Abstract
The Pseudomonas fluorescens (Pf1), Bacillus subtilis (Bs1) are the major potential biocontrol agents against foliar pathogens. MPf1 and MBs1 were found to be the most effective in inhibiting the mycelial growth of Alternaria helianthi. These biocontrol agents have the maximum capacity in controlling the spore germination, and data showing the growth-promoting effect of biocontrol agents and inhibition of seed-borne fungi are available. Seed-borne infections of A. helianthi are controlled by seed treatment with P. fluorescens, which showed least seed infection. The root length and shoot length has also been increased.
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