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Bandara Gajanayake, K. Raja Reddy, Mark W. Shankle, and Ramon A. Arancibia

expression of several genes, which are influenced by several environmental factors ( Ravi et al., 2009 ). Transplanted slips produce adventitious roots, some of which develop into economically important storage roots through proliferation of cambial cells

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Christopher A. Clark, Washington L. da Silva, Ramón A. Arancibia, Jeff L. Main, Jonathan R. Schultheis, Zvezdana Pesic van-Esbroeck, Chen Jiang, and Joy Smith

batatatis ( da Silva and Clark, 2012 ; Stokes et al., 2012 ). These fungi have also been isolated frequently from symptomless transplants and storage roots and it appears that infection is not a limiting factor to the development of this disease complex

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Chen Jiang, Penelope Perkins-Veazie, Sylvia M. Blankenship, Michael D. Boyette, Zvezdana Pesic-VanEsbroeck, Katherine M. Jennings, and Jonathan R. Schultheis

incidence of symptoms, some being severe. A few other farms had less than 2% incidence, whereas most farms had storage roots exhibiting no symptoms. Internal necrosis symptoms are not evident on the exterior of storage roots, which precludes early detection

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Scovia Adikini, Settumba B. Mukasa, Robert O.M. Mwanga, and Richard W. Gibson

planting by ensuring timely access to planting material in areas prone to drought, a method of sprouting storage roots has been developed ( Namanda, 2012 ) and is being promoted in Uganda, Tanzania, and Malawi by the International Potato Center (CIP). The

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Peter J. Dittmar, Jonathan R. Schultheis, Katherine M. Jennings, David W. Monks, Sushila Chaudhari, Stephen Meyers, and Chen Jiang

to North Carolina growing conditions, producing high yielding and high quality storage roots ( Yencho et al., 2008 ), and because of its adaptability is grown on more than 88% of the commercial acreage across the state ( Schultheis, 2016

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G. Craig Yencho, Kenneth V. Pecota, Jonathan R. Schultheis, Zvezdana-Pesic VanEsbroeck, Gerald J. Holmes, Billy E. Little, Allan C. Thornton, and Van-Den Truong

. 1998. A single cutting was taken from each seedling and planted in the field in May 1998 in an “on-farm” trial and selected as a “single-hill selection” on 9 Sept. 1998. A “single-hill selection” includes the storage roots derived from the single plant

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Fernando Montero de Espinosa Baselga, Jonathan R. Schultheis, Michael D. Boyette, Lina M. Quesada-Ocampo, Keith D. Starke, and David W. Monks

, a grower reported that 1600 tons of sweetpotato roots in storage had a disorder characterized by small brown to black necrotic areas in the flesh near the proximal end of the root, which is where storage roots are removed from the stem ( Dittmar et

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Chad T. Miller and Mark P. Bridgen

. Similarly, in ‘A23’ roots developed soon after planting, 4 weeks, without any imposed storage period. After 4 weeks of storage, a similar but less dramatic trend as that of ‘A09’ was observed in that each subsequent storage treatment after 8 weeks of storage

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Lucia E. Villavicencio, Sylvia M. Blankenship, G. Craig Yencho, Judith F. Thomas, and C. David Raper

that is very susceptible to breakage, with curing and storage usually improving skin toughness ( Boyette et al., 1997 ). Curing is done by placing the roots at 29.4 °C and 85–90% relative humidity for 4–7 d ( Walter and Schadel, 1982 ). In potato

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Susan C. Miyasaka, Marisa Wall, Don LaBonte, and Alton Arakaki

( Follett, 2006 )]. Sweetpotato weevil larvae feed and develop within the storage root of sweetpotato, making it difficult to control the larvae with insecticides and resulting in inedible storage roots ( Thompson et al., 1999 ). Crop losses in Hawai‘i due