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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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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

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Ke Cao, Lirong Wang, Gengrui Zhu, Weichao Fang, Chenwen Chen, and Pei Zhao

Root-knot nematodes are damaging pests of fruit tree crops and numerous other perennial or annual plants. Several rootstock breeding programs using interspecific hybridization have introduced useful traits for size control, adaptation to the new

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Judy A. Thies, Richard F. Davis, John D. Mueller, Richard L. Fery, David B. Langston, and Gilbert Miller

Root-knot nematode-resistant `Charleston Belle' bell pepper (Capsicum annuum L. var. annuum) and metam sodium treatment were evaluated for managing the southern root-knot nematode [Meloidogyne incognita (Chitwood) Kofoid and White] in fall-cropped cucumber (Cucumis sativus L.). `Charleston Belle' and its susceptible recurrent parent, `Keystone Resistant Giant', were planted as spring crops at Blackville, S.C., and Tifton, Ga. `Charleston Belle' exhibited high resistance and `Keystone Resistant Giant' was susceptible at both locations. After termination of the bell pepper crop, one-half of the plots were treated with metam sodium delivered through the drip irrigation system. Cucumber yields and numbers of fruit were highest for cucumber grown in plots treated with metam sodium following either `Charleston Belle' or `Keystone Resistant Giant'; however, root gall severity and numbers of M. incognita eggs in the roots were lowest for cucumber grown in plots treated with metam sodium following `Charleston Belle'. Conversely, root gall severity and nematode reproduction were highest for cucumber grown in plots following `Keystone Resistant Giant' without metam sodium treatment. Application of metam sodium through the drip irrigation system following a spring crop of root-knot nematode-resistant bell pepper should reduce severity of root galling and reproduction of M. incognita as well as increase fruit yield of fall-cropped cucumber.

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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