| Show OIL SPRAYS COMBAT SCALES I ON VALUABLE SHADE TREES When the shade trees are dormant It is possible to take effective steps for the control of any scale insects that hive h been observed ed during the growing season The best methol of I combat is to spray with Ith oil emulsion or miscible oil sprays the I I I guts gUlt of the United States State Depart Depart- Department Department Department ment of Agriculture I Ithe j These sprays kill by contact with the insects rather than by poisoning their food and may be used at great- great greater I er cr strength and more effectively when the trees tree are leafless and dormant either in the tre fall or early spring S is SI they would be likely to injure the trees if lf used in the grO growing mg season I The entomologists say that proprietary tary preparations of these oil sprays can n be purchased and should be use usI us- us I e 1 ed cd according to directions Through spraying of all scaly areas is ii es- es essential essential es essential yet et care should hould be taken ken to see that the spray solution does not accumulate on tho the ground at the base of the trees where it might injure the roots |
