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Judy A. Thies and Amnon Levi

Watermelon ( C. lanatus var. lanatus ) is an important vegetable crop grown in the United States with an annual production of 2.1 million tons and a farm value of $435 million ( U.S. Department of Agriculture [USDA], 2007 ). Root-knot nematodes

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Sindynara Ferreira, Luiz Antonio A. Gomes, Wilson Roberto Maluf, Vicente Paulo Campos, José Luiz S. de Carvalho Filho, and Daniela Costa Santos

). Root-knot nematodes Meloidogyne spp. are considered major pathogens causing yield losses in Phaseolus vulgaris L., especially in regions with prevalent high temperatures, an environmental factor that increases stress and interferes with the

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Jim C. Cervantes-Flores, G. Craig Yencho, Kenneth V. Pecota, Bryon Sosinski, and Robert O.M. Mwanga

Root-knot nematodes are widespread worldwide and cause significant reductions in the yield and quality of storage roots in sweetpotato ( Clark and Moyer, 1988 ). The worldwide distribution of root-knot nematodes (RKN), Meloidogyne Goeldi species

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Susan L.F. Meyer, Dilip K. Lakshman, Inga A. Zasada, Bryan T. Vinyard, and David J. Chitwood

Root-knot nematodes (RKN; Meloidogyne spp.) are an economically important pathogen on many agricultural plants and are the most commonly reported nematodes on vegetable crops in the United States ( Koenning et al., 1999 ). Because of environmental

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Wenjing Guan, Xin Zhao, Donald W. Dickson, Maria L. Mendes, and Judy Thies

densities and crop responses Annu. Rev. Phytopathol. 14 327 353 Barrett, C.E. Zhao, X. McSorley, R. 2012 Grafting for root-knot nematode control and yield improvement in organic heirloom tomato production HortScience 47 614 620 Brito, J. Powers, T.O. Mullin

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Judy A. Thies, Don W. Dickson, and Richard L. Fery

The southern root-knot nematode, Meloidogyne incognita (Chitwood) Kofoid and White, causes severe yield losses to pepper production in sub-tropical climates throughout the world ( DiVito et al., 1985 , 1992 ; Sasser and Freckman, 1987 ). In

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Charles E. Barrett, Xin Zhao, and Robert McSorley

elucidate a cause. Intermediate levels of disease resistance and yield in self-grafted tomatoes have been reported in previous research ( Rivard, 2006 ). Table 1. Effect of grafting treatments on root-knot nematode galling ratings z of heirloom tomato

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Susan L.F. Meyer, Inga A. Zasada, Shannon M. Rupprecht, Mark J. VanGessel, Cerruti R.R. Hooks, Matthew J. Morra, and Kathryne L. Everts

, 2005 ; Hansson et al., 2008 ; Rothlisberger et al., 2012 ; Vaughn et al., 2006 ). Root-knot nematodes ( Meloidogyne sp.) are among the pathogens that can be suppressed by incorporation of mustard seed meals into soil. Application of ethiopian

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Perry E. Nugent and P.D. Dukes

The southern root-knot nematode, Meloidogyne incognita [(Kofoid & White) Chitwood], causes serious economic losses to melon (Cucumis melo L.) production in the United States. The present study was conducted to determine if separable differences in nematode resistance of Cucumis melo could be found at some inoculum level. Five C. melo lines were compared with Cucumis metuliferus Naud. (C701A), a highly resistant species, for root necrosis, galling, egg mass production, and reproduction when inoculated at 0, 500, 1000, 2000, or 5000 nematode eggs per plant. Using these criteria, melon line C880 inoculated with 1000 eggs per plant was highly susceptible, while PI140471, PI 183311, and the cultivars Chilton, Georgia 47, Gulf Coast, Planters Jumbo, and Southland were less susceptible. In greenhouse tests with an inoculum level of 1000 eggs per plant, low levels of resistance were evident. A thorough screening of the available germplasm against M. incognita may identify higher levels of root-knot nematode resistance for incorporation into improved melon cultivars.

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Judy A. Thies, Jennifer J. Ariss, Richard L. Hassell, Sharon Buckner, and Amnon Levi

-plant fumigation of soil beds with methyl bromide has been the primary method for controlling root-knot nematodes and soilborne diseases in watermelon ( Thies et al., 2010 ). However, in accordance with the Montreal Protocol and the U.S. Clean Air Act, methyl