ASSESSMENT OF ALLELOPATHIC EFFETS OF COGONGRASS (IMPERATA CYLINDRICA L.) ON WHEAT, ONION AND SOME ASSOCIATED WEEDS | ||
| Fayoum Journal of Agricultural Research and Development | ||
| Article 8, Volume 31, Issue 1, January 2017, Pages 108-119 PDF (1.52 M) | ||
| Document Type: Research articles. | ||
| DOI: 10.21608/fjard.2017.191233 | ||
| Authors | ||
| Ibrahim H. H. Ali; Ekram F. Hashim; Makram A. M. Sayed; Ibrahim A. A. Senosy | ||
| Plant Protection Dept., Faculty of Agric., Fayoum University, Egypt | ||
| Abstract | ||
| Studying the influence of cogongrass (Imperata cylindrica L.) extract on germination and seedling growth of some weeds and crops indicated that the dicotyledonous weeds such as goosefoot and sowthistle were the most affected by the aqueous extract of cogongrass (rhizome and foliage) than the monocotyledonous crops, wheat and onion, based on IC50 values. Delay in germination was more pronounced in weeds than crops. Dry weight of wheat and onion seedlings were not significantly affected meanwhile the dry weight of goosefoot, fieldbind and sowthistle seedlings were significant, by lower than control. Rhizome extract was generally more effective than foliage extract. Allelochemicals in cogongrass (rhizome and foliage) analyzed by liquid chromatography/mass spectrometry (LC/MS) were identified as phenolic compounds that included 3'-o-methyl-(-)-epicatechin-7-o-sulphate, vanillic, ferulic and coumaric acids in rhizome extract, in addition to (-)- epigallocatechin-3,5-digallate, caffeic and gallic in foliage extract. Chlorogenic acid was the principal phenolic compound in both extracts. These results suggest that cogongrass might have an inhibitory effect. Considering that cogongrass is an allelopathic plant might suggest its use as soil additive material for weed control and could also serve as natural herbicide. | ||
| Keywords | ||
| Allelopathy; Cogongrass extract; Germination; Seedling growth; Weeds; Crops; Allelochemicals | ||
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