DeBach, P., & Bartlett, B.R. 1951 Effects of insecticides on biological control of insect pests of citrus.. Journal of Economic Entomology 44(3): 372-383.

Notes: Species discussed include cottony cushion scale, citrus scale, purple scale, Florida red scale, yellow scale, citrus mealybugs, soft brown scale, California red scale, black scale and long-tailed mealybug.