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Show Common Scale Insects Affecting Apple Trees There are three common scales which affect trees the San Jose scale, the oyster-shell scale and the scurfy-scale. scurfy-scale. The San Jose Is probably the most common and most destructive. This scale is about the size of a pin-head. pin-head. They form sort of a crust on the branches. Trees badly covered with these crusts should be sprayed late during the fall, and then again early in the spring. The oyster-shell scale Is so called because It resembles an oyster shell, and these also form crusts on the branches. The scurfy scale gives the bark a peculiar scurfy appearance, and both of these as well as the San Jose should be sprayed with a strong lime-sulphur solution when the trees are dormant. About the only effective way to kill the round-headed borer Is to dig it out with knife or a wire. There Is another an-other protection that should be give! orchards during early December Field mice and rabbits are liable to play havoc with young trees during the winter when feed is sct-.rce. The best protection is made by wrapping the lower portion of the trunk of the trees with building paper, tying it securely. Or, dirt piled up around the trees 10 or 12 Inches high will do much towards keeping mice away. These protections should be provided before heavy snow comes. |