Smith, R.H. 1944 Bionomics and control of the nigra scale, Saissetia nigra.. Hilgardia 16: 225-288.
Notes: A thorough study of the coccid in California; description, hosts, distribution, damage, enemies, control.
Smith, R.H. 1944 Bionomics and control of the nigra scale, Saissetia nigra.. Hilgardia 16: 225-288.
Notes: A thorough study of the coccid in California; description, hosts, distribution, damage, enemies, control.