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cje ›› 2005, Vol. ›› Issue (10): 1115-1119.

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Population dynamics of Tetranychus truncatus in corn fields

PANG Baoping1, LIU Jiaxiang2, LIU Maorong3, GAO Shujing1   

  1. 1. College of Agriculture, Inner Mongolia Agricultural University, Huhhot 010019, China;
    2. Inner Mongolia Plant Protection Station, Huhhot 010010, China;
    3. Erduos Plant Protection Station, Dongsheng 017000, China
  • Received:2004-10-16 Revised:2004-12-20 Online:2005-10-10

Abstract: The population dynamics of Tetranychus truncatus in corn fields were investigated in Hangjinghouqi,Bayanzhuoer League,Inner Mongolia from 1999 to 2001.The results showed that the spatial patterns of the mites were aggregated,and the aggregation intensity decreased with increasing population density.With optimal sorting method,the natural population dynamics of T.truncatus were divided into five stages,(i.e,)(1)the population began to colonize with low quantity on a few plants in June and early July,(2)increased slowly with low density and high aggregation intensity in mid-July,(3)rose quickly and distributed in whole corn fields with high density and declining aggregation intensity from the end of July to mid-August,(4)reached the highest with the lowest aggregation intensity in the end of August,and(5) declined quickly in September.

Key words: Stipa baicalansis, Tiller, Module structure, Clonal growth

CLC Number: