PJB-2017-681
CARICA PAPAYA: A SOURCE OF WEED MANAGEMENT IN CROPS
TAUSEEF ANWAR
Abstract
Current study was conducted to investigate the allelopathic effect of Carica papaya L. aqueous extract and leaf dry powder on seeds and pre-germinated seeds of Avena fatua L., Rumex dentatus L., Helianthus annuus L., Triticum aestivum L. and Zea mays L. on filter paper and soil in Weed Management Program Laboratory, Department of Plant and Environmental Protection at PARC Institute of Advanced Studies in Agriculture, National Agriculture Research Centre, Islamabad, Pakistan. Germination percentage, radical length and plumule length (cm) were parameters observed for Plant Sandwich Method and Aqueous Extract Method bioassays. Most of the growth inhibition was found in the seedlings of A. fatua by filter paper method. Its radical growth was greatly reduced in aqueous (80%) and dry powdered form (89%). On the other hand, plumule growth was also reduced, up to some extent, under the influence of aqueous extract (57-73%) and powdered material (59-77%). The inhibitory effects on other test species were in the sequence of H. annuus, followed by Z. mays and R. dentatus. The aqueous extract showed non-significant effect on wheat seed germination, radical and plumule growth. It is suggested that C. papaya aqueous extract can be used as source of weed management in wheat crop.
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