Nacobbus bolivianus Lordello, Zamith and Boock,
False Root-knot Nematode
Originally described as N. serendipiticus bolivianus by Lordello,
Zamith and Boock, 1961, the nematode was synonymized with N. aberrans
by Sher, 1970. Recent molecular and host-range studies show differences
among Central and South American populations of Nacobbus, with
populations from Bolivia and Peru disticnt from others. Consequently, Reid
et al. (2003). resurrected N. serendipiticus bolivianus and elevated it
to species status: N. bolivianus.
Saccate (0.8 to 1.4 mm long and 0.2 to 0.45 mm wide).
Reported median body size for this species (Length mm; width micrometers; weight micrograms) - Click:
Vermiform and of the same body length as females.
Spicules and gubernaculum.
Bolivia and Peru.
Mature females penetrate roots, become swollen and sedentary, cause
formation of root galls and enlarged cells.
The nematode migrates through plant tissues as a juvenile; it initiates a
gall and becomes sedentary as a young female.
Host Plant Resistance, Non-hosts and Crop Rotation alternatives:
Manzanilla-López R.H. 2010. Speciation within Nacobbus:
consilience or controversy? Nematology 12:321-334.
pez, 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
NacobbusThorne & Allen, 1944 (Nematoda:Pratylenchidae):Systematics,
distribution, biology and management. Nematropica 32:149-227.
Reid, A., Manzanilla-Lo
pez, R. H., Hunt, D.J. 2003. Nacobbus aberrans
(Thorne, 1935) Thorne & Allen, 1944 (Nematoda: Pratylenchidae); a nascent
species complex revealed by RFLP analysis and sequencing of the ITS-rDNA region.