EFFECT OF ALLELOPATHIC LEAF EXTRACT OF SOME SELECTED WEED FLORA OF AJMER DISTRICT ON SEED GERMINATION OF TRITICUM AESTIVUM L.

The present study was conducted to investigate the allelopathic effects of some selected weeds (Phalaris minor L., Chenopodium muraleL., Sonchus oleraceus L., Cyanodon dactylon L. and Convolvulus arvensis L.) of Ajmer district on seed germination and seedling growth of wheat(Triticum aestivum L.). Root, stem and leaf aqueous extracts of weeds at 2, 4, 6, 8, 10% concentrations were applied to determine their effect on seed germination, seedling length and seedling dry weight of test plant under laboratory conditions. The aqueous extracts of all the weeds under study caused inhibitory effects on seed germination; seedling length and seedling dry weight of crop, which increased progressively on increasing the concentration of weed plant part extracts. The leaf extract of Phalaris minor have more inhibitory effect on the germination percentage of crop as compared to other weeds under study. The inhibition caused by the leaf extract of Phalaris minor was found to be more than stem and root extracts of all the weeds under study.