Weed Biology and Management (2002) 2, 143-147

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Nguyen Huu Hong, Tran Dang Xuan, Tsuzuki Eiji, Mitsuhiro Matsuo and Ogushi Yuichi (2002)
Evaluation of the allelopathic potential of Kava (Piper methysticum L.) for weed control in rice
Weed Biology and Management 2 (3), 143-147
Abstract: Kava is a perennial pepper plant from the Oceanic region, which is commonly used as a drink by natives and for pharmacological purposes. Results of this study concluded that Kava has allelopathic potential and suppressed germination and growth of lettuce (Lactuca sativa L), barnyardgrass (E. crus-galli Beauv var. formosensis Ohwi.), and duck-tongue weed (M. vaginalis Presl var. plantaginea Solms-Laub.) Moreover, Kava inhibited emergence of weeds in paddy soils. The inhibition of Kava became stronger as the applied concentration increased. In a greenhouse experiment, Kava had the greatest inhibition on emergence and weed growth in paddy soils when a dose of 1tonha-1 of Kava was divided and applied at 3, 16, and 23 days after watering. Inhibition by Kava varied among weed species. Results from this study suggest that Kava might be useful for weed control in rice or reduce dependence on herbicide.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Tran Dang Xuan

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host
control - general

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Echinochloa crus-galli (weed) Rice (Oryza)
Echinochloa crus-galli (weed) Kava (Macropiper methysticum)
Monochoria vaginalis (weed) Rice (Oryza)