Ziegler, L.W., & Wolfe, H.S. 1975 . Citrus Growing in Florida. The University Presses of Florida Gainesville 246 pp.

Notes: Scales and mealybugs are discussed in a chapter on the citrus spray program. Among the species discussed are the purple scale, Florida red scale, citrus snow scale, glover scale, yellow scale, chaff scale and the citrus mealybug.