Dose-response relations between Purpureocillium lilacinum PLSAU-1 and Meloidogyne incognita infecting brinjal plant on plant growth and nematode management: a greenhouse study

The efficacy of various doses of Purpureocillium lilacinum PLSAU-1 ( P. lilacinum PLSAU-1) was evaluated against brinjal root-knot pathogen, Meloidogyne incognita ( M. incognita ) at different inoculum levels. Experimental pot soil was treated by four doses (0, 1 ×  10 5 , 5 × 10 5 , and 1 × 10 6  C...

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Bibliographic Details
Published in:Egyptian journal of biological pest control 2019-04, Vol.29 (1), p.1-9, Article 26
Main Authors: Sarven, Most. Sinthia, Aminuzzaman, F. M., Huq, Md. Enamul
Format: Article
Language:English
Subjects:
Biological control
Biomedical and Life Sciences
Brinjal
Inoculum density
Life Sciences
Meloidogyne incognita
Purpureocillium lilacinum PLSAU-1
Zoology
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Summary:The efficacy of various doses of Purpureocillium lilacinum PLSAU-1 ( P. lilacinum PLSAU-1) was evaluated against brinjal root-knot pathogen, Meloidogyne incognita ( M. incognita ) at different inoculum levels. Experimental pot soil was treated by four doses (0, 1 ×  10 5 , 5 × 10 5 , and 1 × 10 6  CFU/g soil) of P. lilacinum PLSAU-1 before transplanting, and 5 inoculum levels of M. incognita (0, 100, 400, 800, 1600, and 3200 eggs per 100 cm 3 soil) were used after 3 days of brinjal transplantation. A significant correlation was observed between doses of P. lilacinum PLSAU-1 and inoculum densities of M. incognita . Among the doses, the rate of P. lilacinum PLSAU-1 of 1 × 10 6  CFU/g soil enhanced highly plant growth parameters. Inoculation of M. incognita reduced plant growth significantly, and the reduction increased with the increase of inoculum density of M. incognita . The application of P. lilacinum PLSAU-1 at 1 × 10 6  CFU/g soil reduced a maximum of 72% gall index and 84% egg masses when the crop was challenged by 800 and 400 eggs/100 cm 3 soil, respectively. The dose of 1 × 10 6  CFU/g soil of P. lilacinum PLSAU-1 showed effectiveness to reduce reproduction factor of M. incognita up to 81% when the crop was inoculated by 800 eggs of the pest/100 cm 3 soil. The study demonstrated that P. lilacinum PLSAU-1 is an effective bio-agent for controlling of root-knot nematode on brinjal and can be a key component of environment-friendly management approach.
ISSN:2536-9342
2536-9342
DOI:10.1186/s41938-019-0128-6