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Herbicidal Activity of Stylosanthes guianensis and its Phytotoxic Components
Author(s) -
Khanh T. D.,
Hong N. H.,
Nhan D. Q.,
Kim S. L.,
Chung I. M.,
Xuan T. D.
Publication year - 2006
Publication title -
journal of agronomy and crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.095
H-Index - 74
eISSN - 1439-037X
pISSN - 0931-2250
DOI - 10.1111/j.1439-037x.2006.00232.x
Subject(s) - allelopathy , agronomy , weed , germination , legume , stylosanthes , bioassay , pasture , weed control , chemistry , lolium multiflorum , biology , genetics
Stylosanthes guianensis is a popular pasture legume and cover crop. The legume possessed strong allelopathic potential and suppressed spontaneous growth of paddy weeds. In a bioassay, aqueous extract of S. guianensis remarkably inhibited germination and growth of barnyardgrass and monochoria. Application of 1 ton ha −1 upland parts of S. guianensis significantly reduced paddy weed biomass by 80 % and increased rice yield by 40 % when compared with the control. Gas chromatography‐mass spectrometry analysis reveals the presence of several allelochemicals in S. guianensis including phenolic acids, coumarin and long‐chain fatty acids. Stylosanthes guianensis may be used as a source of natural herbicide for reducing the dependency on synthetic herbicides in agricultural production.