| croatia | | phytophthora alni subsp. alni | subspecies | 4 | 0 |
| france | | phytophthora alni subsp. alni | subspecies | 50 | 0 |
| germany | | phytophthora alni subsp. alni | subspecies | 25 | 0 |
| hungary | | phytophthora alni subsp. alni | subspecies | 10 | 0 |
| ireland | | phytophthora alni subsp. alni | subspecies | 1 | 0 |
| poland | | phytophthora alni subsp. alni | subspecies | 14 | 0 |
| spain | | phytophthora alni subsp. alni | subspecies | 7 | 0 |
| united kingdom | | phytophthora alni subsp. alni | subspecies | 7 | 0 |