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You searched for: Journal Phytopathology Remove constraint Journal: Phytopathology Publication Year 2010 Remove constraint Publication Year: 2010 Source 2010 v.100 no.10 Remove constraint Source: 2010 v.100 no.10 Text Availability Citation in PubAg Remove constraint Text Availability: Citation in PubAg
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1. An Assessment of Mixed-Modeling Approaches for Characterizing Profiles of Time-Varying Response and Predictor Variables

Author:
Madden, L.V.; Paul, P.A.
Source:
Phytopathology 2010 v.100 no.10 pp. 1015-1029
ISSN:
0031-949X
Subject:
plant pathogens; inoculum; inoculum density; environmental factors; temporal variation; simulation models; linear models; mathematical models; correlation; accuracy; model validation; new methods; methodology; Triticum aestivum; wheat; Gibberella zeae; plant pathogenic fungi; scab diseases; prediction; statistical analysis
Abstract:
... A general statistical modeling approach was tested for characterizing the relationship between pathogen inoculum density (or other biological response variables) and environmental variables when the data are collected as temporal profiles of observations within multiple locations or years. The approach, based on the use of linear mixed models, simultaneously accounts for serial correlations of the ...
DOI:
10.1094/PHYTO-01-10-0001
PubMed:
20839937

2. A Quantitative Review of Fungicide Efficacy for Managing Downy Mildew in Cucurbits

Author:
Ojiambo, P.S.; Paul, P.A.; Holmes, G.J.
Source:
Phytopathology 2010 v.100 no.10 pp. 1066-1076
ISSN:
0031-949X
Subject:
Cucurbitaceae; Pseudoperonospora cubensis; plant pathogenic fungi; downy mildew; meta-analysis; quantitative analysis; fungicides; disease severity; field experimentation; data analysis; statistical analysis; species differences; Cucumis sativus; cucumbers; host plants; application timing; application rate; temporal variation; pesticide mixtures
Abstract:
... A meta-analysis of the effect of fungicides on cucurbit downy mildew was conducted using data previously published in Fungicide & Nematicide Tests and Plant Disease Management Reports from 2000 to 2008. Standardized mean effect size (the difference in disease intensity expressed in standard deviation units between the fungicide treatment and its corresponding untreated control) was calculated for ...
DOI:
10.1094/PHYTO-12-09-0348
PubMed:
20839942

3. Combinatorially Selected Peptides for Protection of Soybean Against Phakopsora pachyrhizi

Author:
Fang, Zhiwei D.; Marois, James J.; Stacey, Gary; Schoelz, James E.; English, James T.; Schmidt, Francis J.
Source:
Phytopathology 2010 v.100 no.10 pp. 1111-1117
ISSN:
0031-949X
Subject:
Glycine max; soybeans; Phakopsora pachyrhizi; plant pathogenic fungi; rust diseases; peptides; disease resistance; plant proteins; fungal spores; spore germination; coat proteins; bacteriophages; chemical concentration; microbial growth; leaves; protein-protein interactions; molecular weight; pathogenesis; biological development
Abstract:
... Phakopsora pachyrhizi, the fungal pathogen that causes Asian soybean rust, has the potential to cause significant losses in soybean yield in many production regions of the United States. Germplasm with durable, single-gene resistance is lacking, and control of rust depends on timely application of fungicides. To assist the development of new modes of soybean resistance, we identified peptides from ...
DOI:
10.1094/PHYTO-12-09-0365
PubMed:
20839946

4. Cpkk1, MAPKK of Cryphonectria parasitica, Is Necessary for Virulence on Chestnut

Author:
Rostagno, Laura; Prodi, Antonio; Turina, Massimo
Source:
Phytopathology 2010 v.100 no.10 pp. 1100-1110
ISSN:
0031-949X
Subject:
Castanea sativa; chestnuts; Cryphonectria parasitica; plant pathogenic fungi; fungal diseases of plants; tree diseases; virulence; microbial genetics; mitogen-activated protein kinase; mutants; promoter regions; alleles; messenger RNA; gene silencing; sporulation; conidia; defense mechanisms
Abstract:
... The role of Cpkk1, a mitogen-activated protein kinase from Cryphonectria parasitica, was investigated by generating a number of mutant strains that overexpress, under the control of the cryparin promoter, both the wild-type protein and its allele with an extensive deletion in the catalytic domain. Furthermore, a hairpin construct was built and expressed to cause specific silencing of Cpkk1 mRNA tr ...
DOI:
10.1094/PHYTO-02-10-0044
PubMed:
20839945

5. Diagnosis of Pierce's Disease Using Biomarkers Specific to Xylella fastidiosa rRNA and Vitis vinifera Gene Expression

Author:
Choi, H.K.; Goes da Silva, F.; Lim, H.J.; Iandolino, A.; Seo, Y.S.; Lee, S.W.; Cook, D.R.
Source:
Phytopathology 2010 v.100 no.10 pp. 1089-1099
ISSN:
0031-949X
Subject:
Vitis vinifera; grapes; Xylella fastidiosa; plant pathogenic bacteria; Pierce's disease; disease diagnosis; pathogen identification; ribosomal RNA; microbial genetics; genetic markers; gene expression; signs and symptoms (plants); messenger RNA; expressed sequence tags; reverse transcriptase polymerase chain reaction; gene expression regulation; water stress; biomarkers; early diagnosis
Abstract:
... Pierce's disease (PD), caused by Xylella fastidiosa, represents one of the most damaging diseases of cultivated grape. Management of PD in the vineyard often relies on the removal of infected individuals, which otherwise serve as a source of inoculum for nearby healthy vines. Effective implementation of such control measures requires early diagnosis, which is complicated by the fact that infected ...
DOI:
10.1094/PHYTO-01-10-0014
PubMed:
20839944

6. Factors Contributing to Seasonal Fluctuations in Rust Severity on Ribes missouriense Caused by Cronartium ribicola

Author:
Newcomb, Maria; Upper, Christen D.; Rouse, Douglas I.
Source:
Phytopathology 2010 v.100 no.10 pp. 986-996
ISSN:
0031-949X
Subject:
Ribes; shrubs; wild plants; Cronartium ribicola; plant pathogenic fungi; rust diseases; disease severity; seasonal variation; sporulation; fungal anatomy; disease course; inoculum density; temperate forests; field experimentation; rain; weather; host plants; leaf abscission; necrosis; fruiting bodies; Wisconsin
Abstract:
... Cronartium ribicola, causal agent of white pine blister rust, is a macrocyclic heteroecious rust that cycles between white pines and members of the genus Ribes, which are typically wild plants in North America. To improve predictability of inoculum available for infection of ecologically and commercially important white pines, this research was conducted to identify the factors that influence the ...
DOI:
10.1094/PHYTO-12-09-0349
PubMed:
20839934

7. Genetic Structure of Phytophthora infestans Populations in China Indicates Multiple Migration Events

Author:
Guo, Liyun; Zhu, Xiao-Qiong; Hu, Chia-Hui; Ristaino, Jean Beagle
Source:
Phytopathology 2010 v.100 no.10 pp. 997-1006
ISSN:
0031-949X
Subject:
Phytophthora infestans; plant pathogenic fungi; population genetics; population structure; founder effect; sexual reproduction; fungicide resistance; haplotypes; mitochondrial DNA; genotype; allozymes; restriction fragment length polymorphism; genetic markers; disease outbreaks; temporal variation; host plants; geographical distribution; vigor; China
Abstract:
... One hundred isolates of Phytophthora infestans collected from 10 provinces in China between 1998 and 2004 were analyzed for mating type, metalaxyl resistance, mitochondrial DNA (mtDNA) haplotype, allozyme genotype, and restriction fragment length polymorphism (RFLP) with the RG-57 probe. In addition, herbarium samples collected in China, Russia, Australia, and other Asian countries were also typed ...
DOI:
10.1094/PHYTO-05-09-0126
PubMed:
20839935

8. Host Range, Biological Variation, and Phylogenetic Diversity of Eutypa lata in California

Author:
Trouillas, F.P.; Gubler, W.D.
Source:
Phytopathology 2010 v.100 no.10 pp. 1048-1056
ISSN:
0031-949X
Subject:
Eutypa; plant pathogenic fungi; fungal diseases of plants; host plants; host range; species differences; fruit crops; ornamental plants; wild plants; indigenous species; phenotypic variation; phylogeny; strain differences; ribosomal DNA; internal transcribed spacers; microbial genetics; genes; pathogen identification; sequence analysis; geographical variation; pathogenicity; California
Abstract:
... The objectives of this study were to investigate the host range of Eutypa lata in the major grape-growing regions in California and to analyze the phenotypic variation and phylogenetic diversity of E. lata isolates. Perithecia of E. lata were found on grapevines, in apricot, almond, cherry, apple, and pear tree orchards, and on ornamentals (oleander) and native plant species (California buckeye, b ...
DOI:
10.1094/PHYTO-02-10-0040
PubMed:
20839940

9. Modeling the Competition Between Viruses in a Complex Plant–Pathogen System

Author:
Amaku, Marcos; Burattini, Marcelo Nascimento; Coutinho, Francisco Antonio Bezerra; Massad, Eduardo
Source:
Phytopathology 2010 v.100 no.10 pp. 1042-1047
ISSN:
0031-949X
Subject:
Barley yellow dwarf virus; plant viruses; strain differences; mathematical models; microbial competition; insect vectors; host plants; Avena sativa; oats; virus transmission; Sitobion avenae; Rhopalosiphum padi; insect pests; mutation; New York
Abstract:
... In this article, we propose a mathematical model that describes the competition between two plant virus strains (MAV and PAV) for both the host plant (oat) and their aphid vectors. We found that although PAV is transmitted by two aphids and MAV by only one, this fact, by itself, does not explain the complete replacement of MAV by PAV in New York State during the period from 1961 through 1976; an i ...
DOI:
10.1094/PHYTO-10-09-0289
PubMed:
20839939

10. The 3ADON Population of Fusarium graminearum Found in North Dakota Is More Aggressive and Produces a Higher Level of DON than the Prevalent 15ADON Population in Spring Wheat

Author:
Puri, Krishna D.; Zhong, Shaobin
Source:
Phytopathology 2010 v.100 no.10 pp. 1007-1014
ISSN:
0031-949X
Subject:
Gibberella zeae; plant pathogenic fungi; scab diseases; strain differences; deoxynivalenol; chemotypes; virulence; Triticum aestivum; spring wheat; nivalenol; temporal variation; germplasm screening; host plants; disease severity; disease resistance; genetic resistance; sporulation; fungal spores; population genetics; genetic markers; North Dakota
Abstract:
... Fusarium head blight (FHB) is primarily caused by Fusarium graminearum in North America. Isolates of F. graminearum can be identified as one of three chemotypes: 3-acetyl-deoxynivalenol (3ADON), 15-acetyl-deoxynivalenol (15ADON), and nivalenol (NIV). In this study, we characterized F. graminearum isolates collected in 1980 to 2000 (old collection) and in 2008 (new collection) from North Dakota and ...
DOI:
10.1094/PHYTO-12-09-0332
PubMed:
20839936

11. Wheat Crown Rot Pathogens Fusarium graminearum and F. pseudograminearum Lack Specialization

Author:
Chakraborty, Sukumar; Obanor, Friday; Westecott, Rhyannyn; Abeywickrama, Krishanthi
Source:
Phytopathology 2010 v.100 no.10 pp. 1057-1065
ISSN:
0031-949X
Subject:
Triticum aestivum; wheat; Gibberella zeae; Fusarium pseudograminearum; plant pathogenic fungi; crown rot; pathogenicity; data analysis; host plants; genetic variation; seedlings; statistical analysis; niches; disease severity; variance; cultivars; disease resistance; Australia
Abstract:
... This article reports a lack of pathogenic specialization among Australian Fusarium graminearum and F. pseudograminearum causing crown rot (CR) of wheat using analysis of variance (ANOVA), principal component and biplot analysis, Kendall's coefficient of concordance (W), and κ statistics. Overall, F. pseudograminearum was more aggressive than F. graminearum, supporting earlier delineation of the cr ...
DOI:
10.1094/PHYTO-01-10-0007
PubMed:
20839941