ABSTRACT
The survival of sclerotia stored under different conditions revealed that when they were kept in laboratory survived fully up to 7 months. However in soil at 5 cm and 10 cm depth, it survived 100 percent up to 8 and 10 months. The pathogen was viable in the sclerotial form for 17 months in the lab conditions however; it survived for 19 months and 20 months when kept at 5 cm and 10 cm depth in soil respectively. The survival of pathogen along with plant debris stored under different conditions revealed that it survived fully up to 3 months under lab conditions. However in soil at 5 cm and 10 cm depth, it survived 100 percent up to 5 and 6 months respectively. The pathogen survived in diseased plant debris for 9 months in lab conditions. However, the pathogen survives in plant debris up to 11 months and 13 months when kept at 5 cm and 10 cm depth of soil respectively. The viability of pathogen in plant debris was lost gradually. This states sclerotia and plant debris served as source of primary inoculum. Out of fourteen plant species belonging to three families tested, the pathogen produced disease symptoms on all the tested plants and stating pathogen has wide host range.
ABSTRACT
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.