ANTIFUNGAL ACTIVITY OF CERTAIN MEDICINAL PLANT EXTRACTS AGAINST PURPLE BLOTCH AND STEMPHYLIUM BLIGHT OF ONION

R.K. MISHRA, K.J. SRIVASTAVA, R.P. GUPTA

Abstract


Onion (Allium cepa L.) is one of the most important vegetables grown and used as spice and salad all over the country. Purple blotch (Alternaria porri (Wallr) Simmons.) and Stemphylium blight (StemphyliulIl vesicariulIl (Ellis)cif) are serious diseases in India affecting the production and quality of onion. Thepesticides of plant origin in comparison to synthetic compounds are more desirable as they have little or no side effects (Kumar et aI., 1995).Green plants appear to be reservoir of biotoxicants and constitute an exhaustive source of innocuous pesticides (Swaminathan, 1978).The natural compounds provide less phytotoxic,more systemic and easily biodegradable fungitoxic compounds (Fawcett and Spencer, 1970; Tripathi and Dixit, 1977 and Saxena et aI., 2005). Present study was undertaken to evaluate ten medicinal plants for their antifungal activity against A.porrii and S. vesicariulIl, causal agents of purple blotch and stemphylium blight of onion,respectively. Experiments were carried out under in vitro conditions at National Horticultural Research and Development Foundation, Regional Research Station, Kamal, Haryana.


Keywords


plant extract; purple bloch

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