Title: Population biology of the cottony-cushion scale, Icerya purchasi Maskell (Homoptera
Subtitle: Coccidae) and its natural enemies in southern California
Description: It is actually a scientific monograph based on the senior author's PhD dissertation, and published in HILGARDIA, a scientific journal, University of California Ag. Publications, Berkeley. Vol 41, No. 20, April 1973. Co-author: Professor Paul DeBach
Subjects: Cottony cushion scale
Places: Southern California