1Sigsgaard L, Esbjerg P,Philipsen H. Experimental releases of Anthocoris nemoralis F. and Anthocoris nemo- rum (L.) (Heteroptera : Anthocoridae) against the pear psyl lid Cacopsylla pyri L. (Homoptera: Psyllidae) in pear[J]. Biological Control, 2006,39 (1) : 87-95.
2Daugherty M P,Briggs C J ,Welter S C. Bottom-up and top- down control of pear psylla(Cacopsylla pyricola):Fertili- zation, plant quality, and the efficacy of the predator Antho- coris nemoralis [J ]. Biological Control, 2007, 43 (3): 257-264.
3Park J D, Hong K H. Species,damage and population densi- ty of Pseudococcidae injuring pear fruits[J]. Korean Journal of Applied Entomology, 1992,31(2) : 133-138.
4Yong J H,Soon K D,Rae C M,et al. Recent status of major fruit tree pest occurrences in Korea[J]. Journal of the Kore- an Society for Horticultural Science, 2000,41 (6) : 607-612.
5Pellizzari G, Duso C, Rainato A, et al. Phenology, ethology and distribution ofPseudococcus comstocki, an invasive pest in northeastern Italy [J]. Bulletin of Insectology, 2012, 65(2) :209-215.
6Meyerdirk D E, Newell I M. Seasonal development and flight activity of Pseudococcus cornstockl in California[J]. Annals of the Entomological Society of America, 1979,72: 492-494.
7Romanchenko A A, Belskaya N M. The Comstock mealy bug in the Odessa region[J]. Zashchita Rastenii, 1981,4: 1-41.
8Hough W S. Biology and control of Comstoek's mealy bug on the umbrella eatalpa[J].Virginia Agricultural Experi- ment Station Technical Bulletin, 1925,29 : 1-27.
9Woodside A M. Comstock's mealy bug as an apple pest[J]. Journal of Economic Entomology, 1936, 29 ( 3 ) : 544-546.
10Agnello A M, Spangler S M, Eissig W H, etal. Seasonal development and management strategies for Comstock mealy bug(Homoptera:Pseudococeidae)in New York pear orchards[J]. Journal of Economic Entomology, 1992,85: 212-225.