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Evaluation of the allelopathic potential of Kava ( Piper methysticum L.) for weed control in rice
Author(s) -
HONG NGUYEN HUU,
XUAN TRAN DANG,
EIJI TSUZUKI,
MATSUO MITSUHIRO,
YUICHI OGUSHI
Publication year - 2002
Publication title -
weed biology and management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 36
eISSN - 1445-6664
pISSN - 1444-6162
DOI - 10.1046/j.1445-6664.2002.00062.x
Subject(s) - kava , allelopathy , weed , biology , lactuca , weed control , germination , agronomy , perennial plant , pharmacology
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 1 ton ha −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.