Cranshaw, W.S., Jevremovic, Z, Sclar, D.C., & Mannix, L. 2000 Observations on the biology and control of the hawthorn (two-circuli) mealybug, Phenacoccus dearnessi (King).. Journal of Arboriculture 26(4): 225-229.

Notes: P. dearnessi is a serious woody plant pest of Crataegus pp. in Colorado. Studies were conducted to understand its biology and to evaluate management strategies.