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journal1 ›› 2019, Vol. 35 ›› Issue (3): 390-398.DOI: 10.16409/j.cnki.2095-039x.2019.03.013

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Distribution and Occurrence of Isaria tenuipes in Different Habitats of Xishuangbanna Nature Reserve

ZHENG Yaqiang1, CHEN Bin1, ZHAO Yongxin1, XU Tianmei1, SU Zaotang1, ZHANG Lingying1, PHANGTHAVONG Souksamone1, LOINHEUANG Chanhom1, LI Yifei1, XIAO Guanli2   

  1. 1. College of Plant Protection, Yunnan Agricultural University/State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Kunming 650201, China;
    2. College of Agriculture & Biology Technology, Yunnan Agricultural University, Kunming 650201, China
  • Received:2018-12-11 Online:2019-06-08 Published:2019-06-17

Abstract: Distribution and seasonal variation of Isaria tenuipes in five different habitats in tropical rainforests of Xishuangbanna Nature Reserve were investigated from July 2017 to September 2018 for the purpose of resource utilization and development of pests biocontrol agents. The five habitat types included karst monsoon forest, tropical monsoon forest, monsoon evergreen broad-leaved forest, tropical clustered bamboo forest, and warm temperate coniferous forest. Identification by morphology and molecular sequence showed a total 1061 specimens of I. tenuipes, mainly distributed in low and middle altitude habitats of the karst monsoon forest, where 272 and 267 specimens were collected, accounting for relative abundance of 25.64% and 25.16%, respectively. Second in the specimen colletion was from the monsoon evergreen broad-leaved forest and high altitude karst monsoon forest, where 179 and 150 specimens originated, covering relative abundance of 16.87% and 14.14%, respectively. The specimen numbers of I. tenuipes collected from the tropical monsoon forest and tropical clustered bamboo forest were fewer than those from the monsoon evergreen broad-leaved forest and high altitude karst monsoon forest, where 96 and 94 specimens were collected, with relative abundance of 9.05% and 8.86%, respectively. From the warm temperate coniferous forest, the fewest specimens were collected, with relative abundance of only 0.28%. I. tenuipes occurred principally in the periods from October to January in fog-cool season and March to May in dry-hot season. These results provide a theoretical basis for ecological diversity and resource utilization of I. tenuipes in rainforests ecosystem.

Key words: Isaria tenuipes, Xishuangbanna Nature Reserve, entomopathogenic fungi, distribution, occurrence, seasonal variation

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