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Chinese Journal of Applied Ecology ›› 1999, Vol. 10 ›› Issue (2): 245-250.

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Effect of plant diversity in agroecosystems on insect pest populations

Hou Maolin, Sheng Chengfa   

  1. Institute of Zoology, Academia Sinica, Beijing 100080
  • Received:1997-01-28 Revised:1997-09-10 Online:1999-03-25 Published:1999-03-25

Abstract: In this paper, the ecological mechanism about the effect of plant diversity on insect pest development and its population dynamics was analyzed. Natural enemy hypothesis and food source concentration hypothesis, the two main prevailing hypotheses concerning this ecological mechanism, were reviewed, and the advantages and disadvantages of plant diversity for insect pest control were summarized. Empirical data show that increased plant diversity in agroecosystems may, at many cases, reduce the populations of certain insect pests, but at present, it is difficult to draw a general conclusion about the effect of plant diversity on populations for all types of insect pests in different habitats.

Key words: Agroecosystem, Plant diversity, Insect pest control, Natural enemy hypothesis, Food source concentration hypothesis, hydrological process, significance level, environmental change., hydrological variability, jump