Plant lice injurious to apple orchards
Hartzell, F.Z., Strickland, L.F.
Plant lice injurious to apple orchards III. delayed dormant spray for the control of rosy and green apple aphids - Geneva 1921 - 1-41 p. - Aphids, Apple, Orchards, Plant New York Agricultural Experiment Station. Bulletin No. 487 .
Plant lice injurious to apple orchards III. delayed dormant spray for the control of rosy and green apple aphids - Geneva 1921 - 1-41 p. - Aphids, Apple, Orchards, Plant New York Agricultural Experiment Station. Bulletin No. 487 .