lanigera.) Two forms of this insect are known, one attacking the trunks andlimbs and the other infesting the roots of trees. The white, flufly-masses on the limbs, which serve as a covering for the small, yellowishlice concealed beneath, are secreted by the in
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