Evaluation of organic inputs against Ralstonia solanacearum – A bacterial wilt pathogen of capsicum under protected cultivation

Seven organic inputs viz; biosol, matka khad, fermented buttermilk, panchgavya, biodynamic compost tea, cow urine and vermiwash were evaluated in vitro against Ralstonia solanacearum causing bacterial wilt of capsicum. Tetrazolium chloride medium (TZC) was amended with both sterilized and unsterilized organic inputs at different concentrations (0.5–4.0%). Unsterilized biodynamic compost tea showed 91.30% inhibition at 2.0% and 95.60% inhibition at 4.0% concentration in the bacterial growth whereas biosol (unsterilized) was also found effective in inhibiting bacterium with 92.30%. Combination of biosol, cow urine, fermented butter milk, biodynamic compost tea, vermiwash and homa ash enhanced the survivability of seedlings upto 13.65 days at 1:10 ratio after 1 hr dip duration when seedlings were tested in hoagland's solution. All organic inputs were evaluated under polyhouse conditions against bacterial wilt of capsicum. Drench with mixture of biosol, fermented butter milk, cow urine, vermiwash and homa ash before and after transplanting along with seedling dip in biosol for 10 min. Before transplanting provided 86.64, 85.22 and 84.64% disease control at rajol, Palampur and Sungal areas, respectively.