Abstract: Aim】 In order to provide theoretical basis for forecast and scientific control of Apolygus lucorum (Meyer-Dür), we surveyed the population dynamics of A. lucorum and its natural enemies in the pear orchards. 【Methods】 The population dynamics of A. lucorum and its natural enemies were studied by green sticky traps and visual investigation from 2012 to 2013 in a pear orchard of Institute of Forestry and Pomology, Beijing Academy of Agriculture and Forestry Sciences. 【Results】 The green sticky traps results showed that A. lucorum had two occurrence peaks, and the first peak was much higher than the second. The main peaks of A. lucorum appeared in late May to middle of June. However, the visual investigation indicated that A. lucorum had two occurrence peaks in mid May and late May in 2012, but had only one occurrence peak in late May in 2013. The peak of natural enemies mainly happened in early June to late June in 2012 and 2013. The main natural enemies were predators, including spiders and insects. The natural enemy insects included 7 species belonging to 3 families of 3 orders. The dominant predators were spiders, Chrysoperla sinica (Tjeder), Harmonia axyridis (Pallas) and Propylea japonica (Thunberg). 【Conclusion】 There are obvious pursuing relationships in time and quantity between green plant bugs and their natural enemies.

Key words: Apolygus lucorum, pear orchard, natural enemy, population dynamics, dominant species, green sticky trap