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Factors influencing consumer potato storability in the warm tropics

dc.contributor.authorTupac Yupanqui, Alberto L., author
dc.contributor.authorKnutson, Kenneth W., advisor
dc.contributor.authorHarrison, Monty D., committee member
dc.contributor.authorCranshaw, Whitney S., committee member
dc.date.accessioned2023-01-27T14:52:42Z
dc.date.available2023-01-27T14:52:42Z
dc.date.issued1990
dc.descriptionCovers not scanned.
dc.description.abstractThis study was done to determine the feasibility of and explore ways to store consumer potatoes in the warm tropics and reduce storage losses to acceptable levels. The research was done during 2 years, 1988 and 1989, at the mid-elevation jungle research station of the International Potato Center located at San Ramon (800 m elevation), Peru. Pathogen induced rotting is the major cause of loss during storage in the warm tropics. Studies were done to evaluate the storage potential of clones adapted to the warm tropics and determine if any significant relationship existed between storage potential and rotting response to Erwinia and Fusarium spp. when inoculated separately and simultaneously. Finding a suitable relationship would simplify screening in breeding programs to identify progeny with good storage potential. Some of the more suitable clones that were identified for storage in the warm tropics were Desiree, Kufri Jyoti, Serrana, LT-5 and B71 240.2. A significant relationship between storage potential and rotting induced by inoculation was only obtained when the Erwinia and Fusarium spp. were inoculated simultaneously. Since rapid wound healing is essential to reduce pathogen invasion and rotting, the rapidity of wound healing was evaluated. Thirteen of 15 test clones showed over a 90% reduction in F. solani induced dry rot after only 6 days at 25 C. Thus, this evaluation is probably not sufficiently sensitive to differentiate clones in their storage potential. Delaying harvest for 8 days after vine senescence to allow skin setting was slightly beneficial during the dry season but was detrimental during the wet season. A hazard of delaying harvest is the possibility of increased potato tuber moth (PTM) infestation. Removing visibly diseased, insect infested and damaged tubers before storage was very effective in reducing storage losses due to rotting and PTM infestation. Dipping potatoes in solutions of sodium hypochlorite and thiabendazole was very detrimental. However, dusting with thiabendazole just after harvest and dusting with chloro-isopropyl-phenyl-carbamate (CIPC) after 4 weeks was beneficial. CIPC did not reduced sprouting but completely controlled PTM infestation. This research has shown that it is possible to store potatoes in the warm tropics using the proper clones and procedures.
dc.format.mediumdoctoral dissertations
dc.identifier.urihttps://hdl.handle.net/10217/236133
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado State University. Libraries
dc.relationCatalog record number (MMS ID): 991017318219703361
dc.relationSB211.P8T86 1990
dc.relation.ispartof1980-1999
dc.rightsCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.
dc.subject.lcshPotatoes -- Storage -- Tropics
dc.subject.lcshPotatoes -- Handling -- Tropics
dc.titleFactors influencing consumer potato storability in the warm tropics
dc.typeText
dc.typeStillImage
dcterms.rights.dplaThis Item is protected by copyright and/or related rights (https://rightsstatements.org/vocab/InC/1.0/). You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
thesis.degree.disciplineHorticulture
thesis.degree.grantorColorado State University
thesis.degree.levelDoctoral
thesis.degree.nameDoctor of Philosophy (Ph.D.)

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