Meloidogyne javanica ( Treub 1885 ) Chitwood, 1949

Rashidifard, Milad, Fourie, Hendrika, Daneel, Mieke Stefanie & Marais, Mariette, 2019, Morphological and morphometrical identification of Meloidogyne populations from various crop production areas in South Africa with emphasis on M. enterolobii, Zootaxa 4658 (2), pp. 251-274 : 268

Meloidogyne javanica ( Treub 1885) Chitwood, 1949

Figures 3 to 5, 9

Measurements: Tables 3 to 4, 8, 10

Female (n=153 perineal-patterns; n=10 intact females). Body pear-shaped. Stylet 17–21 µm long, basal knobs ovoid and sloping backward. Dorsal gland opening 3–4 µm posterior to stylet knobs. Median bulb 66–87 µm from anterior end, round, muscular with oval valve. Oesophagus lumen lining expanded immediately in front of oval median bulb lumen lining in some specimens. Neck 135–196 µm long. Perineal-pattern rounded to oval, dorsal arch low, apex square to broadly rounded, inner striae above tail terminus low to high. Lateral lines distinct, marked by two lateral lines. Phasmids small 1–2 µm in diameter, interphasmidial distance variable (20–41 µm). Vulval slit 19–32 µm long and 12–25 µm anterior to anus.

Male (n= 5). Body vermiform, 1030–1455 µm long with rounded anteriorly and tapered posteriorly. Cuticle annulated. Head region round, continues and not off set. Stylet 21–23 µm long, straight, cone with pointed tip, shaft cylindrical. Knobs robust and transversely ovoid. Dorsal gland opening 3–5 µm posterior to stylet knobs. Median bulb elongated. Excretory pore 112–179 µm from the anterior end. Tail 12–15 µm long and tapered, not annulated. Spicule 25–30 µm long, ventrally curved, gubernaculum short (7–8 µm). Phasmids pore-like opposite to cloaca.

Second stage juvenile (n= 81)

Body shape vermiform, narrow, mostly curved ventrally and 338–445 µm long. Head round and continues. Stylet 12–16 µm long. Dorsal gland opening 2–4 µm posterior to stylet knobs. Median bulb ovoid, enlarged with oval valve. Excretory pore 69–91 µm from anterior end. Tail narrow, 36–69 µm long, conical elongated and tapered with roundish tip.

Remarks. The characteristics of this species compared well with the other South African M. javanica populations described by Kleynhans (1991) but differed in female stylet length, (17–21 µm vs 16–18 µm) and male body length (1030–1455 µm vs 1035–1668 µm).

Figures

FIGURE 3. Variation in the perineal-pattern morphology within and among different mature females of Meloidogyne spp. populations sampled in agri- and horticultural production areas during 2015 and 2016. A–D: Meloidogyne enterolobii; E–H: Meloidogyne javanica; I–L: Meloidogyne incognita; M: Meloidogyne hapla.