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You searched for: Journal Plant disease Remove constraint Journal: Plant disease Publication Year 2012 Remove constraint Publication Year: 2012 Source 2012 v.96 no.8 Remove constraint Source: 2012 v.96 no.8
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1. A Cut-Stem Inoculation Technique to Evaluate Soybean for Resistance to Macrophomina phaseolina

Author:
Twizeyimana, M.; Hill, C. B.; Pawlowski, M.; Paul, C.; Hartman, G. L.
Source:
Plant disease 2012 v.96 no.8 pp. 1210-1215
ISSN:
0191-2917
Subject:
Macrophomina phaseolina; Phaseolus lunatus; charcoal rot; field experimentation; fungi; genotype; genotype-environment interaction; growth chambers; pathogens; soybeans
Abstract:
... Charcoal rot of soybean is caused by the fungal pathogen Macrophomina phaseolina. Effective and reliable techniques to evaluate soybean for resistance to this fungus are needed to work toward a management scheme that would utilize host resistance. Three experiments were conducted to investigate the use of a cut-stem inoculation technique to evaluate soybean genotypes for resistance to M. phaseolin ...
DOI:
10.1094/PDIS-02-12-0126-RE

2. AFLP, Pathogenicity, and VCG Analyses of Fusarium oxysporum and Fusarium pseudocircinatum from Acacia koa

Author:
Shiraishi, Ayami; Leslie, John F.; Zhong, Shaobin; Uchida, Janice Y.
Source:
Plant disease 2012 v.96 no.8 pp. 1111-1117
ISSN:
0191-2917
Subject:
Acacia koa; Fusarium oxysporum; amplified fragment length polymorphism; dieback; mortality; seedlings; trees; virulence; virulent strains; Hawaii
Abstract:
... Acacia koa (koa), a native tree in Hawaii, suffers from a dieback caused by Fusarium oxysporum. Pathogenicity tests, vegetative compatibility group (VCG) tests, and amplified fragment length polymorphisms (AFLP) analyses were conducted on Fusarium isolates recovered from diseased koa. Koa seedling mortality with individual strains ranged from 0 to 85%, with 42% of the strains killing no seedlings. ...
DOI:
10.1094/PDIS-06-11-0491

3. A Systematic Study Reveals that Xylella fastidiosa Strains from Pecan Are Part of X. fastidiosa subsp. multiplex

Author:
Melanson, R. A.; Sanderlin, R. S.; McTaggart, A. R.; Ham, J. H.
Source:
Plant disease 2012 v.96 no.8 pp. 1123-1134
ISSN:
0191-2917
Subject:
Citrus; Nerium oleander; Vitis; Xylella fastidiosa; crops; defoliation; genetic variation; host range; inoculum; internal transcribed spacers; leaves; ornamental plants; pecans; phylogeny; polymerase chain reaction; repetitive sequences; ribosomal RNA; scorch; shade trees; Louisiana
Abstract:
... Xylella fastidiosa causes disease in a number of economically important crops, ornamental plants, and shade trees, including grapevine, citrus, oleander, and sycamore. In pecan, X. fastidiosa causes pecan bacterial leaf scorch (PBLS), which leads to defoliation and reduces nut yield. No economically effective treatments are available for PBLS. In order to improve PBLS management practices, it is n ...
DOI:
10.1094/PDIS-09-11-0730-RE

4. Bacterial Stripe of Hog Millet Caused by Acidovorax avenae subsp. avenae, a New Disease in Korea

Author:
Myung, I. S.; Choi, J. K.; Wu, J. M.; Lee, J. Y.; Yoo, H. L.; Shim, H. S.
Source:
Plant disease 2012 v.96 no.8 pp. 1222
ISSN:
0191-2917
Subject:
Acidovorax avenae subsp. avenae; DNA primers; Oryza sativa; Panicum miliaceum; Zea mays; agar; arabinitol; bacteria; carboxylic ester hydrolases; cell suspension culture; color; disease incidence; economic impact; ethanol; flagellum; gelatin; genetic databases; greenhouses; intergenic DNA; leaves; liquefaction; maltose; mannitol; milk; millets; nitrate reduction; nucleotide sequences; pathogenicity; polymerase chain reaction; relative humidity; ribosomal RNA; rice; sodium citrate; sweetcorn; swine; vascular bundles; Korean Peninsula
Abstract:
... In July 2011, bacterial stripe was observed on a commercial field of hog millet (Panicum miliaceum L.) in Chuncheon, Korea, with a disease incidence of 37% in the field. Symptoms on leaves included reddish-brown, long, narrow stripes that varied in length and were sharply delineated by uninfected adjacent vascular bundles. Eleven bacterial isolates (BC3107, BC3214 to BC3223) were recovered on tryp ...
DOI:
10.1094/PDIS-03-12-0241-PDN

5. Effect of Lactofen, Azoxystrobin, and Genotypes on Charcoal Rot, Phomopsis Seed Decay, and Pod and Stem Blight in Soybean

Author:
Cross, Cory; Wrather, Allen; Fothergill, Kent; Shannon, Grover; Li, Shuxian; Shumway, Calvin; Rupe, John
Source:
Plant disease 2012 v.96 no.8 pp. 1154-1158
ISSN:
0191-2917
Subject:
Diaporthe; azoxystrobin; blight; charcoal rot; developmental stages; economic impact; genotype; introduced plants; lactofen; plant pathogenic fungi; planting; soybeans; United States
Abstract:
... Yield-limiting diseases such as charcoal rot and Phomopsis seed decay have a significant impact on the economic potential for soybean because there are few methods for management of these diseases. The objectives of this study were to determine the development of charcoal rot, infection of seed by Phomopsis spp., and severity of pod and stem blight on Asgrow 4403, Delta Pine 5806, United States De ...
DOI:
10.1094/PDIS-09-11-0810-RE

6. First Report of Broad bean wilt virus 2 in Echinacea purpurea in China

Author:
Li, G. F.; Wei, M. S.; Ma, J.; Zhu, S. F.
Source:
Plant disease 2012 v.96 no.8 pp. 1232
ISSN:
0191-2917
Subject:
plant viruses; leaf rolling; necrosis; Nicotiana benthamiana; medicinal plants; sap; Chenopodium quinoa; Echinacea purpurea; Tobacco rattle virus; Gomphrena globosa; Broad bean wilt virus 2; tomatoes; plant diseases and disorders; Capsicum annuum; enzyme-linked immunosorbent assay; amino acids; monoclonal antibodies; secondary metabolites; viruses; Tomato spotted wilt orthotospovirus; leaves; coat proteins; sequence analysis; complementary DNA; Datura stramonium; indicator species; protein subunits; polymerase chain reaction; Physalis pubescens; molecular cloning; deformation; RNA; Cucumber mosaic virus; Tetragonia tetragonoides; China
Abstract:
... Field-grown Echinacea purpurea plants showing necrosis, leaf roll, yellow mosaic, and mosaic symptoms in leaves were collected in June 2010 in Huairou, Beijing, China. ELISAs of extracts of four samples showed that one sample with mosaic symptoms had a positive reaction with Broad bean wilt virus 2 (BBWV-2) monoclonal antibody provided by Professor X. P. Zhou (1). The monoclonal antibody recognize ...
DOI:
10.1094/PDIS-01-12-0068-PDN

7. First Report of Flower Anthracnose Caused by Colletotrichum karstii in White Phalaenopsis Orchids in the United States

Author:
Jadrane, I.; Kornievsky, M.; Desjardin, D. E.; He, Z.-H.; Cai, L.; Hyde, K.
Source:
Plant disease 2012 v.96 no.8 pp. 1227
ISSN:
0191-2917
Subject:
Colletotrichum; DNA; Phalaenopsis; agar; anthracnose; chloroplasts; color; conidia; corolla; ethanol; greenhouses; hybrids; hyphae; internal transcribed spacers; microscopy; mycelium; pathogens; phylogeny; relative humidity; ribosomal RNA; sodium hypochlorite; tissues; California; China; Thailand
Abstract:
... In October 2010, a Colletotrichum species was isolated from white Phalaenopsis flowers growing in a greenhouse in San Francisco, CA. This Phalaenopsis is a common commercial orchid hybrid generated mostly likely from Phalaenopsis amabilis and P. aphrodite. The white petals showed anthracnose-like lesions where necrotic tissue is surrounded by a ring of green tissue. The green halo tissues around t ...
DOI:
10.1094/PDIS-03-12-0262-PDN

8. First Report of Gliocephalotrichum bulbilium and G. simplex Causing Fruit Rot of Rambutan in Puerto Rico

Author:
Serrato-Diaz, L. M.; Latoni-Brailowsky, E. I.; Rivera-Vargas, L. I.; Goenaga, R.; French-Monar, R. D.
Source:
Plant disease 2012 v.96 no.8 pp. 1225
ISSN:
0191-2917
Subject:
Agricultural Research Service; Nephelium lappaceum; agar; appendages; aril; chlamydospores; color; conidia; conidiophores; corn meal; fluorescent lighting; fruits; genes; genetic databases; internal transcribed spacers; mycelium; pathogenicity; pathogens; plant rots; plant tissues; polymerase chain reaction; postharvest diseases; rambutans; ribosomal DNA; sequence analysis; species identification; taxonomic keys; trees; tropical agriculture; tubulin; Hawaii; Puerto Rico; Sri Lanka; Thailand
Abstract:
... Post-harvest disease losses of rambutan (Nephelium lappaceum L.) have been reported worldwide and several pathogens have been associated with fruit rot (3,4). In 2011, fruit rot of rambutan was observed on 11-year-old trees at the USDA-ARS Tropical Agriculture Research Station in Mayaguez, Puerto Rico. Infected fruit sections (1 mm²) were surface-sterilized, rinsed with sterile deionized-distilled ...
DOI:
10.1094/PDIS-01-12-0101-PDN

9. First Report of Hyphodermella rosae Causing Dry Fruit Rot Disease on Plum in Iran

Author:
Sayari, M.; Babaeizad, V.; Ghanbari, M. A. T.; Rahimian, H.; Borhani, B.; Mohammadi, M. M.; Nasiri, J. S.
Source:
Plant disease 2012 v.96 no.8 pp. 1228
ISSN:
0191-2917
Subject:
Citrus; DNA primers; Prunus cerasus; Prunus domestica; agar; apricots; basidiomata; basidiospores; cell walls; chlorine; fruits; fungi; hyphae; mycelium; orchards; pathogenicity; peaches; plant rots; plums; polymerase chain reaction; relative humidity; ribosomal DNA; sequence homology; streptomycin; sulfates; temperature; wood; Iran
Abstract:
... Plum (Prunus domestica) and peach (P. persica) are widely grown, often in alternate rows with citrus, in the Mazandaran Province of Iran. In June 2011, a dry fruit rot of plum was observed in several production regions in Mazandaran Province (35°47′N, 50°34′E). Initial symptoms at pit-hardening stage appeared as dark brown, circular, necrotic spots from 2 to 5 cm in diameter. They later developed ...
DOI:
10.1094/PDIS-05-12-0420-PDN

10. First Report of Phytophthora cryptogea on Potato Tubers in Turkey

Author:
Çakır, E.; Demirci, F.
Source:
Plant disease 2012 v.96 no.8 pp. 1224
ISSN:
0191-2917
Subject:
sodium hypochlorite; Solanum tuberosum; tubers; potatoes; Phytophthora cryptogea; texture; sporangia; ribosomal DNA; oogonia; ambient temperature; internal transcribed spacers; fluorescent lighting; agar; carrots; mycelium; pathogens; corn meal; cultivars; sequence analysis; soil; pathogenicity; genetic databases; color; fungi; Turkey (country)
Abstract:
... Potato (Solanum tuberosum L.) is an important agricultural crop in Turkey, with 150,000 ha and a production of about 4 million tons per year. There are numerous pathogens that limit potato production. In 2011, a new disease was observed on the potato cultivar Ramos in Erzincan Province in Turkey. Disease symptoms were similar to pink rot. Infected tubers had a rubbery texture and when cut, infecte ...
DOI:
10.1094/PDIS-01-12-0009-PDN

11. First Report of Pseudomonas viridiflava Causing a Bacterial Blight of Artichoke Bract Leaves

Author:
Sarris, P. F.; Trantas, E. A.; Mpalantinaki, E.; Ververidis, F. N.; Gouma, S. E.; Goumas, D. E.
Source:
Plant disease 2012 v.96 no.8 pp. 1223
ISSN:
0191-2917
Subject:
Chrysanthemum indicum; Cynara cardunculus subsp. cardunculus; Pseudomonas viridiflava; agar; arginine deiminase; artichokes; blight; bracts; dipping; eggplants; fluorescence; genes; genetic databases; hypersensitive response; lactic acid; leaves; levan; microbial culture; multilocus sequence typing; necrosis; nucleotide sequences; pathogenicity; phylogeny; pith; potatoes; relative humidity; stems; sucrose; tobacco; tomatoes; trigonelline; wilting; Crete; Greece
Abstract:
... In 2006, a disease was observed on two artichoke (Cynara scolymus L. cv. Lardati) fields in Crete, Greece, covering ~2 ha. Symptoms developed after several days of rainy and windy weather and >70% of capitula were affected, resulting in unmarketable produce. Initial symptoms were water-soaked, dark green spots on bracts with many sunken, necrotic, often elongated lesions, each with a brown-black c ...
DOI:
10.1094/PDIS-12-11-1056-PDN

12. First Report of Raspberry leaf blotch virus in Raspberries in Finland

Author:
Bi, Y.; Artola, K.; Kurokura, T.; Hytönen, T.; Valkonen, J. P. T.
Source:
Plant disease 2012 v.96 no.8 pp. 1231
ISSN:
0191-2917
Subject:
Phyllocoptes gracilis; RNA probes; Raspberry leaf blotch virus; Rubus idaeus; Sorbus aucuparia; abnormal development; amino acids; antisense RNA; buds; cetyltrimethylammonium bromide; complementary DNA; etiology; farms; genes; genetic databases; high-throughput nucleotide sequencing; leaf blotch; leaf development; leaves; mites; nucleocapsid; plant growth; plant pathology; planting; polymerase chain reaction; raspberries; sequence homology; trichomes; virion; virology; viruses; Finland; Serbia; United Kingdom
Abstract:
... Raspberry (Rubus idaeus L.) is a valuable and widely grown softfruit that is a host for 40 viruses and virus-like agents, of which many are not characterized at the molecular level. Recently, Raspberry leaf blotch virus (RLBV, putative emaravirus species) was described from raspberries (cv. Glen Ample) in the United Kingdom and Serbia. Plants displayed conspicuous yellow blotches on leaves and abn ...
DOI:
10.1094/PDIS-04-12-0365-PDN

13. First Report of Rice yellow mottle virus on Rice in Burundi

Author:
Ndikumana, I.; Pinel-Galzi, A.; Negussie, Z.; Msolla, S. N'chimbi; Njau, P.; Singh, R. K.; Choi, I. R.; Bigirimana, J.; Fargette, D.; Hébrard, E.
Source:
Plant disease 2012 v.96 no.8 pp. 1230
ISSN:
0191-2917
Subject:
Oryza sativa; RNA; Rice yellow mottle virus; altitude; coat proteins; cultivars; disease incidence; genes; genetic databases; growth retardation; lakes; leaves; pathogens; pest management; phylogeny; phylogeography; polyclonal antibodies; reverse transcriptase polymerase chain reaction; rice; surveys; tillering; Burundi; Germany; Kenya; Lake Victoria; Malawi; Rwanda; Tanzania; Uganda
Abstract:
... Since the mid-1980s, rice cultivation has expanded rapidly in Burundi to reach approximately 50,000 ha in 2011. In 2007, leaf mottling, reduced tillering, and stunting symptoms were observed on rice at Gatumba near Bujumbura, causing small patches in less than 10% of the fields. Rice yellow mottle virus (RYMV, genus Sobemovirus), which has seriously threatened rice cultivation in Africa (1) and wa ...
DOI:
10.1094/PDIS-03-12-0265-PDN

14. First Report of Tomato yellow leaf curl virus Infecting Common Bean in China

Author:
Ji, Y. H.; Cai, Z. D.; Zhou, X. W.; Liu, Y. M.; Xiong, R. Y.; Zhao, T. M.; Yu, W. G.; Tao, X. R.; Zhou, Y. J.
Source:
Plant disease 2012 v.96 no.8 pp. 1229
ISSN:
0191-2917
Subject:
Bemisia tabaci; DNA fragmentation; Phaseolus vulgaris; Tomato yellow leaf curl China virus; Tomato yellow leaf curl virus; cowpeas; genes; growth retardation; intergenic DNA; leaves; monoclonal antibodies; nucleotide sequences; nucleotides; pathogens; polymerase chain reaction; sequence alignment; tomatoes; vegetable crops; viruses; China; Spain
Abstract:
... Common bean (Phaseolus vulgaris) is one of the most economically important vegetable crops in China. In November 2011, symptoms with thickening and crumpling of leaves and stunting were observed on common bean with incidence rate of 50 to 70% in the fields of Huaibei, northern Anhui Province, China. Diseased common bean plants were found to be infested with large population of whiteflies (Bemisia ...
DOI:
10.1094/PDIS-02-12-0196-PDN

15. First Report of Zonate Leaf Spot of Cinnamomum kanehirae Caused by Hinomyces moricola in Taiwan

Author:
Fu, C. H.; Lin, F. Y.
Source:
Plant disease 2012 v.96 no.8 pp. 1226
ISSN:
0191-2917
Subject:
Cinnamomum; agar; annuals; branches; defoliation; gardens; growth chambers; hosts; leaf blight; leaf spot; leaves; medicinal fungi; pathogenicity; pathogens; plastic bags; sclerotia; trees; winter; zonate leaf spot; Eastern United States; Japan; Taiwan
Abstract:
... Cinnamomum kanehirae, a native tree of Taiwan, is an important tree that hosts popular medicinal fungi. In the winter of 2011, zonate leaf spots were observed at a nursery garden in Wu-Lai, Taiwan. Initial symptoms included small brown lesions on leaves that became larger leaf spots after expanding or fusing together, causing a leaf blight and eventually defoliation. Sporophores on the host were g ...
DOI:
10.1094/PDIS-03-12-0223-PDN

16. Geographical Distribution and Survival of Iris yellow spot virus in Spiny Sowthistle, Sonchus asper, in Georgia

Author:
Nischwitz, C.; Srinivasan, R.; Sundaraj, S.; Mullis, S. W.; McInnes, B.; Gitaitis, R. D.
Source:
Plant disease 2012 v.96 no.8 pp. 1165-1171
ISSN:
0191-2917
Subject:
geographical distribution; Iris yellow spot tospovirus; reproduction; epidemiology; Sonchus asper; reverse transcriptase polymerase chain reaction; surveys; spring; enzyme-linked immunosorbent assay; inoculum; onions; weeds; Thrips tabaci; Georgia
Abstract:
... Iris yellow spot virus (IYSV) has occurred in Georgia since 2003. IYSV is transmitted by onion thrips, Thrips tabaci. During a weed survey in the Vidalia onion-growing zone (VOZ), spiny sowthistle (Sonchus asper) was identified as a host for IYSV. Spiny sowthistle is widespread in Georgia, and this presented an opportunity to study the natural spread of IYSV and assess its potential role in IYSV e ...
DOI:
10.1094/PDIS-09-11-0747-RE

17. Geographic Distribution of Trichothecene Chemotypes of the Fusarium graminearum Species Complex in Major Winter Wheat Production Areas of China

Author:
Shen, Cheng-mei; Hu, Ying-chun; Sun, Hai-yan; Li, Wei; Guo, Jian-hua; Chen, Huai-gu
Source:
Plant disease 2012 v.96 no.8 pp. 1172-1178
ISSN:
0191-2917
Subject:
15-acetyldeoxynivalenol; 3-acetyldeoxynivalenol; Fusarium graminearum; Fusarium head blight; chemotypes; crop production; crop rotation; deoxynivalenol; geographical distribution; grain crops; nivalenol; phylogeny; polymerase chain reaction; temperature; virulence; watersheds; winter wheat; China; Yangtze River
Abstract:
... Fusarium head blight, caused by members of the Fusarium graminearum species complex (FGSC), is among the most destructive and economically important diseases of small grain crops, including wheat. To determine the phylogenetic species and mycotoxin (trichothecene) chemotypes of the FGSC in the major winter-wheat-producing areas of China, 530 isolates were collected from diseased wheat during the y ...
DOI:
10.1094/PDIS-11-11-0974-RE

18. Identification and Detection of Phytophthora: Reviewing Our Progress, Identifying Our Needs

Author:
Martin, Frank N.; Abad, Z. Gloria; Balci, Yilmaz; Ivors, Kelly
Source:
Plant disease 2012 v.96 no.8 pp. 1080-1103
ISSN:
0191-2917
Subject:
Phytophthora; databases; economic impact; ecosystems; forest decline; forests; genome; invasive species; new species; phylogeny; streams; surveys
Abstract:
... With the increased attention given to the genus Phytophthora in the last decade in response to the ecological and economic impact of several invasive species (such as P. ramorum, P. kernoviae, and P. alni), there has been a significant increase in the number of described species. In part, this is due to the extensive surveys in historically underexplored ecosystems (e.g., forest and stream ecosyst ...
DOI:
10.1094/PDIS-12-11-1036-FE

19. Impact of Seed Lot Infection on the Development of Black Dot and Verticillium Wilt of Potato in Washington

Author:
Dung, Jeremiah K. S.; Ingram, Jason T.; Cummings, Thomas F.; Johnson, Dennis A.
Source:
Plant disease 2012 v.96 no.8 pp. 1179-1184
ISSN:
0191-2917
Subject:
Colletotrichum coccodes; Verticillium dahliae; Verticillium wilt; canopy; disease severity; foliar diseases; fungi; inoculum; necrosis; pathogens; potatoes; progeny; seed tubers; soil; Washington (state)
Abstract:
... The fungi Colletotrichum coccodes and Verticillium dahliae are two pathogens of potato which are prevalent in potato field soils and seed tubers. The objective of this study was to investigate the influence of seed lot infection by C. coccodes and V. dahliae on disease severity and yield using infested seed lots and fields with and without potato in their recent cropping histories. Greater inciden ...
DOI:
10.1094/PDIS-01-12-0061-RE

20. Inhibitory Effects of Chinese Medicinal Herbs on Plant-Pathogenic Bacteria and Identification of the Active Components from Gallnuts of Chinese Sumac

Author:
Feng, C. T.; Su, H. J.; Chen, C. T.; Ho, W. C.; Tsou, Y. R.; Chern, L. L.
Source:
Plant disease 2012 v.96 no.8 pp. 1193-1197
ISSN:
0191-2917
Subject:
Acidovorax avenae subsp. citrulli; Ralstonia solanacearum; Xanthomonas; antibacterial properties; bacteria; gallic acid; growth retardation; medicinal plants; microbial growth; minimum inhibitory concentration; nuclear magnetic resonance spectroscopy; silica
Abstract:
... The aqueous extracts of 30 out of 67 Chinese medicinal herbs were shown to have inhibitory effects on growth of Xanthomonas euvesicatoria by a paper disc diffusion assay. The inhibitory substances with the strongest antibacterial activity were extracted from Chinese sumac gallnut and black myrobalan. The aqueous extract of gallnut inhibited the growth of eight of the tested plant-pathogenic bacter ...
DOI:
10.1094/PDIS-08-11-0673-RE