In-Vitro Evaluation of Fungicides, Biocontrol Agents and Plant Extracts Against Rice Sheath Blight Pathogen Rhizoctonia Solani.

Of the fourteen fungicides of different groups evaluated in-vitro against Rhizoctonia solani , Metalaxyl (0.1%), Mancozeb (0.1%), Tricyclazole (0.1%), Thiophenate methyl (0.1%), Carbendizm+ Mancozeb (0.1%) were proved to be most effective in inhibiting the growth of the fungus. Among the bio-agents screened, Trichoderma viride was most effective in restricting the growth of Rhizoctonia solani followed by Penicillium notatum where as Aspergillus niger was proved least effective. Among the thirteen plant extracts evaluated garlic extract (10%) was most effective in inhibiting the growth of fungus followed by calotropis (10%). Datura leaf extract (10%) was found to be least effective in inhibiting the growth of Rhizoctonia solani.

Evaluation of field inoculation techniques for screening maize (zea mays) genotypes against banded leaf and sheath blight (rhizoctonia solani ) disease.

A field experiment was conducted during kharif season 2008 and 2009 at the Regional Agricultural Research Station, lam farm, Acharya N G Ranga Agricultural University, Hyderabad to develop a suitable non damaging method for inoculating Rhizoctonia. solani which causes banded leaf and sheath blight disease in maize. Results revealed that inoculation with paddy straw method is superior to other methods as well as reported techniques and can be adopted on a large scale for evaluating maize germplasm against banded leaf and sheath blight disease.