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You searched for: Author "Cowger, Christina" Remove constraint Author: "Cowger, Christina" Journal Plant disease Remove constraint Journal: Plant disease
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1. Managing Fusarium Head Blight in Winter Barley With Cultivar Resistance and Fungicide

Author:
Cowger, Christina,   et al.   ; Arellano, Consuelo; Marshall, David; Fitzgerald, Joshua;     Show all 4 Authors
Source:
Plant disease 2019 v.103 no.8 pp. 1858-1864
ISSN:
0191-2917
Subject:
Calypso; Fusarium head blight; Hordeum vulgare; Thoroughbred; cultivars; deoxynivalenol; field experimentation; growers; malting barley; pesticide application; risk; spring barley; tebuconazole; winter; winter barley; North Carolina; Virginia
Abstract:
... Although there has been research on managing Fusarium head blight (FHB) in spring barley, little has been published on cultivar resistance and optimal fungicide timing for FHB management in winter barley. A 3-year (2015 to 2017) field experiment was conducted to measure FHB resistance of winter barley varieties, gauge the potential benefit from a fungicide, and help determine the optimal timing fo ...
DOI:
10.1094/PDIS-09-18-1582-RE

2. Understanding Yield Loss and Pathogen Biology to Improve Disease Management: Septoria Nodorum Blotch - A Case Study in Wheat

Author:
Cowger, Christina,   et al.   ; Ficke, Andrea; Bergstrom, Gary; Brodal, Guro;     Show all 4 Authors
Source:
Plant disease 2018 v.102 no.4 pp. 696-707
ISSN:
0191-2917
Subject:
Parastagonospora nodorum; case studies; control methods; crop losses; crop rotation; cultivars; disease control; disease severity; economic threshold; fungicides; host-pathogen relationships; integrated pest management; laws and regulations; pesticide application; pests; photosynthesis; plant pathogens; plant pathology; prediction; staple crops; weather; wheat
Abstract:
... The estimated potential yield losses caused by plant pathogens is up to 16% globally and most research in plant pathology aims to reduce yield loss in our crops directly or indirectly. Yield losses caused by a certain disease depend not only on disease severity, but also on the weather factors, the pathogen’s aggressiveness, and the ability of the crop to compensate for reduced photosynthetic area ...
DOI:
10.1094/PDIS-09-17-1375-FE

3. Virulence of Egyptian Blumeria graminis f. sp. tritici Population and Response of Egyptian Wheat Cultivars

Author:
Cowger, Christina,   et al.   ; Abdelrhim, Abdelrazek; Abd-Alla, Harby M.; Abdou, El-Sayed; Ismail, Mamdoh E.;     Show all 5 Authors
Source:
Plant disease 2018 v.102 no.2 pp. 391-397
ISSN:
0191-2917
Subject:
Blumeria graminis; ascospores; cultivars; durum wheat; genes; mildews; powdery mildew; virulence; Egypt
Abstract:
... Powdery mildew, caused by Blumeria graminis (DC.) Speer f. sp. tritici (Em. Marchal), is a serious disease of wheat that can cause a large reduction in yield. In Egypt, high powdery mildew severity has been observed in the past few years on many commercial cultivars of both bread and durum wheat. Little information is available about virulence characteristics of the Egyptian B. graminis f. sp. tri ...
DOI:
10.1094/PDIS-07-17-0975-RE

4. Genes Conferring Sensitivity to Stagonospora nodorum Necrotrophic Effectors in Stagonospora Nodorum Blotch-Susceptible U.S. Wheat Cultivars

Author:
Cowger, Christina,   et al.   ; Bertucci, Matthew; Brown-Guedira, Gina; Murphy, J. Paul;     Show all 4 Authors
Source:
Plant disease 2014 v.98 no.6 pp. 746-753
ISSN:
0191-2917
Subject:
cultivars; cell death; Komagataella pastoris; Parastagonospora nodorum; breeding; bioassays; pathogens; genes; disease resistance; winter wheat; culture filtrates; genetic markers; fungi; Southeastern United States
Abstract:
... Stagonospora nodorum is a necrotrophic fungal pathogen that causes Stagonospora nodorum blotch (SNB), a yield- and quality-reducing disease of wheat. S. nodorum produces a set of necrotrophic effectors (NEs) that interact with the products of host sensitivity genes to cause cell death and increased susceptibility to disease. The focus of this study was determination of NE sensitivity among 25 wint ...
DOI:
10.1094/PDIS-08-13-0820-RE

5. Virulence Structure of the Eastern U.S. Wheat Powdery Mildew Population

Author:
Cowger, Christina,   et al.   ; Parks, Ryan; Carbone, Ignazio; Murphy, J. Paul; Marshall, David;     Show all 5 Authors
Source:
Plant disease 2008 v.92 no.7 pp. 1074
ISSN:
0191-2917
Subject:
Triticum aestivum; wheat; Erysiphe graminis f. sp. tritici; plant pathogenic fungi; powdery mildew; population structure; virulence; strains; disease surveillance; disease resistance; genetic resistance; phenotype; loci; genetic distance; gene flow; microbial genetics
Abstract:
... Little is known about the population structure of wheat powdery mildew in the eastern United States, and the most recent report on virulence in this population involved isolates collected in 1993-94. In the present study, wheat leaves naturally infected with powdery mildew were collected from 10 locations in the southeastern United States in 2003 and 2005 and a collection of 207 isolates was deriv ...
Handle:
10113/21740
DOI:
10.1094/PDIS-92-7-1074