研究报告

Occurrence and Population Dynamics of Chironomid Midges in Early Rice Field

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  • 1Institute of Entomology, Guizhou University/The Provincial Key Laboratory for Agricultural Pest Management of Mountainous Region, Guiyang 550025, China; 2China National Rice Research Institute, Hangzhou 310006, China; *Corresponding author, E-mail: yanghucnrri@gmail.com

Received date: 1900-01-01

  Revised date: 1900-01-01

  Online published: 2010-11-10

Abstract

The chironomid midge is one of world wide distribution insects and normally occurs in a great abundance among many kinds of water bodies. In rice field, chironomid midges are very abundant. Currently, our knowledge about chironomid midges in rice field is limited to the species survey as a neutral group. By using specially designed emergence traps, the occurrence of chironomid midges in rice field were studied throughout the early rice season in Fuyang, Zhejiang Province, China. Four species of chironomid, namely, Tanytarsus formosanus, Chironomus sinicus, Polypedilum nubifer and Tanypus punctipennis, were collected from rice fields. All of them are widely distributed species. T. formosanus and C. sinicus were the most dominant species in rice field. The dynamic of chironomid midges in early rice field could be divided into two phases, namely early and late phases. The abundance of chironomid midges was higher in the early phase than that in the late phase. It was estimated that there were 45 million chironomid midges emerged from the 1 hectare rice field throughout the early rice season. It was also found that the sex ratio of T. formosanus was female biased during the early phase, whereas it was male biased during the late phase. In contrast, the sex ratio of C. sinicus was male biased throughout the field season.

Cite this article

LI Zhi-yu,YANG Hong,LAI Feng-xiang,FU Qiang,HU Yang . Occurrence and Population Dynamics of Chironomid Midges in Early Rice Field[J]. Chinese Journal OF Rice Science, 2010 , 24(6) : 630 -634 . DOI: 10.3969/j.issn.1001-7216.2010.06.011

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