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Allelopathic Effect of Lantana (Lantana camara) and Siam Weed (Chromolaena odorata) on Selected Crops

Published online by Cambridge University Press:  12 June 2017

Ismail B. Sahid  and
John B. Sugau
Ismail B. Sahid
Affiliation:
Bot. Dep., Univ. Kebangsaan Malaysia, 43600 UKM, Bangi, Selangor, Malaysia
John B. Sugau
Affiliation:
Bot. Dep., Univ. Kebangsaan Malaysia, 43600 UKM, Bangi, Selangor, Malaysia
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Abstract

Laboratory, greenhouse, and field studies were conducted to determine the allelopathic potential of lantana and Siam weed on the germination and growth of five crops. Emergence and dry weight of bioassay species were affected when lantana or Siam weed debris was present on the soil surface or incorporated into the soil. However, presence of Siam weed on the soil surface did not affect dry weight of rape. Emergence and dry weight of crops (except emergence of spinach) were not affected when crops were grown in soil samples collected from beneath field-grown lantana. Dry weight of Chinese cabbage and chilli was reduced when these crops were grown in Siam weed-contaminated soil. Germination of Chinese cabbage, chilli, and rape decreased progressively when exposed to increasing concentrations of aqueous lantana extract. However, the lantana extract at full strength (66.7 g L−1) did not reduce germination of spinach and cucumber seed. Siam weed extract, when applied at full strength to seed of spinach, Chinese cabbage, rape, and chilli, reduced germination by 10, 12, 21, and 19% of control, respectively. Full-strength extract of lantana and Siam weed decreased seedling length and fresh weight of all crops.

Keywords

Lantana, Lantana camara L. # LANCASiam weed, Chromolaena odorata (L.) R. M. Kingchilli, Capsicum frutescens L.Chinese cabbage, Brassica chinensis L.cucumber, Cucumis sativus L.rape, Brassica juncea (L.) Czern & Coss # BRSJUspinach, Amaranthus viridis L.Allelopathygerminationweed leaf debris
Type
Soil, Air, and Water
Information
Weed Science , Volume 41 , Issue 2 , June 1993 , pp. 303 - 308
Copyright
Copyright © 1993 by the Weed Science Society of America 

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