Show OYSTER SHELL BARK LOUSE insect found on over forty different food plants in united states an effective spray by crongia 11 LIST colorado experiment station As tho the name will indicate this la if one ol of the scale insects taking its name from the scale covering that la is secreted over the insects body re aern bling somewhat the convex side ul ui 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 shade trees it has proved especially bad in somo some sections of this state on lilac iliac and ash if one of these scales be raised in the wint winter elir or early spring there will be found beneath it a mass of very small email yellowish or whitish eggs that hatch about the middle of may alay into small lico lice that appear as more mere spec specks its to tho the naked eye they move about tor for a few days then insert their beaks into the bark and begin to feed by the end of the season they are fully developed and have secreted a scaly covering ov over the entire body in the fall the abdull adult deposits the mass of small eggs and dies spraying with kerosene emulsion 5 6 per cent kerosene in may or june just after hatching time has baa proved very effective in controlling this post pest |