Abstract:

【Objective】 This paper was aimed to discuss the effects of intercropping aromatic plants on the dynamic response of arthropod community diversity in pear orchard. 【Method】 By indagating species and quantity of arthropod of 5 experimental treatments, including intercropping Ocimum basilicum plot, Tagetes patula L. plot, Saturela hortensis L. plot were selected as experimental treatments, natural grass plot and clean tillage plot were selected as control, the dynamic response of arthropod community diversity in the different intercropping plots were analyzed systematically. 【Result】 The results showed that under the conditions of intercropping aromatic plants in pear orchard, the changing trend of numbers of species and species richness of arthropod community of the 5 experimental treatments was rapidly ascending to relatively stable to slowly declining, the trend of diversity index of arthropod community was rapidly ascending to declining to ascending to relatively stable to slowly declining, the trend of evenness index was slowly declining to rapidly declining to rapidly ascending to relatively stable to slowly ascending, the trend of dominance index was slowly ascending to rapidly declining to rapidly ascending to relatively stable to slowly ascending. The changing trends of the 5 experimental treatments were different in the phenophase of pear trees, especially at young fruit stage and fruit expanding stage of pear trees. Dynamic response of the diversity indexes of arthropod of pest sub-community and natural enemy sub-community were different at various developmental stages of pear trees, and the change of the diversity index of arthropod of natural enemy sub-community followed obviously the change of the pest sub-community. Compared with the control, intercropping aromatic plants significantly inhibited the number of pests and increased the number of nature enemy of the three treatment plots at young fruit stage and fruit expanding stage of pear trees. 【Conclusion】 Therefore, there were obvious effects on community composition and diversity dynamic response of arthropod community, pest sub-community and natural enemy sub-community by intercropping the 3 aromatic plants Ocimum basilicum L., Tagetes patula L., Saturela hortensis L.

Key words: pear orchard, aromatic plants, arthropod community, dynamic response