Flower-visiting habitus of three common syrphids in farmland of Hanzhong area in early spring | 姹涓╂ュ颁腑3绉甯歌椋璁胯变х绌
2011
Zheng Shiling, Shaanxi University of Technology, Hanzhong (China), School of Biological Sciences and Engineering | Chen Liping, Shaanxi University of Technology, Hanzhong (China), School of Biological Sciences and Engineering | Zhang Hongjie, Shaanxi University of Technology, Hanzhong (China), School of Biological Sciences and Engineering
[Objective] The paper was to study the flower-visiting habitus of three common syrphids in farmland of Hanzhong area in early spring. [Method] The active flower-visiting syrphids in farmland of hanzhong area in early spring was investigated, the annual activity rhythm, flower-visiting behavior, characteristics of mouthparts and their flower-visiting adaptability of three common syrphids were studied. [Result] About 20 species of active flower-visiting syrphids were found in farmland of hanzhong area in early spring, Eristalis tenax (Linnaeus, 1758), Episyrphus balteatus (De Geer,1776) and Eristalis cerealis Fabricius, 1805 were predominant species in farmland. These three species could be found in farmland of Hanzhong area almost throughout the year, and they mainly activated on the flowers of rape and composites on the ridge of field in early spring. The activities of these flower-visiting syrphids were important to pollination of rape. The syrphid mouthparts had no structural characters in adaptation to flower-visiting, but the mouthparts were shorter, which was adaptive to visit the flowers with open and shallower corolla. [Conclusion] The results provided theoretical basis for further study on flower-visiting habitus and pollination effect of syrphids.
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