O'Dell, J.H. 1931 Terminal plant quarantine inspection: 1929.. Annual report (Arizona Commission of Agriculture and Horticulture) 21st & 22nd: 32-34.

Notes: Red scale, purple scale, black scale, greedy scale, rose scale, soft brown scale, aspidistra scale, cottony cushion scale, ivy scale, obscure scale, marlatt scale and mealybugs listed.