Comparative efficiency of dust and spray mixtures in controlling the current aphis
Parrott, P.J., Harman, S.W.
Comparative efficiency of dust and spray mixtures in controlling the current aphis - Geneva 1924 - 1-1-21 p. - New York Agricultural Experiment Station. Bulletin No. 517 .
Comparative efficiency of dust and spray mixtures in controlling the current aphis - Geneva 1924 - 1-1-21 p. - New York Agricultural Experiment Station. Bulletin No. 517 .