Isolation, Identification, and Evaluation of the Predatory Activity of Chinese Arthrobotrys Species towards Economically Important Plant-Parasitic Nematodes

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Abstract
The current investigation aimed to isolate and identify predatory fungal strains and evaluate their efficacy in mitigating the effects of plant-parasitic nematodes. We successfully isolated three distinct nematophagous fungal strains from soil samples, identified as Arthrobotrys megalosporus, A. oligospora, and A. sinensis, using conventional and molecular identification methodologies. In vitro trials illustrated the high capture efficiency of these fungi against plant-parasitic nematodes. Over an exposure period of 48 h to Aphelenchoides besseyi, Bursaphelenchus xylophilus, and Ditylenchus destructor, A. megalosporus (GUCC220044) displayed predation rates of 99.7%, 83.0%, and 21.1%, respectively. A. oligospora (GUCC220045) demonstrated predation rates of 97.3%, 97.3%, and 54.6%, and A. sinensis (GUCC220046) showed rates of 85.1%, 68.3%, and 19.0% against the same cohort of nematodes. The experimental outcomes substantiate that all three identified fungal strains demonstrate predatory activity against the tested nematodes, albeit with varying efficiencies.
Funding Information
  • Guizhou Highland Specialty Vegetable Green Production Science and Technology Innovation Talent Team (Qiankehe Platform Talent-CXTD [2022]003, 2023520000240176, 202101, 2009003)
  • Science and Technology Major Special Project of Guizhou Tobacco Company (Qiankehe Platform Talent-CXTD [2022]003, 2023520000240176, 202101, 2009003)
  • Guizhou Provincial Education Department (Qiankehe Platform Talent-CXTD [2022]003, 2023520000240176, 202101, 2009003)
  • Guizhou Modern Agriculture Research System (GZMARS)—plateau characteristic vegetable industry (Qiankehe Platform Talent-CXTD [2022]003, 2023520000240176, 202101, 2009003)

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