Controlling the Fruit Tree Leaf-Roller (Archips Argyrospila) With Oil Emulsions

Abstract

Several oil sprays were tested in the laboratory during the early spring of 1930 to determine their efficiency as ovicides in leaf-roller control. Dendrol 8%, Kleenup 8%. Diamond Paraffin oil, emulsified with Kayso, using 6% of actual oil, Sunoco spray oil 8%, and Scalecide 8% were tested. All of these were applied during the late dormant period. save Scalecide, which was applied during the delayed dormant period. All of these sprays gave satisfactory control except Scalecide. Orchard tests following the laboratory tests. in which Dendrol 8%, Kleenup 8%, Diamond Paraffin 6%, and Scalecide 8% were tested, gave practically the same results as the laboratory tests.