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1. A Review of a Century of Studies on South American Leaf Blight of the Rubber Tree

Author:
Guyot, Jean; Le Guen, Vincent
Source:
Plant disease 2018 v.102 no.6 pp. 1052-1065
ISSN:
0191-2917
Subject:
Hevea brasiliensis; leaf blight; microbiological risk assessment; plantations; rubber; Africa; Asia; South America
Abstract:
... In the past, South American leaf blight (SALB) of the rubber tree has been responsible for very severe damage in rubber plantations in South America. It is still the main obstacle holding back the development of rubber cultivation on the American continent and is a major risk for Asia and Africa, which are still exempt from this scourge. However, knowledge about the disease and about rubber tree r ...
DOI:
10.1094/PDIS-04-17-0592-FE

2. Assessing Potato Cultivar Sensitivity to Tuber Necrosis Caused by Potato mop-top virus

Author:
Yellareddygari, S. K. R.; Whitworth, Jonathan L.; Gudmestad, Neil C.
Source:
Plant disease 2018 v.102 no.6 pp. 1148-1153
ISSN:
0191-2917
Subject:
Potato mop-top virus; Tuber (Tuberaceae); cultivars; disease control; financial economics; necrosis; potatoes; storage conditions; tubers; viruses; North Dakota
Abstract:
... Potato mop-top virus (PMTV) causes mop top disease in potato. This disease can result in a decline in tuber quality causing economic losses to growers due to the production of necrotic lesions and discolored tissue in infected tubers. Due to the soilborne nature of PMTV, identifying and developing host resistance against the virus is considered the best disease management option. Very little is kn ...
DOI:
10.1094/PDIS-10-17-1585-RE

3. Benefits and Profitability of Fluopyram-Amended Seed Treatments for Suppressing Sudden Death Syndrome and Protecting Soybean Yield: A Meta-Analysis

Author:
Kandel, Yuba R.; McCarville, Michael T.; Adee, Eric A.; Bond, Jason P.; Chilvers, Martin I.; Conley, Shawn P.; Giesler, Loren J.; Kelly, Heather M.; Malvick, Dean K.; Mathew, Febina M.; Rupe, John C.; Sweets, Laura E.; Tenuta, Albert U.; Wise, Kiersten A.; Mueller, Daren S.
Source:
Plant disease 2018 v.102 no.6 pp. 1093-1100
ISSN:
0191-2917
Subject:
Glycine max; crop yield; cultivars; death; disease severity; field experimentation; foliar diseases; meta-analysis; prices; probability; profitability; seed treatment; sowing date; Ontario; United States
Abstract:
... A meta-analytic approach was used to summarize data on the effects of fluopyram-amended seed treatment on sudden death syndrome (SDS) and yield of soybean (Glycine max L.) in over 200 field trials conducted in 12 U.S. states and Ontario, Canada from 2013 to 2015. In those trials, two treatments—the commercial base (CB), and CB plus fluopyram (CBF)—were tested, and all disease and yield data were c ...
DOI:
10.1094/PDIS-10-17-1540-RE

4. Characterization of the Black Shank Pathogen, Phytophthora nicotianae, Across North Carolina Tobacco Production Areas

Author:
Gallup, Courtney A.; McCorkle, Kestrel L.; Ivors, Kelly L.; Shew, David
Source:
Plant disease 2018 v.102 no.6 pp. 1108-1114
ISSN:
0191-2917
Subject:
Phytophthora nicotianae; black shank disease; genetic recombination; genetic variation; hyphae; mating types; mefenoxam; oospores; pathogens; races; resistance genes; sporulation; surveys; tobacco; North Carolina
Abstract:
... Black shank disease of tobacco, caused by the oomycete Phytophthora nicotianae, is a major threat to production in the United States and tobacco-producing areas worldwide. In a statewide survey of North Carolina, the rapid shift from race 0 to race 1 was documented. Collected pathogen isolates were characterized phenotypically for mating type and mefenoxam sensitivity, and genotypically by compari ...
DOI:
10.1094/PDIS-02-17-0295-RE

5. Differences in Molecular Characteristics of Segment 8 in Rice black-streaked dwarf virus and Southern rice black-streaked dwarf virus

Author:
Zhou, Yu; Zhang, Xiaoming; Wang, Dandan; Weng, Jianfeng; Di, Hong; Zhang, Lin; Dong, Ling; Zhang, Hong; Zu, Hongyue; Li, Xinhai; Wang, Zhenhua
Source:
Plant disease 2018 v.102 no.6 pp. 1115-1123
ISSN:
0191-2917
Subject:
National Center for Biotechnology Information; Rice black streaked dwarf virus; Southern rice black-streaked dwarf virus; codons; corn; correspondence analysis; effective population size; gene flow; genetic variation; pathogens; phylogeny; rice; river valleys; sequence deletion; viruses; China
Abstract:
... Rice black-streaked dwarf virus (RBSDV) and Southern rice black-streaked dwarf virus (SRBSDV) cause maize rough dwarf disease (MRDD) and rice black-streaked dwarf disease (RBSDD) in China. RBSDV segment 8 (S8) contains the only deletion mutation in the genomes of these viruses, which are both members of the genus Fijivirus. To illuminate the molecular differences between the RBSDV and SRBSDV genom ...
DOI:
10.1094/PDIS-10-17-1652-RE

6. Effect of Fusarium Head Blight Management Practices on Mycotoxin Contamination of Wheat Straw

Author:
Bissonnette, Kaitlyn M.; Kolb, Frederic L.; Ames, Keith A.; Bradley, Carl A.
Source:
Plant disease 2018 v.102 no.6 pp. 1141-1147
ISSN:
0191-2917
Subject:
15-acetyldeoxynivalenol; 3-acetyldeoxynivalenol; Fusarium; Fusarium head blight; cultivars; demethylation; deoxynivalenol; disease control; fungicides; quinones; wheat; wheat straw
Abstract:
... Management of Fusarium graminearum-associated mycotoxins in wheat grain has been extensively evaluated, but little is known about management of mycotoxins in straw. Two research trials were conducted at four locations from 2011 to 2014. The objective of the first trial was to determine the efficacy of fungicides, and the objective of the second trial was to evaluate the use of integrated disease m ...
DOI:
10.1094/PDIS-09-17-1385-RE

7. First Report of a Cilevirus Associated with Green Ringspot on Senescent Hibiscus Leaves in Tampa, Florida

Author:
Roy, A.; Stone, A. L.; Melzer, M. J.; Hartung, J. S.; Mavrodieva, V. A.; Nakhla, M. K.; Schneider, W. L.; Brlansky, R. H.
Source:
Plant disease 2018 v.102 no.6 pp. 1181
ISSN:
0191-2917
Subject:
Brevipalpus; Cilevirus; Citrus; Hibiscus rosa-sinensis; RNA; RNA libraries; RNA-directed RNA polymerase; amino acids; coat proteins; genes; high-throughput nucleotide sequencing; leaves; molecular cloning; nucleotide sequences; phylogeny; reverse transcriptase polymerase chain reaction; reverse transcription; viruses; Colombia; Florida; Hawaii
Abstract:
... A nonsystemic cilevirus producing green ringspot symptoms in ornamental hibiscus (Hibiscus rosa-sinensis) was first reported from Hawaii in 2013 and was named Hibiscus-infecting cilevirus (HiCV) (Melzer et al. 2013). The false spider mite Brevipalpus yothersi is associated with symptomatic hibiscus, but its role as a vector of HiCV has not yet been demonstrated. Positive-sense bipartite HiCV genom ...
DOI:
10.1094/PDIS-11-17-1699-PDN

8. First Report of Alternaria Leaf Spot Caused by Alternaria chlamydosporigena on Tomato in Iran

Author:
Sadeghi, B.; Mirzaei, S.
Source:
Plant disease 2018 v.102 no.6 pp. 1175
ISSN:
0191-2917
Subject:
Alternaria; DNA; DNA-directed RNA polymerase; Embellisia; Solanum lycopersicum; agar; air drying; allergens; carrots; chlamydospores; color; conidia; conidiophores; cultivars; culture media; disease control; disease incidence; fungi; genes; glyceraldehyde-3-phosphate dehydrogenase; greenhouses; internal transcribed spacers; leaf spot; leaves; mycelium; pathogenicity; pathogens; peptide elongation factors; polymerase chain reaction; potatoes; sequence analysis; sodium hypochlorite; sporulation; summer; tomatoes; translation (genetics); Iran
Abstract:
... Tomato (Solanum lycopersicum L.) is one of the most important crops in Iran and the world. Tomatoes are cultivated in many parts of Iran, including Kerman (in the southeast of Iran; 30°17′38″ N, 57°05′03″ E). Kerman is a significant area for production of horticultural products. In summer 2016, symptoms of leaf spot were observed in commercial tomato fields with over 50% disease incidence in Sirch ...
DOI:
10.1094/PDIS-09-17-1420-PDN

9. First Report of Anthracnose Caused by Colletotrichum higginsianum on Rumex acetosa in China

Author:
Zhang, Y. W.; Xue, L. H.; Li, C. J.
Source:
Plant disease 2018 v.102 no.6 pp. 1174
ISSN:
0191-2917
Subject:
Colletotrichum higginsianum; DNA primers; Rumex acetosa; Rumex crispus; actin; agar; air drying; anthracnose; bleaching agents; chitin synthase; conidia; culture media; diarrhea; ethanol; fungi; genes; glyceraldehyde-3-phosphate dehydrogenase; growth chambers; histones; internal transcribed spacers; paper; pathogenicity; petioles; photoperiod; planting; plastic film; polymerase chain reaction; relative humidity; ribosomal DNA; sodium hypochlorite; sporulation; temperate zones; tissues; trays; tubulin; China
Abstract:
... Rumex acetosa (family Polygonaceae) is a perennial herb widely distributed in temperate climates. The foliage has traditionally been used as a treatment for skin irritations and diarrhea (Sun et al. 2015). In December 2015, lesions on R. acetosa were observed in Xinjin County, Sichuan Province, China (30.47785° N, 103.75878° W), with approximately 88% of the leaves affected in a 500 m² planting of ...
DOI:
10.1094/PDIS-07-17-1082-PDN

10. First Report of Blue Mold Caused by Penicillium oxalicum in Sweetpotato (Ipomoea batatas) in Korea

Author:
Paul, N. C.; Nam, S.-S.; Yang, J.-W.; Kachroo, A.
Source:
Plant disease 2018 v.102 no.6 pp. 1176
ISSN:
0191-2917
Subject:
DNA; Ipomoea batatas; Penicillium oxalicum; conidia; conidiophores; culture media; energy crops; fungal growth; genes; hyphae; internal transcribed spacers; isolation techniques; loci; molds (fungi); pathogen identification; pigmentation; polymerase chain reaction; relative humidity; research institutions; roots; sequence analysis; sporulation; storage temperature; sweet potatoes; tubulin; South Korea
Abstract:
... Many fungal diseases can affect sweetpotato (Ipomoea batatas [L.] Lam), a dicotyledonous plant in the Convolvulaceae family, at various stages from cultivation through storage (Clark et al. 2013). We observed blue mold disease on sweetpotato storage roots in the store house at the Bioenergy Crop Research Institute, Muan, South Korea, in 2016. The storage temperature and relative humidity were 13°C ...
DOI:
10.1094/PDIS-09-17-1421-PDN

11. First Report of Chilli veinal mottle virus Infecting Solanum aethiopicum in China

Author:
Li, Y. Y.; Ma, Y.; Meng, Y.; Huang, M. Z.; Ren, G. M.; Zhao, J. F.; Li, F.
Source:
Plant disease 2018 v.102 no.6 pp. 1181
ISSN:
0191-2917
Subject:
plant viruses; Tobamovirus; Capsicum chinense; cetyltrimethylammonium bromide; genes; Solanum aethiopicum; tomatoes; eggplants; plant diseases and disorders; DNA; reverse transcription; viruses; Tomato spotted wilt orthotospovirus; leaves; coat proteins; sequence analysis; oligodeoxyribonucleotides; Polerovirus; reverse transcriptase polymerase chain reaction; Potyvirus; nucleotide sequences; ribonucleases; Cucumber mosaic virus; Tanzania; Italy; China
Abstract:
... Solanum aethiopicum, commonly known as Ethiopian eggplant, scarlet eggplant, or bitter eggplant, is a species of genus Solanum, which is cultivated as a kind of vegetable in most African countries and some regions of Yunnan Province of southwest China. In July 2016, mottle, mosaic, and blistering symptoms were observed on leaves of S. aethiopicum plants in two fields in Mangshi city of Yunnan, Chi ...
DOI:
10.1094/PDIS-09-17-1351-PDN

12. First Report of Colletotrichum gloeosporioides Causing Anthracnose Spot on Cassia fistula in Brazil

Author:
Rabuske, J. E.; Muniz, M. F. B.; Poletto, T.; Walker, C.; Blume, E.; Krahn, J. R. T.; Brun, T.; Harakava, R.
Source:
Plant disease 2018 v.102 no.6 pp. 1172
ISSN:
0191-2917
Subject:
Camellia japonica; Cassia fistula; Colletotrichum; DNA; Eugenia dysenterica; Glomerella cingulata; Syagrus; anamorphs; anthracnose; cities; color; conidia; control methods; culture media; disease control; ethanol; flowering; fungi; gardens; humidity; internal transcribed spacers; introduced species; leaf spot; leaves; mycelium; ornamental value; paper; parks; pathogenicity; pathogens; peptide elongation factors; perithecia; photoperiod; sodium hypochlorite; spring; summer; teleomorphs; trees; tubulin; urban areas; Brazil
Abstract:
... Cassia fistula L. (Fabaceae) is an exotic species in Brazil and is widely used for ornamental purposes for its exuberant yellow-gold flowering, thus being present in parks and gardens of several cities in Rio Grande do Sul (RS) state. Since January 2015, a new leaf spot has been observed in several counties of RS. The first symptoms of disease onset in early spring become aggravated in summer, cau ...
DOI:
10.1094/PDIS-10-17-1592-PDN

13. First Report of Colletotrichum truncatum Causing Anthracnose of Begonia in China

Author:
Zhai, Y. X.; Zhang, B. Q.; Cao, H.; Hao, X. J.
Source:
Plant disease 2018 v.102 no.6 pp. 1177
ISSN:
0191-2917
Subject:
Begonia; Colletotrichum truncatum; Fabaceae; anthracnose; conidia; container-grown plants; culture media; cytoplasm; death; financial economics; glyceraldehyde-3-phosphate dehydrogenase; greenhouses; horticulture; host range; internal transcribed spacers; leaves; mycelium; ornamental plants; pathogenicity; photoperiod; plant pathology; runoff; sequence analysis; spraying; stems; trade; tubulin; China
Abstract:
... The begonia (Begonia × semperflorens) is one of the most important ornamental plants in the horticultural trade and is cultivated widely as a potted plant in China. In March 2017, we received diseased begonia plants from a greenhouse in Taigu (37°30′32.82″N, 112°38′4.55″E), Shanxi province of China. Anthracnose symptoms including large, sunken, brown lesions with numerous black acervuli were obser ...
DOI:
10.1094/PDIS-10-17-1520-PDN

14. First Report of Cucumber mosaic virus Infection in Kiwifruit (Actinidia chinensis) in China

Author:
Wang, D.; Liu, X. X.; Li, T. T.; Li, Q.; Liu, Y.; Gong, G. S.; Yang, H.
Source:
Plant disease 2018 v.102 no.6 pp. 1180
ISSN:
0191-2917
Subject:
Actinidia chinensis; Cucumber mosaic virus; Nicotiana glutinosa; RNA; coat proteins; complementary DNA; crops; cultivars; deformation; disease incidence; genes; hybridization probes; kiwifruit; leaves; nucleotide sequences; oligodeoxyribonucleotides; ornamental plants; pH; phylogeny; plant diseases and disorders; plant viruses; reverse transcriptase polymerase chain reaction; sequence alignment; sodium phosphate; statistical analysis; viruses; China; Italy; New Zealand; United States
Abstract:
... Cucumber mosaic virus (CMV, genus Cucumovirus, family Bromoviridae) is a major pathogen of a wide number of agricultural and ornamental crops. The virus was first described in the United States in 1916, and because of the damage it causes on some economically important crops, it was included in the “top 10 plant viruses” (Scholthof et al. 2011). International kiwifruit production is concentrated i ...
DOI:
10.1094/PDIS-06-17-0824-PDN

15. First Report of Drechslera andersenii Causing Leaf Spot on Perennial Ryegrass in Jiangsu China

Author:
Hu, J.; Yang, J. Y.; Li, J.; Gao, T.; Yang, G. W.; Ren, H. Y.
Source:
Plant disease 2018 v.102 no.6 pp. 1174
ISSN:
0191-2917
Subject:
DNA; DNA primers; Drechslera; Lolium perenne; agar; air drying; autoclaving; conidia; cool season grasses; culture media; fungi; glyceraldehyde-3-phosphate dehydrogenase; growth chambers; hyphae; internal transcribed spacers; lawns and turf; leaf spot; leaves; mycelium; plastic bags; polymerase chain reaction; relative humidity; sequence analysis; sodium hypochlorite; solar radiation; streptomycin; sulfates; tetracycline; tissues; China
Abstract:
... Perennial ryegrass (Lolium perenne L.) is a cool-season grass that is widely used for overseeding in the transitional zones of China. In June 2017, extensive leaf spots were observed on perennial ryegrass at the campus of Nanjing Agricultural University in Jiangsu province. Lesions were initially 2 to 3 cm in length and 1 to 3 mm in width. As the disease progressed, they expanded and became more n ...
DOI:
10.1094/PDIS-07-17-1085-PDN

16. First Report of Fusarium fujikuroi Causing Stem Wilt on Canna edulis Ker in China

Author:
Jiang, S. B.; Lin, B. R.; Shen, H. F.; Yang, Q. Y.; Zhang, J. X.; Sun, D. Y.; Pu, X. M.
Source:
Plant disease 2018 v.102 no.6 pp. 1177
ISSN:
0191-2917
Subject:
Canna indica; Fusarium fujikuroi; Hylocereus polyrhizus; calmodulin; conidia; culture media; disease control; ethanol; fungi; genes; greenhouses; growth retardation; histones; leaves; microscopy; mitochondria; mycelium; pathogenicity; pathogens; phylogeny; polymerase chain reaction; relative humidity; sodium hypochlorite; stem rot; stems; tissues; tubulin; China; Malaysia
Abstract:
... Canna lily (Canna edulis Ker.) is an important economic crop in China with a production area of more than 40,000 ha. In June 2017, C. edlis ‘Xingyu-1’ in Wuhua, Guangdong, China, developed stunting, chlorotic stems with spots, and wilted leaves and ultimately died. White mycelium appeared on the stems during wet conditions. Affected plants were scattered throughout the field, with an overall incid ...
DOI:
10.1094/PDIS-09-17-1479-PDN

17. First Report of Gilbertella persicaria Causing Soft Rot in Eggplant Fruit in Brazil

Author:
Vieira, J. C. B.; Câmara, M. P. S.; Bezerra, J. D. P.; Motta, C. M. S.; Machado, A. R.
Source:
Plant disease 2018 v.102 no.6 pp. 1172
ISSN:
0191-2917
Subject:
Bayesian theory; Gilbertella persicaria; Hylocereus; Solanum melongena; cotton; culture media; disease control; eggplants; feces; fruits; fungi; hyphae; internal transcribed spacers; microscopy; mycelium; pathogens; peaches; phylogeny; plums; probability; ribosomal DNA; soil; sporangia; spores; Brazil
Abstract:
... In March 2017, two eggplant fruit (Solanum melongena cv. Ciça) were collected from field production in Chã-Grande, in the state of Pernambuco, Brazil, with circular, light brown and slightly sunken lesions in the apex, extending to the entire fruit in 3 to 4 days and developing a soft rot with abundant mycelial and sporangia production on the surface. After microscopic examination, a fungus belong ...
DOI:
10.1094/PDIS-09-17-1379-PDN

18. First Report of Leaf Blight Caused by Curvularia verruculosa on Zoysiagrass (Zoysia japonica) in Korea

Author:
Choi, Y. J.; Lee, J. S.; Lee, H. B.; Kim, H. J.
Source:
Plant disease 2018 v.102 no.6 pp. 1173
ISSN:
0191-2917
Subject:
Curvularia; Zoysia japonica; agar; conidia; conidiophores; corn meal; culture media; dieback; disease surveys; fungi; genes; glyceraldehyde-3-phosphate dehydrogenase; golf courses; growth chambers; host plants; internal transcribed spacers; leaf spot; leaves; mycelium; necrosis; pathogenicity; pathogens; phylogeny; plant growth; polymerase chain reaction; public parks; quarantine; relative humidity; ribosomal DNA; sequence analysis; spraying; streptomycin; turf grasses; China; Japan; Korean Peninsula; United States; Venezuela
Abstract:
... Zoysia japonica Steud. is widely used for turfgrass, particularly on golf courses and teeing areas in East Asia (China, Japan, and Korea). In Korea, zoysiagrass use increased about threefold between 2003 and 2012 (Kang et al. 2016). In October 2016, zoysiagrass showing leaf spot symptoms, with disease incidence of less than 5% of the plants, was observed in a public park (37°20′39″N, 126°56′50″E) ...
DOI:
10.1094/PDIS-09-17-1402-PDN

19. First Report of Leaf Rust on Southern Highbush Blueberry caused by Thekopsora minima in California

Author:
Shands, A. C.; Crandall, S. G.; Ho, T.; Miles, T. D.
Source:
Plant disease 2018 v.102 no.6 pp. 1171
ISSN:
0191-2917
Subject:
Rubus; Tsuga; Vaccinium corymbosum; blueberries; coasts; color; cultivars; epidemiology; field experimentation; fungi; hosts; leaf rust; leaves; light microscopes; loci; pathogen identification; pathogens; ribosomal DNA; species identification; storage temperature; urediniospores; winter; Australia; California
Abstract:
... Leaf rust symptoms have been intermittently observed on southern highbush blueberry (Vaccinium corymbosum L. × V. darrowii Camp) in California. Rust symptoms were first seen in 2010 near Carpinteria, CA (M. Kong, personal communication) and then in July 2016 on leaves of three blueberry cultivars Emerald, Jewel, and Snow Chaser in a field trial in Watsonville. In early 2017, leaf rust was observed ...
DOI:
10.1094/PDIS-09-17-1439-PDN

20. First Report of Leaf Spot Caused by Truncatella angustata on Persian Oak (Quercus brantii) in Iran

Author:
Alidadi, A.; Kowsari, M.; Javan-Nikkhah, M.; Karami, S.
Source:
Plant disease 2018 v.102 no.6 pp. 1173
ISSN:
0191-2917
Subject:
DNA primers; Quercus brantii; Rosa canina; Truncatella; agar; appendages; apples; bags; cleaning; conidia; conidiophores; culture media; forests; fungi; greenhouses; host range; hosts; hyphae; internal transcribed spacers; leaf spot; leaves; mountains; olives; pathogenicity; plant pathogens; plant rots; polyethylene; postharvest diseases; screening; seedlings; summer; trees; Iran
Abstract:
... Production of Persian oak (Quercus brantii Lindl.) seedlings in nurseries and their transplantation into lands destined to forest is a strategy for restoration of damaged areas in Ilam Province, Iran. Forests in Ilam are part of the Zagros Mountains (one of the most important forest regions in western Iran), which has 641,000 ha of forest (Ahmadi et al. 2014). The main tree species in these forest ...
DOI:
10.1094/PDIS-08-17-1258-PDN