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Issue:ISSN 2095-1353
           CN 11-6020/Q
Director:Chinese Academy of Sciences
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Your Position :Home->Past Journals Catalog->2020年57 No.5

The relationship between the insect community and Exserohilum turcicum in corn fields
Author of the article:FENG Li-Chao;GENG Kai;ZHANG Shao-Qing;ZHOU Yan;ZHANG Yu-Feng;ZHANG Shuang;ZHAO Li-Na;CHEN Dian-Yuan
Author's Workplace:Department of Plant Protection, Jilin Agricultural Science and Technology University, Jilin 132101, China; 2. Testing and Analysis Center, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China
Key Words:Exserohilum turcicum; maize incidence; insect species richness; correlation
Abstract:
[Objectives]  To explore the relationship between the occurrence of northern corn leaf blight and insect community composition in farmland, and identify insect vectors of this pathogen. [Methods]  Field investigation, pathogen separation and purification, physiological identification and biochemistry and molecular biology, were used to identify insects carrying Exserohilum turcicum. [Results]  Sixty insect species, from forty-five families and nine orders (Diptera, Coleoptera, Lepidoptera, Hemiptera, Hymenoptera, Ephemeroptera, Neuroptera, Orthoptera and Dermaptera) were investigated during an outbreak of northern corn leaf blight (Exserohilum turcicum) in corn fields. The Diptera were the dominant order and the Coleoptera the second most abundant. Microscopy and DNA analysis revealed that the E. turcicum pathogen was present in insect species. We suspect that the two Coleoptera species (Notoxus monoceros and Monolepta hieroglyphica) carry more pathogen than the Diptera (P<0.05), however, the species richness of virus vectors was lower among the Coleoptera than among the Diptera. There was a correlation between insect species and the incidence E. turcicum in corn crops. [Conclusion]  Transmission of E. turcicum by insects may play a small role in outbreaks of this disease.
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