Allelopathic suppression of Avena fatua L. and Rumex dentatus L., in associated crops with plant leaf powders.
The study was conducted to investigate the allelopathic effect of leaf powder of Rumex dentatus L., Euphorbia helioscopia L., Parthenium hysterophorus L. and Carica papaya L. on seed and seedling of Avena fatua L., R. dentatus, Helianthus annuus L., (K.S.E 7777), Triticum aestivum L., (Wafaq 2001) and Zea mays L., (Islamabad Gold 2010) on filter paper and soil in laboratory. Germination, radical and plumule length of T. aestivum was significantly suppressed by R. dentatus and P. hysterophorus leaf powder while remaining unaffected by E. helioscopia and C. Papaya leaf powder when compared to control. E. helioscopia and P. hysterophorus leaf powder decreased the germination and subsequent growth of A. fatua and R. dentatus. There was no effect on growth of Z. mays and H. annuus when E. helioscopia leaf powder was applied on seedling. R. dentatus exhibited auto-toxicity.