Leonard, M.D. 1932a The cottony-cushion scale in Puerto Rico.. Journal of Economic Entomology 25(5): 1103-1107.
Notes: The discovery and spread of Icerya purchasi is discussed, as well as chemical and biological control.
Leonard, M.D. 1932a The cottony-cushion scale in Puerto Rico.. Journal of Economic Entomology 25(5): 1103-1107.
Notes: The discovery and spread of Icerya purchasi is discussed, as well as chemical and biological control.