Journal of Nematology (2004) 36, p. 308 (Brito et al.)

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Janete A. Brito, J.D. Stanley, R. Cetintas, M. Di Vito, J.A. Thies and D.W. Dickson (2004)
Reproduction of Meloidogyne mayaguensis from Florida on root-knot nematode resistant tomato and pepper
Journal of Nematology 36 (3), 308-308
paper presented at the Society of Nematologists 43rd Annual Meeting, Estes Park, Colorado 7-11 August 2004
Abstract: Meloidogyne mayaguensis is a highly virulent pathogen of many crops including tomato and pepper. Isolates of this pathogen collected in other countries have been reported to reproduce on Mi-1 gene resistant tomato, which provides resistance to the major root-knot nematode species. Studies were conducted to determine the reproduction of an M. mayaguensis isolate from Florida on root-knot nematode resistant tomato and pepper. M. incognita race 4 was used as a control. Four resistant tomato genotypes BHN543, BHN 585, BHN 586, and Sanibel were compared with the susceptible 'Rutgers' tomato, and four resistant pepper genotypes Charleston Bell, Lines 9913/2, 97.9001, and 97.9008 were compared with the susceptible 'Resistant Giant' pepper. Tomato was tested at 22 and 33 °C in growth chambers, and at 26 ± 1.8°C in a growth room. M. mayaguensis reproduced on all Mi-1 gene tomato at all temperatures, whereas M. incognita reproduced only at 33 °C. Pepper, which was tested at 24 °C, was infected only by M. mayaguensis. Galling and egg mass indicies, and the reproduction factor for M. mayaguensis were significantly different than those for M. incognita race 4 in all resistant tomato and pepper genotypes. M. mayaguensis from Florida overcame the Mi-1 resistance gene in tomato genotypes, and N resistance gene on pepper 'Charleston Bell,' and other gene(s) that confers resistance to root-knot nematodes on pepper lines 9913/2; 97.9001, 97.9008.
Database assignments for author(s): Janete A. Brito, Judy A. Thies, Ramazan Cetintas

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution
resistance/tolerance/defence of host


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Meloidogyne incognita Green pepper/chilli (Capsicum) U.S.A. (SE)
Meloidogyne incognita Tomato (Solanum lycopersicum) U.S.A. (SE)
Meloidogyne enterolobii Green pepper/chilli (Capsicum) U.S.A. (SE)
Meloidogyne enterolobii Tomato (Solanum lycopersicum) U.S.A. (SE)