Meloidogyne javanica control by Pochonia chlamydosporia, Gracilibacillus dipsosauri and soil conditioner in tomato

Summa Phytopathologica

Guilherme Silva De Podestá²  Leandro Grassi De Freitas²  Rosangela Dallemole-giaretta¹  Ronaldo João Falcão Zooca²  Larissa De Brito Caixeta¹  Silamar Ferraz² 

[1] ,Universidade Federal de Viçosa Departamento de FitopatologiaViçosa MG ,Brasil

关键词: Root-knot nematode;    organic matter;    rhizobacteria;    alternative control;    Nematoide das galhas;    matéria orgânica;    rizobactéria;    controle alternativo;   

DOI  :  10.1590/S0100-54052013000200007

来源: SciELO

【 摘 要 】

Organic matter plays a fundamental role in the antagonistic activity of microorganisms against phytonematode populations on the soil. In this study, the compatibility between the fungus Pochonia chlamydosporia (Pc-12) and the rhizobacterium Gracilibacillus dipsosauri (MIC 14) was evaluated in vitro, as well as the effect of the fungus at the concentration of 5,000 chlamydospores per gram of soil, rhizobacterium at 4.65 x 10(9) cells/g of soil, and the soil conditioner Ribumin® at 10 g/pot, either alone or in combination, against Meloidogyne javanica population in tomato plants (3,000 eggs/pot). A suspension of water or Ribumin® alone was applied on the soil as negative control, while a suspension of nematode eggs was applied as positive control. The reduction in the number of galls in roots per plant was 48 and 41% for the treatments Ribumin + MIC 14 + Pc-12 and MIC 14 + Pc-12, respectively. Regarding to the number of eggs per plant, MIC 14 and Pc-12 + Ribumin led to a reduction by 26 and 21%, respectively, compared to the control treatment. Interaction between the nematophagous fungus and the rhizobacterium was positive for the nematode control, even though G. dipsosauri inhibited P. chlamydosporia growth by up to 30% in in vitro tests.

【 授权许可】

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