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KMID : 0525720140190020093
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Journal of Chitin and Chitosan
2014 Volume.19 No. 2 p.93 ~ p.99
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Suppression of Cucumber Root-Knot Nematode Meloidogyne incognita by Chitinolytic Fungi Lecanicillium psalliotae A-1 and Lecanicillium antillanum B-3
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Nguyen Van-Nam
Ju Wan-Taek
Kim Young-Ju
Jung Woo-Jin
Kim Kil-Yong
Park Ro-Dong
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Abstract
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Two chitinolytic and egg-parasitic fungi Lecanicillium psalliotaeA-1 and Lecanicillium antillanum B-3 were isolated and identified for biocontrol of M. incognita in cucumber field. They were cultivated, and mycelial biomass has been formulated and treated to the soil to evaluate their nematicidal activity on suppressing root-knot nematode M. incognita on cucumber plants in greenhouse. The chitinolytic fungi reduced cucumber root galls by 71.8, 60.3, and 47.4% in B-3, A-1+B-3, and A-1 treatment, respectively. In addition, nematode population in cucumber root was also reduced by 79.8, 62.0, and 37.9% in B-3, A-1+B-3, and A-1 treatments after 7 weeks of cucumber growth. Moreover, B-3 treatment improved significantly cucumber growth. The results demonstrate that the fungi B-3 and A-1 showed effectiveness of biological control of M. incognita on cucumber in pot experiment. These results demonstrate that the isolated fungi L. antillanum B-3 and L. psalliotae A-1 hold a high potential in egg parasitism and could be biological control agent against M. incognita in cucumber field.
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KEYWORD
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Lecanicillium psalliotaeA-1, Lecanicillium antillanum B-3, Meloidogyne incognita Nematicidal activity, Cucumber, Chitinolytic fungi, Biocontrol
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