Status of spraying practices for the con trol of plant lice in apple orchards
Parrott, P.J., Hodgkiss, H.E.
Status of spraying practices for the con trol of plant lice in apple orchards - Geneva 1915 - 193-209 p. - Plant, Apple New York Agricultural Experiment Station. Bulletin No. 402 .
Status of spraying practices for the con trol of plant lice in apple orchards - Geneva 1915 - 193-209 p. - Plant, Apple New York Agricultural Experiment Station. Bulletin No. 402 .