Volatile organic compounds of Bacillus pumilus strain S1-10 exhibit fumigant activity against Meloidogyne incognita

Root-knot nematodes (RKNs) are highly specialized parasites that cause significant yield losses worldwide. In this study, we isolated Bacillus pumilus strain S1-10 from the rhizosphere soil of Zingiber officinale Rosc. plants and evaluated its fumigant activity against Meloidogyne incognita. S1-10 e...

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Published inPlant disease
Main Authors Dai, Mingming, Liu, Rui, Jiang, Hao, Zhang, Xiaoping, Song, Wenwen, Zhang, Jie, Liang, Chen, Zhao, Hong-Hai, Shi, Qianqian
Format Journal Article
LanguageEnglish
Published United States 01.10.2023
Subjects
Nematodes
Causal Agent
Vegetables
Disease management
Crop Type
Subject Areas
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Summary:Root-knot nematodes (RKNs) are highly specialized parasites that cause significant yield losses worldwide. In this study, we isolated Bacillus pumilus strain S1-10 from the rhizosphere soil of Zingiber officinale Rosc. plants and evaluated its fumigant activity against Meloidogyne incognita. S1-10 exhibited a strong repellent effect on second-stage juveniles (J2s) of M. incognita, and in vitro assays indicated that S1-10 VOCs suppressed J2 activity and egg hatching. Under greenhouse conditions, 71% and 79% reductions of nematodes and eggs were detected on plants treated with S-10 volatile organic compounds (VOCs) compared with controls. Ten VOCs were identified through gas chromatography and mass spectrometry (GC-MS), of which 2-(methylamino)-ethanol (2-ME) had strong fumigant activity against J2s of M. incognita, with a LC50 value of 1.5 mM at 12 h. These results indicate that S1-10 represents a potential novel biocontrol agent for RKNs.
ISSN:0191-2917
DOI:10.1094/PDIS-10-22-2391-RE