OCCURRENCE OF MACROPHOMINA PHASEOLINA AND OTHER PATHOGENS OF EUPHORBIA LATHYRIS IN ARIZONA SOILS.

Persistent Link:
http://hdl.handle.net/10150/184758
Title:
OCCURRENCE OF MACROPHOMINA PHASEOLINA AND OTHER PATHOGENS OF EUPHORBIA LATHYRIS IN ARIZONA SOILS.
Author:
YOUNG, DEBORAH JEAN.
Issue Date:
1982
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
Rhizoctonia solani, Pythium aphanidermatum, and Macrophomina phaseolina were isolated from Euphorbia lathyris grown in fields near Tucson, Arizona. R. solani occurred as a damping-off organism in the fall. P. aphanidermatum infected seeds, seedlings, and mature plants in laboratory and greenhouse tests. Although P. aphanidermatum was infrequently isolated from field plants in Arizona, it was a major pathogen of greenhouse plants growing at high temperatures in nonsterile soil. M. phaseolina was a major pathogen. Infection of E. lathyris roots occurred within 1 mo of an October 1980 planting, but symptoms were not significant until June. Sclerotia of this fungus ranged in numbers from 1 to 246 sclerotia/g field soil. Population densities of 0.2 sclerotium/g soil were sufficient to cause more than 90% plant death in field plots. Some plants infected with M. phaseolina were growing in an area newly cleared of native desert vegetation. Subsequently, M. phaseolina was found in uncultivated soils from four vegetative communities in southern Arizona at elevations from 600 to 2,000 m; the fungus also was recovered from roots of several symptomless native plants.
Type:
text; Dissertation-Reproduction (electronic)
Keywords:
Euphorbia lathyris -- Diseases and pests.; Plant diseases.; Soil fungi.; Energy crops -- Arizona.
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Plant Pathology; Graduate College
Degree Grantor:
University of Arizona

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleOCCURRENCE OF MACROPHOMINA PHASEOLINA AND OTHER PATHOGENS OF EUPHORBIA LATHYRIS IN ARIZONA SOILS.en_US
dc.creatorYOUNG, DEBORAH JEAN.en_US
dc.contributor.authorYOUNG, DEBORAH JEAN.en_US
dc.date.issued1982en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractRhizoctonia solani, Pythium aphanidermatum, and Macrophomina phaseolina were isolated from Euphorbia lathyris grown in fields near Tucson, Arizona. R. solani occurred as a damping-off organism in the fall. P. aphanidermatum infected seeds, seedlings, and mature plants in laboratory and greenhouse tests. Although P. aphanidermatum was infrequently isolated from field plants in Arizona, it was a major pathogen of greenhouse plants growing at high temperatures in nonsterile soil. M. phaseolina was a major pathogen. Infection of E. lathyris roots occurred within 1 mo of an October 1980 planting, but symptoms were not significant until June. Sclerotia of this fungus ranged in numbers from 1 to 246 sclerotia/g field soil. Population densities of 0.2 sclerotium/g soil were sufficient to cause more than 90% plant death in field plots. Some plants infected with M. phaseolina were growing in an area newly cleared of native desert vegetation. Subsequently, M. phaseolina was found in uncultivated soils from four vegetative communities in southern Arizona at elevations from 600 to 2,000 m; the fungus also was recovered from roots of several symptomless native plants.en_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
dc.subjectEuphorbia lathyris -- Diseases and pests.en_US
dc.subjectPlant diseases.en_US
dc.subjectSoil fungi.en_US
dc.subjectEnergy crops -- Arizona.en_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplinePlant Pathologyen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.identifier.proquest8227378en_US
dc.identifier.oclc682972402en_US
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