OCR Text |
Show OYSTER-SHELL BARK LOUSE Insect Found on Over Forty Different Food Plants in United States An Effective Spray. (By GKORGR M. LIST, Colorado Experiment Experi-ment Station.) As the name will indicate, this Is one of the scale insects, taking its narrs from the scale covering that Is secreted over the insect's body, resembling re-sembling somewhat the con, ex side of an oyster shell. This insect has been reported on over forty different food plants in the United States, including most of our fruit trees, also many ornamental and Bhado trees. It i;as proved especially bad in some sections of this state on lilac and ash. If one of these scales be raised in the winter or early spring, there will be found beneath it a mass of very small yellowish or whitish eggs that tiatch about the middle of May Into small lice that appear as mere specks Lo tb - naked eye. They move about for a few days, ;hen Insert their beaks into the bark and begin to feed. By the end of tho season they are fully developed and have secreted a scaly covering over the entire body. In the fall, the adult deposits the mass of small eggs and dies. Spraying with kerosene emi'lsiou 5 per cent kerosene in May or June just after hatching time has proved very effective in controlling this pesL |