Journal of Pure and Applied MicrobiologyVol. 4 No. 2

Biocontrol of Stem Rot of Ground Nut Incited by Sclerotium rolfsii and in vitro Compatibility of Potential Native Antagonists with Fungicides

L. Vijaya Sai*, P. Anuradha, K. Vijayalakshmi and N.P. Eswar Reddy

Department of Applied Microbiology, Sri Padmavathi Women’s University, Tirupati - 517 502 , India.

Received on 14 January 2010 and accepted on 18 February 2010

 

ABSTRACT

Groundnut is an important oil seed crop of tropics and sub-tropical regions of the world. Among the fungal diseases, Stem rot of groundnut caused by Sclerotium rolfsii is potentially very destructive disease. A detailed study on isolation of pathogen, rhizosphere mycoflora, antagonism of rhizosphere against S.rolfsii and integrated management of the disease with biocontrol agent. Eight different mycoflora were Aspergillus flavus, Rhizopus sp., Pencillium, A.niger and Trichoderma isolates (TG1, TG2, TG3, TG4) isolated consistently from the rhizosphere of groundnut. Among them TG2 isolate was found to be significantly superior over others in inhibiting the mycelial growth of S.rolfsii to the extent of 67.83%.

Keywords : Trichoderma, Sclerotium rolfsii, Ground nut, Rhizosphere mycoflora.