Analysis of historical and current distribution of potato psyllid (Bactericera cockerelli) and the induced plant disease psyllid yellows, in relation to standard climate indices

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dc.contributor.authorXia, Qing
dc.contributor.authorUniversity of Lethbridge. Faculty of Arts and Science
dc.contributor.supervisorJohnson, Dan L.
dc.date.accessioned2017-10-04T21:39:01Z
dc.date.available2017-10-04T21:39:01Z
dc.date.issued2017
dc.degree.levelMastersen_US
dc.description.abstractThe biogeography of herbivorous insects often depends on climate and host plants. Potato psyllid, Bactericera cockerelli (Sulc), is an insect that presents a threat to the western Canadian potato industry. It is native to the USA and Central America, and currently found at very low numbers on the Canadian Prairies. Potato psyllid can transmit Candidatus Liberibacter solanacearum (Lso), causing “zebra chip”, severe tuber necrosis. Feeding by potato psyllid nymphs causes psyllid yellows on potato leaves. Historical records of this disease indicate potato psyllid abundance. I used Random Forest model methods to analyze the climate conditions of the historical psyllid yellows records. I used Maxent models to predict the presence probability of potato psyllids. The results indicate that higher temperatures and moderate precipitation are related to larger potato psyllid populations, and suggest the northern expansion of climatically suitable range in western Canada and decrease in the southwestern USA under climate change.en_US
dc.description.sponsorshipGrowing Forward 2, Canadian Horticulture Council, Potato Growers of Alberta, Agriculture and Agri-Food Canada, Alberta Crop Industry Development Fund Ltd., Alberta Agriculture and Forestry, University of Lethbridgeen_US
dc.embargoNoen_US
dc.identifier.urihttps://hdl.handle.net/10133/4924
dc.language.isoen_USen_US
dc.proquest.subject0306en_US
dc.proquest.subject0329en_US
dc.proquest.subject0353en_US
dc.proquestyesYesen_US
dc.publisherLethbridge, Alta : University of Lethbridge, Dept. of Biological Sciencesen_US
dc.publisher.departmentDepartment of Biological Sciencesen_US
dc.publisher.facultyArts and Scienceen_US
dc.relation.ispartofseriesThesis (University of Lethbridge. Faculty of Arts and Science)en_US
dc.subjectclimatic factorsen_US
dc.subjectenvironmental factorsen_US
dc.subjectpotato industry threatsen_US
dc.subjectpsyllid yellowsen_US
dc.subjecttuber necrosisen_US
dc.subjectzebra chip diseaseen_US
dc.titleAnalysis of historical and current distribution of potato psyllid (Bactericera cockerelli) and the induced plant disease psyllid yellows, in relation to standard climate indicesen_US
dc.typeThesisen_US
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