Table 1.
Summary of studies applying different Streptomyces strains as biocontrol agents for the control of rice blast disease caused by Magnaporthe oryzae.
| Biocontrol agent | Type of experiment | Application method | Formulation | Results (percentage inhibition of M. oryzae) | Reference |
|---|---|---|---|---|---|
| Streptomyces strain BG2-53 | Growth chamber experiment | Foliar spraying | Liquid (broth) | Streptomyces BG2-53 showed highest fungal control (98%) than Blasticidin-S (86%) and Tricyclazole (96%) | Lee et al., 2002 |
| Endophytic Streptomyces (S. griseofuscus, S. hygroscopicus, S. globisporus, S. aureus, S. albosporus) | In vitro experiment using dual culture method | Not available | Not available | Streptomyces griseofuscus and Streptomyces hygroscopicus exhibited strongest antagonism against M. oryzae | Tian et al., 2004 |
| S. vinaceusdrappus | In vitro experiment using dual culture method | Not available | Not available | Mycelial growth inhibition of M. oryzae (53.5%) | Ningthoujam et al., 2009 |
| S. sindeneusis isolate 263 | In vitro experiment using dual culture method | Not available | Not available | Antifungal activity against M. oryzae | Zarandi et al., 2009 |
| Greenhouse experiment | Foliar spraying | Liquid (culture filtrates) | Rice plants treated with M. oryzae alone showed typical blast symptoms and 8% diseased leaf area; rice plants treated with M. oryzae plus Streptomyces sindeneusis isolate 263 showed 0.5% diseased leaf area | ||
| S. globisporus JK-1 | In vitro experiment using dual culture method | Not available | Not available | Mycelial growth inhibition of M. oryzae (42.9%) | Li et al., 2011 |
| Greenhouse experiment | Foliar spraying | Liquid (culture filtrates) | Streptomyces globisporus JK-1 treatment (88.3%) showed highest fungal control than Tricyclazole (79.4%), as compared to the inoculated control | ||
| Streptomyces isolate 339 | In vitro experiment using dual culture method | Not available | Not available | Antifungal activity against M. oryzae | Zarandi et al., 2013 |
| S. philanthi RM-1-138 | In vitro experiment using dual culture method | Not available | Not available | Mycelial growth inhibition of M. oryzae (88.73%) | Boukaew and Prasertsan, 2014 |
| S. flavotricini | In vitro experiment using dual culture method | Not available | Not available | Antifungal activity against M. oryzae (40 mm inhibition zone)∗ | Khalil et al., 2014 |
∗The percentage of inhibition of M. oryzae cannot be estimated due to insufficient information reported in the study.