Journal of Nematology (2005) 37, 383-384

M.L. Mendes, D.W. Dickson, R. Schoellhorn, R. Cetintas and J.A. Brito (2005)
Host status of petunia cultivars to root-knot nematodes
Journal of Nematology 37 (3), 383-384
44th Annual Meeting, Society of Nematologists, Fort Lauderdale, Florida, 9-13 July, 2005
Abstract: The host status of 19 petunia (Petunia hybrid) cultivars and one marigold cultivar to Meloidogyne mayaguensis and M. incognita race 4 were evaluated in a completely randomized design with six replicates in a greenhouse. 'Rutgers' tomato was included as a susceptible host to both nematode species. The inoculum consisted of 3,000 eggs and (or) second-stage juveniles/10 cm pot. The plants were harvested and the number of galls and egg masses per root system were recorded 64 days after inoculation. All petunia cultivars were highly susceptible to both nematodes. Marigold (Tagetes erecta) 'Jamie Spry' was a non-host to both nematodes. The size of galls induced by M. mayaguensis was unusually large compared with those induced by M. incognita. The average gall diameter of M. mayaguensis ranged from 0.10 cm to 0.60 cm on petunia roots and 0.10 cm to 1.1 cm on tomato roots, whereas the gall size of M. incognita on petunia roots was usually very inconspicuous; ranging from 0.05 cm to 0.30 cm, and from 0.05 cm to 0.60 cm on tomato roots. There were no differences in susceptibility of petunia cultivars between the two nematode species (P > 0.05).
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Janete A. Brito, Ramazan Cetintas

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Meloidogyne incognita	Petunia (crop)
	Meloidogyne enterolobii	Petunia (crop)