Figure 1:
Root-knot nematodes (Meloidogyne naasi Franklin, 1965) extracted from soil and root samples collected from a football field in Portugal. A: turfgrass root showing galling by root-knot nematodes and excised M. naasi female (arrow); B: perineal pattern; C-G: second-stage juveniles: C: worm-star aggregation; D: whole body; E: pharyngeal region; F: tail; G: Pasteuria penetrans (ex Thorne, 1940) Sayre and Starr, 1985 endospores (arrows) attached to cuticle. Bars = 2000 µm (A); 125 µm (C); 25 µm (B, D-G).
Table 1.
Morphometric characters of second-stage juveniles in the Portuguese population of Meloidogyne naasi Franklin, 1965.
| M. naasi Portuguese population | M. naasi Original description (Franklin, 1965) | |||||
|---|---|---|---|---|---|---|
| Characters | n | Mean | Range | n | Mean | Range |
| Body length | 17 | 457.3 | 440.6-487.2 | 25 | 435 | 418-465 |
| Maximum body width | 17 | 15.5 | 14.5-16.7 | 25 | 15 | 14-18 |
| Stylet length | 17 | 14.4 | 13.6-15.2 | 25 | 14 | 13-15 |
| Tail length | 13 | 82.8 | 76.4-89.9 | 25 | 70 | 52-78 |
| Hyaline tail terminus | 14 | 26.6 | 23.2-32.0 | 25 | n.d. | n.d. |
| a | 17 | 29.6 | 27.8-32.6 | 25 | 28 | 25-32 |
| c | 13 | 5.5 | 5.2-5.8 | 25 | 6.2 | n.d. |