Pierce, W.C. 1938 Control of the obscure scale on pecan with low concentrations of lubricating oil emulsions.. Journal of Economic Entomology 31(6): 722-724.
Notes: Trials of chemical pesticides against Chrysomphalus obscurus.
Pierce, W.C. 1938 Control of the obscure scale on pecan with low concentrations of lubricating oil emulsions.. Journal of Economic Entomology 31(6): 722-724.
Notes: Trials of chemical pesticides against Chrysomphalus obscurus.