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zucchini squash, Coolong (p. 296) found that even without virus or disease pressure, yields of both yellow and zucchini squash were more than 30% lower in the fall than in the spring, despite similar numbers of harvests. The consistency of these findings

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Don R. La Bonte, Christopher A. Clark, Tara P. Smith, and Arthur Q. Villordon

‘Bonita’ sweetpotato [ Ipomoea batatas (L.) Lam.] was developed by the Louisiana Agricultural Experiment Station to provide a specialty-type white-fleshed, tan-skinned cultivar similar to ‘O'Henry’ but with southern root-knot nematode and soil rot

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Arthur Villordon, Ron Sheffield, Jose Rojas, and Yin-Lin Chiu

Ecology & Hydrology Wallingford, UK Clark, C.A. Hoy, M.W. 2006 Effects of common viruses on yield and quality of Beauregard sweetpotato in Louisiana Plant Dis. 90 83 88 Constantin, R.J. Hernandez, T.P. Jones, L.G. 1974 Effects of irrigation and nitrogen

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Arthur Villordon, Julio Solis, Don LaBonte, and Christopher Clark

agroclimatic variables measured within 20 DAT and U.S. #1 sweetpotato yield from experimental plots under uniform management conditions. We assumed the absence of influence from weeds, disease, insect pests, and chemical injury. The long-term goal is to develop

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Agricultural Center, Baton Rouge, LA 70803 Viral diseases can lower sweetpotato yields. Currently, the most widely used control strategy for sweetpotato viruses is the implementation of programs that provide virus-tested materials to growers. However

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Aliya Momotaz, Jay W. Scott, and David J. Schuster

loci conferring to members of the tomato infecting begomoviruses 343 362 Czosnek H. Tomato yellow leaf curl virus disease: Management, molecular biology, and breeding for resistance Springer Dordrecht, The Netherlands

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watermelons for the past six growing seasons in southwest and west-central Florida where it has caused significant economic impact to watermelon production. The virus disease situation in watermelon (and cucurbits in general) recently worsened in Florida with

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disease in sweetpotato is the Sweet potato virus disease (SPVD), a result of co-infection of Sweet potato chlorotic stunt virus (SPCSV) and Sweet potato feathery mottle virus (SPFMV). Characteristic symptoms include chlorosis, small, deformed leaves

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John L. Coffey, Alvin M. Simmons, B. Merle Shepard, Yaakov Tadmor, and Amnon Levi

important vectors of numerous plant viruses ( Kousik et al., 2012 ; Togni et al., 2010 ). The sweetpotato whitefly, Bemisia tabaci (Gennadius), is particularly abundant in warm habitats ( McKenzie et al., 2004 ) and feeds on over 1000 plant species ( Abd

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Matthew A. Cutulle, Howard F. Harrison Jr., Chandresakar S. Kousik, Phillip A. Wadl, and Amnon Levi

viruses that would infect economically important watermelon lines ( Ling et al., 2013 ). Crown rot ( Phytophthora capsici Leonian) disease, root-knot nematodes, and whiteflies are reduced with certain bottle gourd varieties as well ( Kousik et al., 2012