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Dynamics of Aphis gossypii and its predatory natural enemies in organic agricultural cotton filed

WU Wenyue1,2; LV Zhaozhi2,3;WANG Dengyuan1; ZHANG Jianxin3;YAN Shaozhou1   

  1. 1College of Agronomy, Xinjiang Agricultural University, Urumqi 830052, China;

    2Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China;

    3Xinjiang Academy of Agriculture and Reclamation, Shihezi 832000, China

  • Received:2006-01-21 Revised:2006-06-16 Online:2006-10-10 Published:2006-10-10

Abstract: In this paper, the numbers of Aphis gossypii and its predatory insects in organic agricultural and conventional cotton fields were estimated in June-August 2005. The results showed that there was a significant difference in the dynamics of A. gossypii and its predator populations between organic agricultural and conventional cotton fields. In organic agricultural cotton field, the individuals of the aphid, adult and larval ladybird, adult and larval lacewing, hoverfly,and spider were 3.17, 2.22, 2.70, 0.33, 2.00, 1.89, and 2.47 times higher than those in conventional cotton field, respectively. It was suggested that in the production of organic agricultural cotton, spraying plant source pesticides could be helpful to suppress A. gossypii in organic agricultural cotton fields.

Key words: Oligotrophic bacteria, Ecological characteristics, Environmental science