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Chinese Journal Of Biological Control ›› 2020, Vol. 36 ›› Issue (3): 371-380.DOI: 10.16409/j.cnki.2095-039x.2020.03.006

• RESEARCH REPORTS • Previous Articles     Next Articles

Spatiotemporal Dynamics and Host Diversity of Isaria fumosorosea in Xishuangbanna Tropical Rain Forests

ZHENG Yaqiang1,3, WANG Wenqian1, CHEN Bin1, PHANGTHAVONG Souksamone1, ZHAO Yongxin1, XU Tianmei1, 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;
    3. College of Pharmacy, Guiyang University of Chinese Medicine, Guiyang 550025, China
  • Received:2019-10-23 Online:2020-06-08 Published:2020-06-12

Abstract: The spatiotemporal dynamics and host diversity of Isaria fumosorosea was investigated in five vegetation types of karst monsoon forest, tropical monsoon forest, monsoon evergreen broad-leaved forest, tropical clustered bamboo forest, and warm temperate coniferous forest in tropical rainforest of Xishuangbanna Nature Reserve for the purpose of further development and utilization of I. fumosorosea. A total of 674 strains of I. fumosorosea was collected from the five vegetations. The strains were mainly distributed in the tropical clustered bamboo forest and low, high and middle altitude of the karst monsoon forest, where 150, 133, 118 and 104 strains were collected, sharing relative abundances of 22.3%, 19.7%, 17.5% and 15.4%, respectively. Relatively fewer strains were found in the monsoon evergreen broad-leaved forest and the tropical monsoon forest, 77 and 73 strains and with, the relative abundance of 11.4% and 10.8%, respectively. The least number (19) of I. fumosorosea strains were found in the warm temperate coniferous forest, with a relative abundance of 2.8%. The number of I. fumosorosea strains did not differ significantly between different altitude areas of the karst monsoon forest. I. fumosorosea occurrence peaked from October to April. There were 12 orders of arthropods infected by I. fumosorosea, among which the dominant hosts were lepidoptera and hymenoptera, with a relative abundance of 40.4% and 36.4%, respectively. These results highlight the biodiversity of I. fumosorosea and provide strains of I. fumosorosea for screening for high virulent biocontrol strains.

Key words: Xishuangbanna tropical rain forests, Isaria fumosorosea, habitat distribution, seasonal variation

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