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Research Article | Open Access

Biocontrol efficacy of atoxigenic Aspergillus flavus strains against aflatoxin contamination in peanut field in Guangdong province, South China

Firew Tafesse Mamoa,b,c( ), Bo Shanga,b, Jonathan Nimal Selvarajd, Yongquan Zhenge, Yang Liua,b( )
School of Food Science and Engineering, Foshan University/South China Food Safety Research Center, Foshan, Guangdong, P R. China
Key Laboratory of Agro-products Quality and Safety Control in Storage and Transport Process, Ministry of Agriculture and Rural Affairs, Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
Ethiopian Biotechnology Institute, Addis Ababa, Ethiopia
The College of Life Sciences, Hubei University, Wuhan, P. R. China
State Key Laboratory for Biology Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
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Abstract

Application of atoxigenic strains of Aspergillus flavusto soils is the most successful aflatoxin biological control approach. The objective of this study was to evaluate the efficacies of native non-aflatoxin producing (atoxigenic) strains as a biocontrol agent in peanut field in China. The competitive atoxigenic A. flavus strains (JS4, SI1and SXN) isolated from different crops, in China were used for field evaluation. The strains applied during the growing season (June – October, 2016) in the field at rate of 25 kg inoculum/hectare. The colonization of these biocontrol agents has been investigated and the population of A. flavus communities in soil were determined. The incidences of toxin producing (toxigenic) A. flavus strains and aflatoxin contamination in peanuts were also determined. Treated plots produced significant reductions in the incidence of toxigenic isolates of A. flavus in soil. However, the total fungal densities were not significantly different (p > 0.05) after treatments. Large percentage of aflatoxin reductions, ranging from 82.8% (SXN) up to 87.2% (JS4) were recorded in treated plots. Generally, the results suggest that the strategy can be used to control aflatoxin contamination and continuous evaluation should be done.

Keywords

peanutbiocontrolAtoxigenic Aspergillus flavusstrainstoxigenic Aspergillus flavusstrainsaflatoxins

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Mycology
Volume 13 Issue 2,
June 2022
Pages 143-152
DOI: 10.1080/21501203.2021.1978573
Cite this article:
Mamo FT, Shang B, Selvaraj JN, et al. Biocontrol efficacy of atoxigenic Aspergillus flavus strains against aflatoxin contamination in peanut field in Guangdong province, South China. Mycology, 2022, 13(2): 143-152. https://doi.org/10.1080/21501203.2021.1978573

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Received: 15 June 2021
Accepted: 04 September 2021
Published: 06 October 2021
© 2021 The Author(s).

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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