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Agricultural Science Commons™

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2005

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Articles 121 - 126 of 126

Full-Text Articles in Agricultural Science

Post-Release Evaluation Of Biological Control Of Bemisia Tabaci Biotype ‘‘B’’ In The Usa And The Development Of Predictive Tools To Guide Introductions For Other Countries, John A. Goolsby, Paul J. Debarro, Alan A. Kirk, Robert W. Sutherst, Luis Canas, Matthew A. Ciomperlik, Peter C. Ellsworth, Juli R. Gould, Diana M. Hartley, Kim A. Hoelmer, Steven E. Naranjo, Mike Rose, William J. Roltsch, Paul A. Ruiz, Charles H. Pickett, Don C. Vacek Jan 2005

Post-Release Evaluation Of Biological Control Of Bemisia Tabaci Biotype ‘‘B’’ In The Usa And The Development Of Predictive Tools To Guide Introductions For Other Countries, John A. Goolsby, Paul J. Debarro, Alan A. Kirk, Robert W. Sutherst, Luis Canas, Matthew A. Ciomperlik, Peter C. Ellsworth, Juli R. Gould, Diana M. Hartley, Kim A. Hoelmer, Steven E. Naranjo, Mike Rose, William J. Roltsch, Paul A. Ruiz, Charles H. Pickett, Don C. Vacek

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Climatic matching and pre-release performance evaluation were useful predictors of parasitoid establishment in a retrospective analysis of a classical biological control program against Bemisia tabaci biotype ‘‘B’’ in the USA. Laboratory evaluation of 19 imported and two indigenous parasitoid species in quarantine on B. tabaci showed that the Old World Eretmocerus spp, had the highest attack rate. The climate matching program CLIMEX was used to analyze the establishment patterns of five Old World Eretmocerus spp. introduced to the Western USA. The top matches ±10% for the climate of the area of introduction and origin of the introduced parasitoids always included …

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Protocols For Nationally Coordinated Laboratory And Field Research On Manure Nitrogen Mineralization, C. W. Honeycutt, T. S. Griffin, Brian J. Wienhold, Bahman Eghball, S. L. Albrecht, J. M. Powell, B. L. Woodbury, K. R. Sistani, R. K. Hubbard, H. A. Torbert, R. A. Eigenberg, R. J. Wright, M. D. Jawson Jan 2005

Protocols For Nationally Coordinated Laboratory And Field Research On Manure Nitrogen Mineralization, C. W. Honeycutt, T. S. Griffin, Brian J. Wienhold, Bahman Eghball, S. L. Albrecht, J. M. Powell, B. L. Woodbury, K. R. Sistani, R. K. Hubbard, H. A. Torbert, R. A. Eigenberg, R. J. Wright, M. D. Jawson

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

The National Program structure of USDA-ARS provides an opportunity to coordinate research on problems of national and global significance. A team of USDA-ARS scientists is conducting nationally coordinated research to develop predictions of manure N availability to protect water quality and improve farm solvency. Experimental design and research protocols were developed and used in common across all participating locations. Laboratory incubations are conducted at each location with a minimum of three soils, three temperatures, two wetting/drying regimes, and two manure treatments. A soil from the central United States (Catlin silt loam, fine-silty, mixed, superactive, mesic Oxyaquic Argiudoll) is used as …

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Isolation And Enrichment Of Abundant Microsatellites From A Channel Catfish (Ictalurus Punctatus) Brain Cdna Library, Dan Nonneman, Geoffrey C. Waldbieser Jan 2005

Isolation And Enrichment Of Abundant Microsatellites From A Channel Catfish (Ictalurus Punctatus) Brain Cdna Library, Dan Nonneman, Geoffrey C. Waldbieser

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Efforts to construct a genetic linkage map of channel catfish have involved identification of random genomic microsatellite markers, as well as anchored Type I loci (expressed genes) from channel catfish. To identify Type I markers we constructed a directional cDNA library from brain tissue to obtain expressed catfish sequences that could be used for single nucleotide polymorphism (SNP) marker development. These cDNA sequences surprisingly contained a high proportion of microsatellites (about 14%) in noncoding regions of expressed sequence tags (ESTs), many of which were not associated with known sequences. To further identify cDNAs with microsatellites and reduce the number of …

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Prevalence Of Pathogenic Yersinia Enterocolitica Strains In Pigs In The United States, Saumya Bhaduri, Irene V. Wesley, Eric J. Bush Jan 2005

Prevalence Of Pathogenic Yersinia Enterocolitica Strains In Pigs In The United States, Saumya Bhaduri, Irene V. Wesley, Eric J. Bush

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Yersinia enterocolitica is considered an important food-borne pathogen impacting the pork production and processing industry in the United States. Since this bacterium is a commensal of swine, the primary goal of this study was to determine the prevalence of pathogenic Y. enterocolitica in pigs in the United Sates using feces as the sample source. A total of 2,793 fecal samples were tested for its presence in swine. Fecal samples were collected from late finisher pigs from 77 production sites in the 15 eastern and midwestern pork-producing states over a period of 27 weeks (6 September 2000 to 20 March 2001). …

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Biocontrol Agents Applied Individually And In Combination For Suppression Of Soilborne Diseases Of Cucumber, Daniel P. Roberts, Scott M. Lohrke, Susan L. F. Meyer, Jeffry S. Buyer, John H. Bowers, C. Jacyn Baker, Wei Li, Jorge T. De Souza, Jack A. Lewis, Soohee Chung Jan 2005

Biocontrol Agents Applied Individually And In Combination For Suppression Of Soilborne Diseases Of Cucumber, Daniel P. Roberts, Scott M. Lohrke, Susan L. F. Meyer, Jeffry S. Buyer, John H. Bowers, C. Jacyn Baker, Wei Li, Jorge T. De Souza, Jack A. Lewis, Soohee Chung

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

The soilborne pathogens Rhizoctonia solani, Pythium ultimum, and Meloidogyne incognita can cause severe economic losses to field- and greenhouse-grown cucumber. A collection of bacterial isolates and isolates GL3 and GL21 of Trichoderma virens were screened for suppression of diseases caused by these pathogens. T. virens isolates GL3 and GL21 provided the most effective suppression of damping-off caused by R. solani in greenhouse bioassays. Burkholderia ambifaria BC-F, B. cepacia BC-1, and Serratia marcescens N1-14 also provided significant suppression of R. solani relative to the pathogen check in some experiments. T. virens isolates GL3 and GL21 and S. marcescens isolates …

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Risk And Ethics In Biological Control, Ernest S. Delfosse Jan 2005

Risk And Ethics In Biological Control, Ernest S. Delfosse

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

All introduced natural enemies present a degree of risk to nontarget species. Since most biological control programs use relatively host-specific natural enemies, the risk to nontarget species is generally very low, particularly from biological control of weeds, which uses extensively tested and validated host-specificity testing procedures to predict risk. However, many of the published comments about risks of biological control are superficial or misleading, often inappropriately lumping risk from all taxa of agents as “the risk of biological control,” and ignore the potential benefits, rather than dealing with species-by-species risk and benefits. Particularly confounding accurate predictions is the common mixing …

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