Abstract:
Bacterial wilt of brinjal and other solanaceous vegetables caused by
Ralstonia solanacearum is the most destructive disease. The bacterial wilt disease is wide spread, affecting many solanaceous vegetable crops in India, especially in Karnataka and continue to pose serious problem to farmers. The
In vitro studies carried out to find the effectiveness of antibiotics and antagonists in inhibiting the growth of
R. solanacearum. The antibiotics
viz., Amoxycilin, Cefixime, Ciprofloxacin, Tetracyclin, Norfloxacin and Streptomycin were highly effective at 500 – 750 ppm with the maximum inhibition. Among bacterial antagonists,
Bacillus subtilis was very effective in inhibiting the growth of pathogen followed by
Pseudomonas fluorescens and
Bacillus megaterium. Among the antibiotics evaluated under pot culture in the green house, the treatments
viz., Streptomycin, Cefixime and Tetracycline at 500 – 750 ppm were found very effective in reducing the population of
R. solanacearum (0.0x10
4cfu/g of soil). Bacterial antagonists
viz.,
P. fluorescens; B. megaterium and
Bacillus subtilis reduced the pathogen population from (686.66 x 10
4cfu/g of soil) to 3.33x10
4, 4.33x10
4 and 7.33x10
4cfu/g of soil respectively.