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Information Journal Paper

Title

ALLELOPATHIC EFFECT OF RUE (RUTA GRAVEOLENS L.) ON SEED GERMINATION OF THREE WEEDS

Pages

 Start Page 463 | End Page 471

Abstract

 The allelopathic effects of rue (Ruta graveolens L.) were evaluated on seed GERMINATION of velvet flower (Amaranthus retroflexus), flixweed (Descurainia Sophia) and purslane (Portulaca oleracea) in laboratory using the AQUEOUS EXTRACTs of dried powdered of rue leaves. The treatments were 0.5, 1, 2.5, 5, 10 and 15% extract of RUTA GRAVEOLENS and distilled water (control). According to the results, extracts significantly inhibited seed GERMINATION of weed species and the degree of inhibition increased with increasing concentration of extracts. GERMINATION of Amaranthus retroflexus seeds was inhibited at concentrations greater than 5%. In addition, radicle and plumule lengths of Amaranthus retroflexus were significantly reduced at 1% compared to the distilled water. Results indicated GERMINATION percentage, GERMINATION rate and radicle and plumule lengths of Portulaca oleracea were significantly reduced by the extracts compared to the distilled water. Results confirm GERMINATION of Descurainia Sophia seeds was inhibited at concentrations greater than 2.5%. Accordingly GERMINATION rate and radicle lengths of Descurainia sophia were significantly reduced by the extracts compared to the distilled water. Therefore, extract of rue might be useful as natural herbicides and might also contain numerous growth inhibitors that could be used for the development of biological herbicides.

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