Smith, R.H. 1940 Winter mortality of the black scale (Saissetia oleae Bern.) on oranges in California.. Journal of Economic Entomology 33: 534-535.
Notes: Seasonal history and control of black scale and mortality studies are discussed.
Smith, R.H. 1940 Winter mortality of the black scale (Saissetia oleae Bern.) on oranges in California.. Journal of Economic Entomology 33: 534-535.
Notes: Seasonal history and control of black scale and mortality studies are discussed.