| Plants | ||
| Scientific name | Cultivar | Common name |
| Brassica oleracea | Ranten (Sakata Seed, Kanagawa, Japan) | Cabbage |
| Solanum lycopersicum | Frutica (Takii, Kyoto, Japan) | Tomato |
| Oryza sativa | Nipponbare (Nouken, Kyoto, Japan) | Rice |
| Glycine max | Okuharawase (Sakata Seed, Kanagawa, Japan) | Soybean |
| Cucumis sativus | Sagami Hanjiro (Noguchi Seeds, Saitama, Japan) | Cucumber |
| Microbes | ||
| Strain | Description | Bacterial suspension for inoculation (cells mL−1) |
| Pseudomonas syringae pv. maculicola MAFF 302783 | Causal agent of bacterial leaf spot of cabbage | 105 |
| P. syringae pv. tomato MAFF 302665 | Causal agent of bacterial speck of tomato | 103 |
| P. syringae pv. oryzae MAFF 301529 | Causal agent of bacterial halo blight of rice | 109 |
| P. syringae pv. glycinea MAFF 301683 | Causal agent of bacterial blight of soybean | 104 |
| P. syringae pv. lachrymans MAFF 301322 | Causal agent of marginal blight of cucumber | 104 |
| Bacillus subtilis ATCC 21556 | Iturin A-producing bacteria |