Welcome to Chinese Journal of Biological Control,Today is

Chinese Journal of Biological Control ›› 2022, Vol. 38 ›› Issue (1): 18-28.DOI: 10.16409/j.cnki.2095-039x.2021.09.020

• RESEARCH REPORTS • Previous Articles     Next Articles

Species Identification and Diversity Analysis of Pathogenic Fungi Infecting Overwintering Ostrinia furnacalis in Xinjiang Oasis

JIANG Xudong1,2, DING Xinhua3, WANG Xiaowu2, FU Kaiyun3, YUAN Zihan1, TOULXUN Ahemaiti3, HE Jiang3, JIA Zunzun1,3, GUO Wenchao2, WANG Zhifang2, YANG Xinping2, DAI Jinping2, XIE Yuqing2, ZHOU Liuyan2, FENG Lei2   

  1. 1. College of Agriculture, Xinjiang Agricultural University, Urumqi 830052, China;
    2. Institute of Microbiology Application, Xinjiang Academy of Agricultural Sciences/Xinjiang Key Laboratory of Microbiology for Special Environments, Urumqi 830091, China;
    3. Institute of Plant Protection, Xinjiang Academy of Agricultural Sciences/Northwest Desert, Ministry of Agriculture and Rural Affairs Key Laboratory of Integrated Management of Oasis Crop Pests, Urumqi 830091, China
  • Received:2021-06-10 Online:2022-02-08 Published:2022-03-01

Abstract: The diversity of pathogenic fungi resources of overwintering Ostrinia furnacalis in Xinjiang oasis was investigated from 2019 to 2020 at 185 sampling sites in 6 counties/cities from 5 prefectures in Xinjiang. A total of 136 entomopathogenic pathogens were isolated and identified from 534 collected specimens, which are from 7 orders, 7 families, 9 genus and 14 species. Among them, Aspergillus nomius (22.1%), Beauveria bassiana (19.9%), and Fusarium sp. (13.2%) were dominant species; Fusarium anthophilum (9.6%), Penicillium polonicum (2.9%), Penicillium raistrickii (1.5%), Lecanicillium attenuatum (6.6%), Fusarium equiseti (3.7%), Fusarium proliferatum (2.2%), Mortierella polycephala (5.9%), Alternaria alternata (5.2%), Acremonium strictum (2.9%) were common species; Fusarium solani (0.7%) was a rare species. The relative abundance index of the fungi was the most in District of Xinshi in Urumqi city (41.4%), followed by Changji City in Changji Prefecture (21.4%), Horgos City in Ili Prefecture (15.0%), and Shule County in Kashgar Prefecture (11.4%). The richness index ranked in order of Horgos City, Yili Prefecture (10)>Shule County, Kashgar Prefecture (6)>District of Xinshi in Urumqi City (5)>Changji City in Changji Prefecture (4). Both diversity and evenness index were high in Khorgos, whereas those of Changji City in Changji Prefecture and the District of Xinshi in Urumqi, Xinyuan County in Ili Prefecture and Changji Prefecture in Changji Prefecture, and Huoerguosi City in Yili Prefecture and Shule County in Kashgar Prefecture were similar. In the two years 2019 and 2020, the highest mortalities (28% and 14%, respectively) resulted from the fungi were recorded in Xinshi District in Urumqi. In 2019, the mortalities from dominant pathogenic fungi differed significantly among the locations; in 2020, the mortalities with Beauveria were significantly different among the locations, while those with Aspergillus and Fusarium did not differ significantly. These results are significant for developing microbial control agents with local pathogenic fungi for the sustainable control of O. furnacali in Xinjiang.

Key words: Xinjiang, corn planting area, entomopathogenic fungi, diversity

CLC Number: