Blumberg, D., Ben-Dov, Y., Mendel, Z., Gross, S., & Dreishpon, Y. 1999 [Outbreaks and biological control of the citriculus mealybug Pseudococcus cryptus Hempel in Israel in the past and present revaluation [reevaluation?] and current situation.]. Alon Hanotea 53(4): 155-160.

Notes: P. cryptus was first discovered in Israel in 1937 and very rapidly became a serious pest of citrus. Since the early '40s the population has sharply decreased, probably as a result of the introduction of the parasitoid Clausenia purpurea. Newly developed citrus varieties are most susceptible to P. cryptus outbreaks.