ISSN 2630-0583 (Print)

ISSN 2630-0656 (Online)

JCST

Journal of Current Science and Technology

http://jcst.rsu.ac.th

Rangsit Journal of Arts and Sciences. Vol.6 No.1 , January - June 2016.

Allelopathic potential of Citrus reticulata peel extract for weed control

Duangporn Suwanagul, Weerasak Pitaksaringkarn, and Anawat Suwanagul

Abstract

          The potential use of tangerine orange (Citrus reticulata) peel extract for controlling barnyard grass (Echinochloa crus-galli) was investigated. Crude extracts of dried powdered peel with 70% methanol before and after chlorophyll removal were compared.  The crude extract without chlorophyll showed greater inhibition efficiency of seed germination than the extract containing chlorophyll.  Moreover, the extract of chlorophyll-lacking fraction was shown to contain ABA, a known growth inhibitor in various plant species.  This fraction also showed higher concentration of ABA than before chlorophyll removal which greatly correlated to the weeds germination inhibition test.  This work suggested the ability of the crude extract of Citrus reticulata’s peel to control weed growth could be enhanced by chlorophyll removal.

Keywords: Citrus reticulata, Echinochloa crus-galli, peel extract, weed control, allelopathy

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DOI: 10.14456/rjas.2016.2