The effect of compost fertilizers, vermicompost and their tea on bacterial vascular wilt and growth indices in tomato seedlings

Control of bacterial diseases is one of the problems in agricultural products, specially greenhouses. In this study, the effect of compost and vermicompost fertilizers and their tea on tomato plants infected with bacterial vascular wilt caused by Ralstonia solanacearum in greenhouse conditions was investigated based on a factorial experiment with a completely randomized design including four types of compost fertilizers, in four concentrations (zero, 20, 30 and 40% by volume). Bacterial suspension with concentration of 108 CFU / mL was added to pot soil at two to three leaf stage of seedlings. The percentage of disease incidence and growth index changes in treatments were compared Took. The results showed that most of the treatments inhibited the disease compared to the control inoculated with bacteria, but the highest rate of disease control was obtained in treatments containing vermicompost with a concentration of 40 and 30% by volume, respectively 66.67% and 60.0%. In the substrate containing 30% by volume of vermicompost tea, the severity of disease decreased by 53.33%. In plants inoculated with bacteria, the best growth indices were obtained in substrates containing vermicompost, compost and vermicompost tea with a concentration of 40% and also compost tea with a concentration of 30%.