Mycobiology

The Korean Society of Mycology (한국균학회)
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Entomopathogenic Fungi as Dual Control Agents against Both the Pest Myzus persicae and Phytopathogen Botrytis cinerea

  • Yun, Hwi-Geon (Department of Agricultural Biology, College of Agriculture, Life & Environment Science, Chungbuk National University) ;
  • Kim, Dong-Jun (Department of Agricultural Biology, College of Agriculture, Life & Environment Science, Chungbuk National University) ;
  • Gwak, Won-Seok (Department of Agricultural Biology, College of Agriculture, Life & Environment Science, Chungbuk National University) ;
  • Shin, Tae-Young (Department of Agricultural Biology, College of Agriculture, Life & Environment Science, Chungbuk National University) ;
  • Woo, Soo-Dong (Department of Agricultural Biology, College of Agriculture, Life & Environment Science, Chungbuk National University)
  • Received : 2017.06.19
  • Accepted : 2017.09.25
  • Published : 2017.09.01
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Abstract

The green peach aphid (Myzus persicae), a plant pest, and gray mold disease, caused by Botrytis cinerea, affect vegetables and fruit crops all over the world. To control this aphid and mold, farmers typically rely on the use of chemical insecticides or fungicides. However, intensive use of these chemicals over many years has led to the development of resistance. To overcome this problem, there is a need to develop alternative control methods to suppress populations of this plant pest and pathogen. Recently, potential roles have been demonstrated for entomopathogenic fungi in endophytism, phytopathogen antagonism, plant growth promotion, and rhizosphere colonization. Here, the antifungal activities of selected fungi with high virulence against green peach aphids were tested to explore their potential for the dual control of B. cinerea and M. persicae. Antifungal activities against B. cinerea were evaluated by dual culture assays using both aerial conidia and cultural filtrates of entomopathogenic fungi. Two fungal isolates, Beauveria bassiana SD15 and Metarhizium anisopliae SD3, were identified as having both virulence against aphids and antifungal activity. The virulence of these isolates against aphids was further tested using cultural filtrates, blastospores, and aerial conidia. The most virulence was observed in the simultaneous treatment with blastospores and cultural filtrate. These results suggest that the two fungal isolates selected in this study could be used effectively for the dual control of green peach aphids and gray mold for crop protection.

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References

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