|False Root-knot Nematode||Classification||Hosts|
|Morphology and Anatomy||Life Cycle|
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Nacobbus bolivianus Lordello, Zamith and Boock, 1961
Saccate (0.8 to 1.4 mm long and 0.2 to 0.45 mm wide).
Nacobbus dorsalis differs from N. aberrans in the number of annules between vulva and anus (VA = 8-14 in N. dorsalis compared to VA = 15-24 in N. aberrans) and a more posterior vulval position in the immature females (94-97% compared to 91-94 %, respectively). Mature N. dorsalis females are rounder compared to the spindle-shaped N. aberrans females.
Posterior of female - vulva and anus (SEM):
Photograph: I. Cid. del Prado
|Drawing by Charles S. Papp, CDFA|
Vermiform and of the same body length as females.
In California, this species of false root knot nematode is found occasionally in Kern, King, Los Angeles, Monterey, Riverside, and San Luis Obispo counties. Mainly on plants not of agricultural importance.
Mainly reported from non-agricultural plants, and quite rare.
|All juveniles are
and penetrate plant root tips and/or axial roots.
Mature females penetrate roots, become swollen and sedentary, cause formation of root galls and enlarged cells.
For an extensive list of host plant species and their susceptibility, copy the name
select Nemabase and paste the name in the Genus and species box
Eggs are retained in the female body in N. dorsalis.
Life cycle is approximately 48 days at 25 C.
The nematode migrates through plant tissues as a juvenile; it initiates a gall and becomes sedentary as a young female.
For a list of plant species or cultivars (if any) reported to be immune or to have some level of resistance to this nematode species, copy the name
select Nemabase Resistance Search and paste the name in the Genus and species box
Manzanilla-López, R. H., M. A. Costilla, M. Doucet, J. Franco, R. N. Inserra,
P. S. Lehman, I. Cid del Prado-Vera, R. M. Souza, and K. Evans. 2002. The genus
Thorne & Allen, 1944 (Nematoda:Pratylenchidae):Systematics, distribution, biology and management. Nematropica 32:149-227.