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| Hordeum (1) |
| Proline (1) |
| Rhopalosiphum padi (1) |
| Schizaphis graminum (1) |
| Aphids (1) |
| Barley (1) |
| Betaine (1) |
| Gramine (1) |
| Gramineae (1) |
| Greenbug (1) |
| Hordeum (1) |
| Proline (1) |
| Rhopalosiphum padi (1) |
| Schizaphis graminum (1) |