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Kava root powder for the control of the economically important nematode, Meloidogyne incognita

journal contribution
posted on 24.10.2021, 23:49 authored by Ranjeeta D Singh, Joel JohnsonJoel Johnson, Janice ManiJanice Mani, Khurma R Uma, Mani NaikerMani Naiker
The root knot nematode (Meloidogyne incognita) infests numerous commercial crops, causing significant amounts of economic damage. Here, the anti-nematodal potential of commercial powdered root material from kava (Piper methysticum) powder was tested on this species. Pot trials using tomato seedlings were conducted at kava powder concentrations of 1,2 and 5% w/w. The powder was allowed to degrade in the soil for between 0 and 6 weeks before planting and inoculation with juvenile (J2) M. incognita inoculum. Plant health and nematode infestation levels were quantified after 52 days (7.5 weeks). At all concentrations tested, kava powder was found to suppress infection by M. incognita in a dose-respondent fashion, with higher concentrations providing superior nematode control, albeit showing a concomitant reduction in plant health. Concentrations of 1 or 2% kava combined with a degradation time of two weeks prior to planting and inoculation produced the best combination of nematode control while maintaining plant health. There was a significant difference in the inhibition levels produced by Fijian and Vanuatuan kava, likely due to differences in their chemical composition. When used as a soil additive, kava root powder appears to have considerable potential for controlling root knot nematodes.

History

Volume

50

Issue

1

Start Page

7

End Page

12

Number of Pages

6

eISSN

0974-4444

ISSN

0303-6960

Publisher

Indian Agricultural Research Institute

Peer Reviewed

Yes

Open Access

No

Acceptance Date

26/06/2020

External Author Affiliations

University of the South Pacific, Fiji; Danone Nutricia, New Zealand

Era Eligible

Yes

Journal

Indian Journal of Nematology