Magnitude and Strain Composition of Aspergillus flavus Soil Surface Populations in Yuma County Commerical Fields

Hdl Handle:
http://hdl.handle.net/10150/210925
Title:
Magnitude and Strain Composition of Aspergillus flavus Soil Surface Populations in Yuma County Commerical Fields
Author:
Nelson, M. R.; Bigelow, D. M.; Orum, T. V.; Howell, D. R.; Cotty, P. J.
Affiliation:
Department of Plant Pathology, University of Arizona, Tucson; Cooperative Extension Service, University of Arizona; Southern Regional Research Center, USDA, ARS
Issue Date:
Mar-1996
Publisher:
College of Agriculture, University of Arizona (Tucson, AZ)
Journal:
Cotton: A College of Agriculture Report
Abstract:
Aflatoxin contamination of cottonseed occurs when cotton bolls are infected by certain strains of the fungus Aspergillus flavus. The risk of aflatoxin contamination in a field is partially dependent on both the quantity of A. flavus and the toxigenicity of A. flavus strains in that field. A. flavus can be easily divided into two major subdivisions known as strain S and strain L. Strain S isolates consistently produce large amounts of aflatoxin and, therefore, the percentage of strain S isolates in the population (percent S) is one indication of the aflatoxin producing potential of the population. Strain S isolates were found in every commercial field sampled at every sampling date in Yuma County, but percent S varied greatly among fields from 4% to 93 %. Significant differences among fields located near each other suggest that locally important, but not yet identified, variables such as crop rotation histories or soil type are affecting A. flavus population magnitude and composition.
Keywords:
Agriculture -- Arizona; Cotton -- Arizona; Cotton -- Diseases
URI:
http://hdl.handle.net/10150/210925
Series/Report no.:
Series P-103; 370103

Full metadata record

DC FieldValue Language
dc.titleMagnitude and Strain Composition of Aspergillus flavus Soil Surface Populations in Yuma County Commerical Fieldsen_US
dc.contributor.authorNelson, M. R.en_US
dc.contributor.authorBigelow, D. M.en_US
dc.contributor.authorOrum, T. V.en_US
dc.contributor.authorHowell, D. R.en_US
dc.contributor.authorCotty, P. J.en_US
dc.contributor.departmentDepartment of Plant Pathology, University of Arizona, Tucsonen_US
dc.contributor.departmentCooperative Extension Service, University of Arizonaen_US
dc.contributor.departmentSouthern Regional Research Center, USDA, ARSen_US
dc.date.issued1996-03-
dc.publisherCollege of Agriculture, University of Arizona (Tucson, AZ)en_US
dc.identifier.journalCotton: A College of Agriculture Reporten_US
dc.description.abstractAflatoxin contamination of cottonseed occurs when cotton bolls are infected by certain strains of the fungus Aspergillus flavus. The risk of aflatoxin contamination in a field is partially dependent on both the quantity of A. flavus and the toxigenicity of A. flavus strains in that field. A. flavus can be easily divided into two major subdivisions known as strain S and strain L. Strain S isolates consistently produce large amounts of aflatoxin and, therefore, the percentage of strain S isolates in the population (percent S) is one indication of the aflatoxin producing potential of the population. Strain S isolates were found in every commercial field sampled at every sampling date in Yuma County, but percent S varied greatly among fields from 4% to 93 %. Significant differences among fields located near each other suggest that locally important, but not yet identified, variables such as crop rotation histories or soil type are affecting A. flavus population magnitude and composition.en_US
dc.subjectAgriculture -- Arizonaen_US
dc.subjectCotton -- Arizonaen_US
dc.subjectCotton -- Diseasesen_US
dc.identifier.urihttp://hdl.handle.net/10150/210925-
dc.relation.ispartofseriesSeries P-103en_US
dc.relation.ispartofseries370103en_US
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