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1. First Report of a Wheat Leaf Rust (Puccinia triticina) Phenotype with High Virulence to Durum Wheat in the Great Plains Region of the United States

Author:
Kolmer, J. A.
Source:
Plant disease 2015 v.99 no.1 pp. 156
ISSN:
0191-2917
Subject:
chlorosis,   etc   ; Puccinia recondita; Triticum turgidum; alleles; color; cultivars; durum wheat; genotype; genotyping; hard red spring wheat; hard red winter wheat; hexaploidy; leaf rust; leaves; mature plants; microsatellite repeats; necrosis; pedigree; phenotype; plant pathogenic fungi; seedlings; surveys; tetraploidy; urediniospores; virulence; Arizona; California; Great Plains region; Kansas; Mediterranean region; Mexico; Middle East; North Dakota; Saskatchewan;     Show all 34 Subjects
Abstract:
... Phenotypes of the wheat leaf rust pathogen Puccinia triticina with high virulence to tetraploid durum wheat (Triticum turgidum) are found regularly in Mexico (5), the Mediterranean region (1), the Middle East (3), and rarely in the Imperial Valley of California and the adjacent area in Arizona. Previous to 2013, these phenotypes had not been found in the Great Plains region of the United States wh ...
DOI:
10.1094/PDIS-05-14-0543-PDN

2. First Report of Colletotrichum truncatum Causing Stem Cankers on Jatropha curcas in Burkina Faso

Author:
Ellison, C. A.; Sawadogo, A.; Braman, S.; Nacro, S.
Source:
Plant disease 2015 v.99 no.1 pp. 14-20
ISSN:
0191-2917
Subject:
chlorosis,   etc   ; Colletotrichum truncatum; Jatropha curcas; branches; dieback; energy crops; etiological agents; fruit growing; growing season; leaves; lodging; monitoring; necrosis; pathogenicity; regrowth; stem cankers; Burkina Faso;     Show all 17 Subjects
Abstract:
... A new disease was identified on the biofuel crop Jatropha curcas in 2012 in Burkina Faso that is causing serious yield losses. The disease was found to be widespread in both Sissili and Comoé Provinces. It causes characteristic leaf lesions, fruit necrosis, and cankers on young stems and branches. There was evidence of multiple infections on plants over the growing season, with regrowth evident fr ...
DOI:
10.1094/PDIS-02-14-0181-RE

3. Pre- and Postinfection Activity of Fungicides in Control of Hop Downy Mildew

Author:
Gent, David H.; Twomey, Megan C.; Wolfenbarger, Sierra N.; Woods, Joanna L.
Source:
Plant disease 2015 v.99 no.6 pp. 858-865
ISSN:
0191-2917
Subject:
chlorosis,   etc   ; Pseudoperonospora humuli; application timing; copper; cymoxanil; dimethomorph; disease control; downy mildew; field experimentation; greenhouse experimentation; greenhouses; leaf area; leaves; mechanism of action; necrosis; resistance management; shoots; soaking; sporangia; sporulation; trifloxystrobin;     Show all 21 Subjects
Abstract:
... Optimum timing and use of fungicides for disease control are improved by an understanding of the characteristics of fungicide physical mode of action. Greenhouse and field experiments were conducted to quantify and model the duration of pre- and postinfection activity of fungicides most commonly used for control of hop downy mildew (caused by Pseudoperonospora humuli). In greenhouse experiments, c ...
DOI:
10.1094/PDIS-10-14-1004-RE