Meloidogyne hapla 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 : 262-264

Meloidogyne hapla Chitwood, 1949

Figures 3 , 7

Measurements: Tables 4 , 7

Female (n= 2 perineal-patterns). Only three specimens were recorded and anterior ends were not in optimum condition to determine morphometric characteristics. Perineal-pattern circular to oval, dorsal arch low to medium, apex broadly rounded, inner striae above tail terminus low and round. Lateral lines indistinct, punctuation observed at tail terminus. Wing (wing shaped form in the lateral part of the perineal pattern) present. Phasmids 1–2 µm in diameter, interphasmidial distance 16–21 µm. Vulval slit 13–28 µm long and anus 11–24 µm posterior to vulva.

Male. Males were not observed.

Second-stage juvenile (n= 10). Body 314–737 µm long, vermiform, narrow, ventrally curve or straight. Head hemispherical, continuous, labial disc raised above median lips. Stylet 12–13 µm long, straight. Stylet knobs sloping backward. Dorsal gland opening 2–3 µm behind stylet knobs. Median bulb ovoid, enlarged with oval to fusiform valve. Excretory pore 67–70 µm from anterior end, opposite isthmus. Tail narrow, 43–57 µm long, conical elongated with roundish end and occasionally a clavate appendage observed at tail terminus.

Remarks. The current M. hapla populations fit descriptions of other South African populations ( Kleynhans, 1991), except for the occasional clavate appendage of the J2 tail terminus, noted for the first time in the present study.

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.

FIGURE 7. Light microscopic photos of second stage juveniles (J2) of Meloidogyne hapla obtained from roots of agri- and horticultural crops in South African production areas during 2015 and 2016. A, B: anterior part of body; C, D: variation of tail shape.