| Abstrakt: |
Root and stem rot of greenhouse cucumber due to Fusarium oxysporum f. sp. radiciscucumerinum causes a lot of damage to greenhouse cucumber every year. In this research, the Bacillus mycoides LUTUUS-AF1 (BmL) from Lotus Co. was compared to Pars Bacil internal biological fungicide (BvP) based on Bacillus velezensis bacteria and an imported biological fungicide (SAS) based on Bacillus velezensis (BvB) bacteria to evaluate its antagonistic ability in laboratory and under greenhouse conditions. The results showed that among the three samples in laboratory condition, B. mycoides strain exhibited the highest inhibitory power at 48%. The imported biological fungicide (SAS) and Pars Bacil treatments provided 30% and 29% inhibition against Fusarium fungus, respectively. In greenhouse conditions, the mortality rate in the control treatment was close to 70%. B. mycoides strain, at concentrations of 0.3% and 0.5% with three repetitions (0, 96, and 192 hours), demonstrated the best efficiency during the 50-day period, with disease incidence close to zero and no observed mortality in the plants. The BvB sample with a concentration of 0.5% and three repetitions (0, 96, and 192 hours) yielded similar results and both were significantly different from Pars Bacil. In general, due to the highest inhibitory power of BmL and effective control of Fusarium fungus in laboratory and under greenhouse conditions, domestic production and its availability at a more reasonable price, the concentration of 0.3 to 0.5% and its repetition three times are recommended. Overall, due to the strong inhibitory effect of B. mycoides in both laboratory and greenhouse conditions, further research is recommended for the production and commercialization of this bacterium. [ABSTRACT FROM AUTHOR] |
