Table 1.
Average numbers of all nematodes, the relative percentage of plant-parasitic nematodes, and numbers of specific groups of plant-parasitic nematodes found in roots and rhizosphere soil samples of Brassica nigra.
| Elderveld | Heteren | Zetten | |
|---|---|---|---|
| 51°57′N,5°52′E | 51°57′N,5°45′E | 51°55′N,5°43′E | |
| Total number of nematodes per plant sample | 348 | 848 | 563 |
| (68–1250) | (80–1485) | (121-1859) | |
| Percentage plant-parasitic nematodes of total | 6.2% | 72.8 | 47.2 % |
| (0–17.6) | (46.6–90.0) | (18.2-70.4) | |
| Paratylenchus | n.d. | 51 | 229 |
| (2–132) | (11-891) | ||
| Ectoparasites rest | 20 | 22 | 4 |
| (0–121) | (0–77) | (0-11) | |
| Pratylenchus spp. | 6 | 370 | 108 |
| (0–22) | (23–1023) | (0-407) | |
| Tylenchidae | 17 | 116 | 7 |
| (0–99) | (29–319) | (0-11) | |
| Meloidogyne spp. | n.d. | 20 | n.d. |
| (0–55) | |||
| Heterodera | n.d. | 2 | n.d. |
| (0–11) |
The plants were collected in three Dutch populations (column headings give names plus geolocation; n = 5 plants per population, except Elderveld n = 6) in the summer of 2004. Numbers between brackets give the range (minimum – maximum) for each count. n.d., not detected.