The experiment was conducted at IGAU, Raipur. The pathogen
associated with collar rot of brinjal was identified as Sclerotium
rolfsii. Potato sucrose agar and potato dextrose agar were found
best for mycelial growth of the pathogen, whereas good sclerotial
production was obtained in Kings B and soybean leaf medium. The
optimum mycelial growth and production was recorded at the
temperature of 30 C and 25 C and pH 5.0 and 7.0 respectively.
Trichoderma viride found most effective in inhibiting both mycelial
growth and sclerotial production of S. rolfsii. Among the medicinal
plants leaf extracts Buch showed the best inhibitory effect. Under
mist chamber and natural field conditions, the soil and seedling
dip treatments with T. viride and summer ploughing found most
effective to reduced the % disease incidence of collar rot pathogen
and also increased the growth of brinjal. Similar treatment of
Pseudomonas fluorescens also minimize the disease and increase the
yield of brinjal. Among 67 genotypes screened, 3 genotypes were
observed to be resistant, 7 were moderately resistant and the
remaining varieties were susceptible."
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