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Plant disease
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2013 v.97 no.6
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- Author:
- Holliday, J. L.; Jones, S. A.; Simpson, J. A.; Glen, M.; Edwards, J.; Robinson, A.; Burgman, M. A.
- Source:
- Plant disease 2013 v.97 no.6 pp. 828-834
- ISSN:
- 0191-2917
- Subject:
- Myrtus communis; Puccinia psidii; Puccinia recondita; Rosa; Uromycladium; case studies; clothing; coasts; cotton; denim; disease outbreaks; exposure pathways; flowers; hosts; plastics; polymerase chain reaction; signs and symptoms (plants); spores; wood; New South Wales
- Abstract:
- ... A device comprising a filter attached to a vacuum cleaner was purpose-built to sample rust spores from three potentially high-risk pathways in Australia: passengers, fresh flowers, and sea cargo. The proportion of spores recovered from eight surfaces comparable with those on each pathway (cotton, denim, roses, carnations, chrysanthemums, wood, plastic, and metal) was estimated in the laboratory. S ...
- DOI:
- 10.1094/PDIS-06-12-0565-RE
- http://dx.doi.org/10.1094/PDIS-06-12-0565-RE
- Author:
- Celebi-Toprak, F.; Thompson, J. R.; Perry, K. L.; Fuchs, M.
- Source:
- Plant disease 2013 v.97 no.6 pp. 849
- ISSN:
- 0191-2917
- Subject:
- Arabis mosaic virus; Nematoda; Nicotiana tabacum; RNA; RNA-directed DNA polymerase; Vitis; antibodies; antigens; autumn; coat proteins; cultivars; deformation; genetic databases; germplasm; host range; hybridization; hybrids; internodes; leaves; oligonucleotide probes; polymerase chain reaction; sequence analysis; surveys; tissues; tobacco; vigor; vines; vineyards; viruses; wood; New York; Ontario
- Abstract:
- ... In a limited survey of commercial vineyards and a germplasm repository in Ontario County, NY, 20 vines of Vitis sp. were tested in fall and spring 2010 to 2012 for viruses using a double-antibody sandwich (DAS)-ELISA and macroarray with oligonucleotide probes for grapevine viruses ((3) and unpublished). The plants selected for analysis included those showing atypical growth including leaf deformat ...
- DOI:
- 10.1094/PDIS-07-12-0656-PDN
- http://dx.doi.org/10.1094/PDIS-07-12-0656-PDN
- Author:
- Molnar, Thomas J.; Walsh, Emily; Capik, John M.; Sathuvalli, Vidyasagar; Mehlenbacher, Shawn A.; Rossman, Amy Y.; Zhang, Ning
- Source:
- Plant disease 2013 v.97 no.6 pp. 813-818
- ISSN:
- 0191-2917
- Subject:
- Corylus avellana; blight; breeding; death; diagnostic techniques; dieback; disease control; financial economics; fungi; hazelnuts; internal transcribed spacers; perithecia; quantitative polymerase chain reaction; ribosomal DNA; Oregon
- Abstract:
- ... Eastern filbert blight (EFB) is a devastating disease of European hazelnut, Corylus avellana, which causes economic losses in Oregon, where 99% of the U.S. crop is produced. The causal fungus, Anisogramma anomala, is native to eastern North America, where it is found associated with the American hazelnut (C. americana). Although C. americana is tolerant, EFB causes cankers, branch dieback, and dea ...
- DOI:
- 10.1094/PDIS-11-12-1041-RE
- http://dx.doi.org/10.1094/PDIS-11-12-1041-RE
4. Developing a Real-Time PCR Assay for Detection and Quantification of Pratylenchus neglectus in Soil
- Author:
- Yan, Guiping; Smiley, Richard W.; Okubara, Patricia A.; Skantar, Andrea M.; Reardon, Catherine L.
- Source:
- Plant disease 2013 v.97 no.6 pp. 757
- ISSN:
- 0191-2917
- Subject:
- DNA primers; Pratylenchus neglectus; bioassays; crop rotation; cultivars; detection; internal transcribed spacers; microscopy; plant parasitic nematodes; polymerase chain reaction; quantitative analysis; ribosomal DNA; roots; soil; soil sterilization; wheat; Pacific States
- Abstract:
- ... Pratylenchus neglectus is one of the most widespread and economically important nematodes that invades plant roots and restricts wheat productivity in the Pacific Northwest. It is challenging to quantify P. neglectus using microscopic methods for studies that require large-scale sampling, such as assessment of rotation crops, wheat cultivars, and other management practices. A real-time quantitativ ...
- Handle:
- 10113/56556
- DOI:
- 10.1094/PDIS-08-12-0729-RE
- http://dx.doi.org/10.1094%2FPDIS-08-12-0729-RE
- Author:
- Auger, J.; Pérez, I.; Esterio, M.
- Source:
- Plant disease 2013 v.97 no.6 pp. 843
- ISSN:
- 0191-2917
- Subject:
- Diaporthe; agar; asci; ascospores; canes; color; conidia; ethanol; fruits; fungi; internal transcribed spacers; kiwifruit; mycelium; odors; peeling; perithecia; plant rots; postharvest diseases; pycnidia; relative humidity; tissues; Chile
- Abstract:
- ... Kiwifruit is an important, expanding commercial crop in Chile. Several fungi have been reported to be associated with post-harvest rots of kiwifruit worldwide (2). During 2011 and 2012, kiwifruit produced in the VI and VII regions of Chile, showing symptoms of inner rot, were investigated with the aim of identifying the disease agent. The affected fruits had brown pubescent skin at the stem end th ...
- DOI:
- 10.1094/PDIS-10-12-0982-PDN
- http://dx.doi.org/10.1094/PDIS-10-12-0982-PDN
- Author:
- Alvarez, Elizabeth; Latorre, Michael; Bonilla, Ximena; Sotelo, Guillermo; Miles, John W.
- Source:
- Plant disease 2013 v.97 no.6 pp. 772-779
- ISSN:
- 0191-2917
- Subject:
- Brachiaria; Rhizoctonia; Thanatephorus cucumeris; Urochloa brizantha; blight; disease resistance; genotype; greenhouse experimentation; hybrids; internal transcribed spacers; lowlands; mycelium; provenance; restriction fragment length polymorphism; tropical agriculture; tropics; virulence; Colombia
- Abstract:
- ... Up to 50% of Brachiaria production in the tropics is affected by foliar blight caused by Rhizoctonia spp. Monothallic isolates of Rhizoctonia (n = 147) were cultured from different Brachiaria genotypes in Colombia and morphologically characterized and evaluated in pathogenicity trials in the greenhouse. Based on restriction fragment length polymorphism of the internal transcribed spacer region, 10 ...
- DOI:
- 10.1094/PDIS-04-12-0380-RE
- http://dx.doi.org/10.1094%2FPDIS-04-12-0380-RE
- Author:
- Urrea, K.; Rupe, J. C.; Rothrock, C. S.
- Source:
- Plant disease 2013 v.97 no.6 pp. 807-812
- ISSN:
- 0191-2917
- Subject:
- temperature; cultivars; seedling diseases; trifloxystrobin; fludioxonil; quintozene; azoxystrobin; seedlings; soybeans; Thanatephorus cucumeris; carboxin; soil types; Pythium; planting; mefenoxam; seed treatment; growth chambers
- Abstract:
- ... Seedling diseases are one of the major production problems for soybean. The primary control of soybean seedling diseases is by fungicide seed treatments but comparisons of seed treatments are difficult because stand responses are often erratic in the field. The objective of this study was to determine the efficacy of soybean fungicide seed treatments in naturally infested soils under controlled en ...
- DOI:
- 10.1094/PDIS-08-12-0772-RE
- http://dx.doi.org/10.1094%2FPDIS-08-12-0772-RE
- Author:
- Bassanezi, Renato B.; Montesino, Luiz H.; Gimenes-Fernandes, Nelson; Yamamoto, Pedro T.; Gottwald, Tim R.; Amorim, Lilian; Filho, Armando Bergamin
- Source:
- Plant disease 2013 v.97 no.6 pp. 789-796
- ISSN:
- 0191-2917
- Subject:
- Candidatus Liberibacter; Citrus; Diaphorina citri; Psyllidae; disease incidence; disease outbreaks; field experimentation; greening disease; immigration; industry; inoculum; insecticides; oranges; soil drenching; trees; vector control; wet season; Brazil
- Abstract:
- ... Huanglongbing (HLB), caused by ‘Candidatus Liberibacter’ spp. and transmitted by the Asian citrus psyllid Diaphorina citri (ACP), is an important threat to citrus industries worldwide, causing significant yield loss. The current recommended strategies to manage HLB are to eliminate HLB-symptomatic trees to reduce sources of bacterial inoculum and to apply insecticides to reduce psyllid vector popu ...
- DOI:
- 10.1094/PDIS-03-12-0314-RE
- http://dx.doi.org/10.1094/PDIS-03-12-0314-RE
- Author:
- Machado, Patrícia da S.; Alfenas, Acelino C.; Coutinho, Marcelo M.; Silva, Cláudio M.; Mounteer, Ann H.; Maffia, Luiz A.; de Freitas, Rodrigo G.; Freitas, Camila da S.
- Source:
- Plant disease 2013 v.97 no.6 pp. 780-788
- ISSN:
- 0191-2917
- Subject:
- Botrytis cinerea; Cylindrocladium; Ralstonia solanacearum; Xanthomonas axonopodis; chlorination; conidia; flocculation; forest nurseries; irrigation; irrigation water; plant pathogens; risk reduction; sand; ultrafiltration; water reuse; water treatment
- Abstract:
- ... Interest in rational use and reuse of water has increased in recent years, especially in forest nurseries. However, before water can be reused in nurseries, it must be properly treated to eradicate plant pathogens to reduce risks of pathogen dispersal and losses to disease. In the present study, the efficacy of irrigation water treatment by ultrafiltration and conventional physical-chemical treatm ...
- DOI:
- 10.1094/PDIS-08-12-0721-RE
- http://dx.doi.org/10.1094%2FPDIS-08-12-0721-RE
- Author:
- Yang, W. X.; Liu, F.; Zhang, N.; Ren, X. D.; Liu, D. Q.
- Source:
- Plant disease 2013 v.97 no.6 pp. 840
- ISSN:
- 0191-2917
- Subject:
- Alternaria alternata; DNA; Zanthoxylum piperitum; agar; ambient temperature; blight; branches; carrots; conidia; field experimentation; fungi; glass; inflorescences; internal transcribed spacers; leaf spot; leaves; mycelium; pathogenicity; pathogens; polymerase chain reaction; potatoes; sequence analysis; spraying; tissues; China
- Abstract:
- ... Since 2009, brown leaf spot and panicle blight of Zanthoxylum piperitum (L.) DC. (“liujin,” commonly known as Japanese pepper and Japanese pricklyash) has been observed on 40% of the plants in the test field of Foresty Academy of Science in Hebei Province of China. When symptoms formed on leaves, a thick yellow spot appeared, which then turned brown. When on the spikes, brown lesions were observed ...
- DOI:
- 10.1094/PDIS-09-12-0870-PDN
- http://dx.doi.org/10.1094/PDIS-09-12-0870-PDN
- Author:
- Garibaldi, A.; Gilardi, G.; Ortu, G.; Gullino, M. L.
- Source:
- Plant disease 2013 v.97 no.6 pp. 848
- ISSN:
- 0191-2917
- Subject:
- Cichorium endivia subsp. endivia; DNA primers; agar; air temperature; anamorphs; conidia; disease severity; endive; farms; fluorescent lighting; fresh market; fungi; growth chambers; internal transcribed spacers; leaf spot; leaves; mycelium; pathogenicity; polymerase chain reaction; ribosomal DNA; sequence homology; sodium hypochlorite; spraying; streptomycin; sulfates; summer; tissues; Italy
- Abstract:
- ... During summer 2012, symptoms of a new leaf spot disease were observed in several commercial fields in Treviglio (Bergamo, northern Italy) on plants of curly (Cichorium endivia var. crispum) and Bavarian (C. endivia var. latifolium) endive (Asteraceae). This crop is widely grown in the region for fresh market. The first symptoms on leaves of affected plants consisted of small (1 mm) black-brown spo ...
- DOI:
- 10.1094/PDIS-01-13-0012-PDN
- http://dx.doi.org/10.1094/PDIS-01-13-0012-PDN
- Author:
- Mahmodi, F.; Kadir, J. B.; Wong, M. Y.; Nasehi, A.; Puteh, A.; Soleimani, N.
- Source:
- Plant disease 2013 v.97 no.6 pp. 841
- ISSN:
- 0191-2917
- Subject:
- Colletotrichum truncatum; Glomerella cingulata; Glycine max; actin; anthracnose; chitin synthase; climate; conidia; crops; dieback; field experimentation; fungi; genetic databases; girdling; glyceraldehyde-3-phosphate dehydrogenase; histones; leaves; pathogenicity; pathogens; pods; relative humidity; sequence analysis; soybeans; stems; tubulin; Malaysia
- Abstract:
- ... Soybean (Glycine max L.) is one of the most economically important crops in the world, and anthracnose is known to infect soybean in most countries. Colletotrichum truncatum is the common pathogen causing anthracnose of soybean. However, at least five species of Colletotrichum have been reported on soybean worldwide (2). In July 2010, anthracnose symptoms were observed on soybean in the experiment ...
- DOI:
- 10.1094/PDIS-10-12-0940-PDN
- http://dx.doi.org/10.1094/PDIS-10-12-0940-PDN
13. First Report of Anthracnose of Sunflower Sprouts Caused by Colletotrichum acutatum in New Mexico
- Author:
- French, J. M.; Randall, J. J.; Stamler, R. A.; Segura, A. C.; Goldberg, N. P.
- Source:
- Plant disease 2013 v.97 no.6 pp. 838
- ISSN:
- 0191-2917
- Subject:
- peat; Helianthus annuus; girdling; conidia; ribosomal DNA; farms; financial economics; internal transcribed spacers; agar; pathogens; sequence analysis; cultivars; relative humidity; polymerase chain reaction; hyphae; Colletotrichum acutatum; anthracnose; disease diagnosis; seed germination; cotyledons; color; fungi; New Mexico
- Abstract:
- ... In December 2011, edible sunflower sprouts (Helianthus annus) of two different commercially grown cultivars (Sungrown and Tiensvold) exhibiting stem and cotyledon lesions were submitted to the New Mexico State University Plant Clinic for disease diagnosis. The sample originated from an organic farm in Santa Fe County where the grower utilizes a small indoor growing facility. Stem lesions were elon ...
- DOI:
- 10.1094/PDIS-07-12-0690-PDN
- http://dx.doi.org/10.1094/PDIS-07-12-0690-PDN
- Author:
- Catal, M.; Ikten, C.; Yol, E.; Üstün, R.; Uzun, B.
- Source:
- Plant disease 2013 v.97 no.6 pp. 835
- ISSN:
- 0191-2917
- Subject:
- Brassica rapa; Phytoplasma; Sesamum indicum; almonds; baked goods; cetyltrimethylammonium bromide; computer software; disease incidence; flowering; genetic databases; leaves; nucleotide sequences; oilseed crops; phylogeny; pigeon peas; polymerase chain reaction; restriction fragment length polymorphism; ribosomal DNA; sesame seed; sweets; witches' broom; Turkey (country)
- Abstract:
- ... Sesame (Sesamum indicum L.) is an important oilseed crops widely grown in the southern regions of Turkey. Sesame seeds are primarily used in production of tahini as well as a garnish on sweets and bakery products in the country. Sesame plants with phyllody disease symptoms have increasingly been observed in the fields of Antalya province since 2007. The disease incidence in these fields was found ...
- DOI:
- 10.1094/PDIS-11-12-1011-PDN
- http://dx.doi.org/10.1094/PDIS-11-12-1011-PDN
15. First Report of Bacterial Leaf Spot on Cichorium intybus Caused by Pseudomonas cichorii in Florida
- Author:
- Zhang, S.; Fu, Y.
- Source:
- Plant disease 2013 v.97 no.6 pp. 837
- ISSN:
- 0191-2917
- Subject:
- Chrysanthemum; Cichorium endivia; Cichorium intybus; Pseudomonas cichorii; Taraxacum; agar; air conditioning; arginine deiminase; bacteria; celery; disinfection; economic impact; endive; ethanol; field experimentation; fluorescence; genes; greenhouses; hypersensitivity; leaf spot; leaves; lettuce; levan; nucleotide sequences; pathogenicity; plastic bags; potatoes; ribosomal RNA; runoff; salads; sequence analysis; sodium hypochlorite; soybeans; spraying; tissues; tobacco; Florida
- Abstract:
- ... Italian dandelion (Cichorium intybus L.) is a leafy chicory plant grown as a fresh vegetable in salads. In August 2011, necrotic lesions were observed on leaves of about 20% of the Italian dandelion plants in an experimental field at the Tropical Research and Education Center (TREC) of the University of Florida in Homestead, FL. The lesions were dark brown with a yellow halo and most were irregula ...
- DOI:
- 10.1094/PDIS-05-12-0502-PDN
- http://dx.doi.org/10.1094/PDIS-05-12-0502-PDN
- Author:
- Poojari, S.; Naidu, R. A.
- Source:
- Plant disease 2013 v.97 no.6 pp. 850
- ISSN:
- 0191-2917
- Subject:
- plant viruses; necrosis; Nicotiana benthamiana; basil; Ocimum basilicum; genes; summer; odors; greenhouses; plant diseases and disorders; Potyviridae; industry; nucleocapsid; clones; denaturation; viruses; Tomato spotted wilt orthotospovirus; leaves; container-grown plants; sequence analysis; host range; host plants; Emilia sonchifolia; inoculum; homeowners; reverse transcriptase polymerase chain reaction; nucleotide sequences; RNA; Impatiens necrotic spot tospovirus; India; Austria; Washington (state)
- Abstract:
- ... Basil (Ocimum basilicum L.), a native of India belonging to the Lamiaceae family, is an aromatic herb with distinctive aroma, and several commercial varieties are used extensively for culinary and ornamental purposes. During the summer of 2011 and 2012, potted plants of basil in a commercial greenhouse in the Richland-Kennewick area of Washington State were observed showing foliar symptoms consist ...
- DOI:
- 10.1094/PDIS-10-12-0937-PDN
- http://dx.doi.org/10.1094/PDIS-10-12-0937-PDN
- Author:
- Seo, S. T.; Park, J. H.; Cho, S. E.; Shin, H. D.
- Source:
- Plant disease 2013 v.97 no.6 pp. 847
- ISSN:
- 0191-2917
- Subject:
- Corynespora cassiicola; DNA primers; Hibiscus syriacus; agar; color; conidia; conidiophores; defoliation; flowering; flowers; fungi; genetic databases; greenhouses; herbaria; host range; internal transcribed spacers; leaf spot; leaves; pathogenicity; planting; polymerase chain reaction; ribosomal DNA; shrubs; trees; vigor; weather; Japan; South Korea
- Abstract:
- ... Rose of Sharon, Hibiscus syriacus L., is a flowering shrub in the family Malvaceae planted as the national flower of South Korea. In September 2012, previously unknown leaf spots with premature defoliation were observed on dozens of Rose of Sharon plants growing in the shaded area in a park of Dongducheon, Korea. The same symptoms were found on Rose of Sharon in several localities of Korea in 2012 ...
- DOI:
- 10.1094/PDIS-12-12-1118-PDN
- http://dx.doi.org/10.1094/PDIS-12-12-1118-PDN
- Author:
- Seo, S. T.; Park, J. H.; Cho, S. E.; Shin, H. D.
- Source:
- Plant disease 2013 v.97 no.6 pp. 846
- ISSN:
- 0191-2917
- Subject:
- Corynespora cassiicola; DNA primers; Hibiscus syriacus; agar; color; conidia; conidiophores; defoliation; flowering; flowers; fungi; genetic databases; greenhouses; herbaria; host range; internal transcribed spacers; leaf spot; leaves; pathogenicity; planting; polymerase chain reaction; ribosomal DNA; shrubs; trees; vigor; weather; Japan; South Korea
- Abstract:
- ... Rose of Sharon, Hibiscus syriacus L., is a flowering shrub in the family Malvaceae planted as the national flower of South Korea. In September 2012, previously unknown leaf spots with premature defoliation were observed on dozens of Rose of Sharon plants growing in the shaded area in a park of Dongducheon, Korea. The same symptoms were found on Rose of Sharon in several localities of Korea in 2012 ...
- DOI:
- 10.1094/PDIS-11-12-1065-PDN
- http://dx.doi.org/10.1094/PDIS-11-12-1065-PDN
- Author:
- Auger, J.; Palma, F.; Pérez, I.; Esterio, M.
- Source:
- Plant disease 2013 v.97 no.6 pp. 842
- ISSN:
- 0191-2917
- Subject:
- Botryosphaeria; Neofusicoccum; Persea americana; abiotic stress; agar; ambient temperature; autumn; avocados; bark; branches; canopy; cold season; conidia; conifer needles; containers; cork; dieback; drought; frost injury; fungi; germination; greenhouses; inoculum; internal transcribed spacers; irrigation water; kiwifruit; necrosis; orchards; pathogenicity; pathogens; peat; phylogeny; polymerase chain reaction; pycnidia; ribosomal DNA; sand; sequence analysis; trees; winter; wood; Chile
- Abstract:
- ... Since 2007, Chilean avocado (Persea americana Mill.) orchards have been exposed to several abiotic stress conditions, namely frost damage and drought, due to three consecutive seasons of cold winters and shortage of irrigation water. At the same time, a severe disease resulting in tree dieback of cv. Hass, specifically, was observed in north-central Chile. Symptomatic trees exhibited abundant dead ...
- DOI:
- 10.1094/PDIS-10-12-0951-PDN
- http://dx.doi.org/10.1094/PDIS-10-12-0951-PDN
- Author:
- Wang, M. N.; Chen, X. M.
- Source:
- Plant disease 2013 v.97 no.6 pp. 839
- ISSN:
- 0191-2917
- Subject:
- Berberis vulgaris; Mahonia aquifolium; Puccinia striiformis f. tritici; aeciospores; basidiospores; cultivars; dew; field experimentation; grapes; greenhouses; growth chambers; homozygosity; inoculum; leaves; microsatellite repeats; nectar; ornamental plants; plant pathogenic fungi; plant pathology; progeny; pycniospores; races; seedlings; seeds; shrubs; soil; stripe rust; teliospores; temperature; urediniospores; virulence; wheat; Oregon; Washington (state)
- Abstract:
- ... As the primary host of the stripe rust pathogen, Puccinia striiformis f. sp. tritici (Pst), wheat can be infected by both aeciospores and urediniospores, and later is the host that gives rise to urediniospores and teliospores. Barberry species (e.g., Berberis vulgaris) can be infected by basidiospores, produced from the teliospores of wheat plants, and later gives rise to pycniospores and aeciospo ...
- DOI:
- 10.1094/PDIS-09-12-0821-PDN
- http://dx.doi.org/10.1094/PDIS-09-12-0821-PDN