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Articles by R.O. Sanni
Total Records ( 2 ) for R.O. Sanni
  O.J. Ilori , O.O. Otusanya , A.A. Adelusi and R.O. Sanni
  Helianthus annus, Chromolaena odorata and Tithonia diversifolia are weeds in the family Asteraceae. The present study was aimed to investigate the phytotoxic activities of these weeds on the seed germination and seedling growth of Vigna unguiculata. The seeds of the test crop were sown in petri dishes lined with filter paper moistened with the different aqueous extract prepared from the weeds while control received distilled water. The results showed that the germination and seedling growth of Vigna unguiculata were inhibited by the application of fresh leaf extract of Chromoleana odorata. All the different extracts inhibited the root length of the test plant. It was suggested that these weeds be controlled in the field where they grow in association with cultivated crops.
  O.J. Ilori , O.O. Ilori , R.O. Sanni and T.A. Adenegan-Alakinde
  Chromolaena odorata (a weed in the family Asteraceae) has been shown to enhance the buildup of organic matter in fallow system in tropical soil. Therefore, the aim of this study was to investigate the effects of Chromolaena odorata on the growth of Celosia argentea. The shoots of C. odorata were extracted in distilled water after soaking for 12 h. The filtrate obtained served as treatment for the seedling in the aqueous extract regime (FSE). Results showed that the shoot height, leaf area, fresh and dry weight were enhanced by the application of aqueous extract prepared from the fresh shoot of Chromolaena odorata. The root length of the test plant in the aqueous extract regime was longer at the initial period of the experiment but was later lower than those of the control. Therefore, Chromolaena odorata might not be playing an inhibitory role on the growth and development of Celosia argentea. It was suggested that the weed should be soil incorporated to serve as green manure.
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