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You searched for: Journal Plant disease Remove constraint Journal: Plant disease Publication Year 2020 Remove constraint Publication Year: 2020 Source 2020 v.104 no.2 Remove constraint Source: 2020 v.104 no.2
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1. Alternaria tenuissima Causing Fruit Scab Disease on Actinidia chinensis in Anhui Province, China

Author:
Ma, Ji; Li, Hongxia; Wang, Xingyu; Guo, Min
Source:
Plant disease 2020 v.104 no.2 pp. 569
ISSN:
0191-2917
Subject:
Actinidia chinensis; Alternaria alternata; Alternaria tenuissima; DNA primers; color; conidia; conidiophores; cultivars; culture media; databases; ethanol; fruits; fungi; genes; gooseberries; histones; humidity; internal transcribed spacers; kiwifruit; leaf spot; mountains; mycelium; pathogen identification; pathogenicity; pathogens; polymerase chain reaction; ribosomal DNA; surveys; China
Abstract:
... Chinese gooseberry (Actinidia chinensis Planch) is an economically and nutritionally important fruit widely cultivated in mountainous areas of Anhui, Zhejiang, Fujian, Hubei, Hunan, Sichuan, Guizhou, and Shanxi Provinces in China. During 2018 to 2019, a fruit scab disease was identified on the Chinese cultivar Hongyang (A. chinensis var. rufopulpa) in Hefei city, Anhui Province. Irregular, cracked ...
DOI:
10.1094/PDIS-09-19-1835-PDN

2. Andean and Ordinary Strains of Potato Virus S Infecting Potatoes in Southern Kazakhstan

Author:
Karpova, O.; Alexandrova, A.; Yeriskina, E.; Kryldakov, R.; Gritsenko, D.; Galiakparov, N.; Iskakov, B.
Source:
Plant disease 2020 v.104 no.2 pp. 599
ISSN:
0191-2917
Subject:
Potato virus S; Solanum tuberosum; cultivars; genetic databases; genome; nucleotide sequences; plant diseases and disorders; plant viruses; potatoes; reverse transcriptase polymerase chain reaction; seed tubers; viruses; Andes region; Australia; China; Kazakhstan
Abstract:
... Southern Kazakhstan comprises Turkistan, Zhambyl, and Almaty administrative regions; it is the most densely populated territory of the country and one of the biggest potato (Solanum tuberosum L.) producing areas. Around 1.17 million metric tons, 33% of the whole country’s production, are produced here annually. Potato virus S belongs to the genus Carlavirus (Betaflexiviridae); it has a single-stra ...
DOI:
10.1094/PDIS-09-19-1822-PDN

3. An Improved Method for the Identification of Soybean Resistance to Phytophthora sojae Applied to Germplasm Resources from the Huanghuaihai and Dongbei Regions of China

Author:
Yang, Jin; Ye, Wenwu; Wang, Xiaomen; Ren, Linrong; Yao, Yan; Wang, Xiaoli; Wang, Yan; Dong, Suomeng; Zheng, Xiaobo; Wang, Yuanchao
Source:
Plant disease 2020 v.104 no.2 pp. 408-413
ISSN:
0191-2917
Subject:
Phytophthora sojae; breeding programs; cities; crop production; cultivars; etiolation; germplasm; inoculation methods; plant breeding; soybeans; stem rot; virulence; China
Abstract:
... Phytophthora root and stem rot (PRR) caused by Phytophthora sojae is a destructive disease afflicting soybean. The use of resistant cultivars is the most effective method to combat PRR. PRR resistance was assessed in 223 soybean cultivars from Huanghuaihai and Dongbei, major soybean-producing regions in east central and northeastern China. To evaluate levels of soybean resistance to P. sojae, we u ...
DOI:
10.1094/PDIS-01-19-0168-RE

4. Assessing Rate-Reducing Foliar Resistance to Anthracnose Crown Rot and Fruit Rot in Strawberry

Author:
Jacobs, Raymond L.; Adhikari, Tika B.; Pattison, Jeremy; Yencho, G. Craig; Fernandez, Gina E.; Louws, Frank J.
Source:
Plant disease 2020 v.104 no.2 pp. 398-407
ISSN:
0191-2917
Subject:
Colletotrichum acutatum; Glomerella cingulata; anthracnose; breeding lines; breeding programs; crown rot; cultivars; disease course; disease outbreaks; disease resistance; fungi; genotype; greenhouses; image analysis; leaf area; pathogens; plant breeding; planting; strawberries; North Carolina
Abstract:
... Anthracnose fruit rot and anthracnose crown rot (ACR) caused by two species complexes of the fungus referred to as Colletotrichum acutatum and Colletotrichum gloeosporioides, respectively, are major pathogens of strawberry in North Carolina. Anthracnose epidemics are common when susceptible cultivars and asymptomatic planting stocks carrying quiescent Colletotrichum infection or hemibiotrophic inf ...
DOI:
10.1094/PDIS-04-19-0687-RE

5. Bacteriome and Mycobiome in Nicotiana tabacum Fields Affected by Black Shank Disease

Author:
Chen, Xiaoyulong; He, Baoyu; Yang, Hong; Cernava, Tomislav
Source:
Plant disease 2020 v.104 no.2 pp. 315-319
ISSN:
0191-2917
Subject:
Nicotiana tabacum; Phytophthora nicotianae; bacteriome; biomarkers; black shank disease; comparative study; cultivation area; data collection; disease incidence; genes; internal transcribed spacers; microbiome; ribosomal DNA; roots; soil sampling; tobacco; China
Abstract:
... Phytophthora nicotianae is a widespread cause of black shank disease of tobacco plants and causes substantial harvest losses in all major cultivation areas. The oomycete primarily affects plant roots and the stem, where it leads to a progressing decay of the diseased tissues. In this resource announcement, we provide two complementary datasets comprising 16S gene fragment amplicons (bacteriome) an ...
DOI:
10.1094/PDIS-07-19-1342-A

6. Characterization of Natural Isolates of Bipolaris maydis Associated with Mating Types, Genetic Diversity, and Pathogenicity in Fujian Province, China

Author:
Dai, Yuli; Gan, Lin; Ruan, Hongchun; Shi, Niuniu; Du, Yixin; Chen, Furu; Yang, Xiujuan
Source:
Plant disease 2020 v.104 no.2 pp. 323-329
ISSN:
0191-2917
Subject:
Bipolaris maydis; DNA; Zea mays subsp. mays; corn; crop production; cultivars; fungi; genetic variation; leaf blight; mating types; microsatellite repeats; pathogenicity; polymerase chain reaction; sexual reproduction; sweetcorn; China
Abstract:
... Due to the natural destructiveness and persistence of the southern corn leaf blight (SCLB) fungus Bipolaris maydis (Nisikado et Miyake) Shoem, the characterization of B. maydis field isolates is essential to guide the rational distribution of resistant materials in corn-growing regions. In the present study, 102 field isolates collected from seven locations covering the entire region of Fujian Pro ...
DOI:
10.1094/PDIS-03-19-0650-RE

7. Development of a Specific Polymerase Chain Reaction System for the Detection of Rice Orange Leaf Phytoplasma

Author:
Wang, Zhiyi; Zhu, Yingzhi; Li, Zhanbiao; Yang, Xin; Zhang, Tong; Zhou, Guohui
Source:
Plant disease 2020 v.104 no.2 pp. 521-526
ISSN:
0191-2917
Subject:
DNA; Nephotettix; Oryza sativa; Phytoplasma; Recilia dorsalis; crop production; disease control; essential genes; false positive results; foliar diseases; geographical distribution; leaves; nucleotide sequences; pathogens; polymerase chain reaction; rice; surveys; China
Abstract:
... Rice orange leaf disease (ROLD), caused by rice orange leaf phytoplasma (ROLP), is transmitted by leafhopper vectors Recilia dorsalis and Nephotettix cinticeps. ROLD severely devastates rice production in Asia. Accurate detection of the pathogen is important for disease management. Current nested polymerase chain reaction (nested PCR) method using phytoplasma universal primers is widely used to de ...
DOI:
10.1094/PDIS-05-19-1047-RE

8. Distribution of the Infection Time of Ascospores of Venturia inaequalis

Author:
Philion, Vincent; Joubert, Valentin; Trapman, Marc; Hjelkrem, Anne-Grete R.; Stensvand, Arne
Source:
Plant disease 2020 v.104 no.2 pp. 465-473
ISSN:
0191-2917
Subject:
Venturia inaequalis; apple scab; ascospores; computer simulation; computer software; equations; fungicides; leaves; models; rain; risk; spraying; spring; temperature; trees
Abstract:
... In many areas where spring is wet, fungicides are applied in relation to rain events that trigger ejection of ascospores of Venturia inaequalis, which cause primary infections of apple scab. Past studies established the rate of ejection during rain in relation to light and temperature, and determined the wetting time required for infection. Simulation software uses this information to calculate ri ...
DOI:
10.1094/PDIS-11-18-2046-RE

9. Diversity and Distribution of Rice Blast (Pyricularia oryzae Cavara) Races in Vietnam

Author:
Nguyet, Nguyen T. M.; Long, Hoang H.; Ngoc, Nguyen B.; Nhai, Nguyen T; Thuy, Nguyen T. T.; Hayashi, Nagao; Fukuta, Yoshimichi
Source:
Plant disease 2020 v.104 no.2 pp. 381-387
ISSN:
0191-2917
Subject:
Magnaporthe oryzae; blast disease; coasts; cultivars; races; resistance genes; river deltas; virulence; Vietnam
Abstract:
... A total of 239 isolates of blast (Pyricularia oryzae Cavara) collected from northern and central Vietnam showed a wide variation in pathogenicity based on the reaction patterns to 25 differential varieties (DVs) harboring 23 resistance genes and susceptible cultivar Lijiangxintuanheigu (LTH). The frequencies of isolates virulent toward DVs for Pish, Pik-m, Pi1, Pik-h, Pik, Pik-p, Pi7(t), Pi9(t), P ...
DOI:
10.1094/PDIS-05-19-1008-RE

10. Effect of Pyrisoxazole on Colletotrichum scovillei Infection and Anthracnose on Chili

Author:
Gao, Y. Y.; Li, X. X.; He, L. F.; Li, B. X.; Mu, W.; Liu, F.
Source:
Plant disease 2020 v.104 no.2 pp. 551-559
ISSN:
0191-2917
Subject:
Colletotrichum; anthracnose; appressoria; conidia; disease control; disease course; electron microscopy; fungicides; germ tube; germination; mechanism of action; median effective concentration; mycelium; phytotoxicity; risk; sporulation
Abstract:
... Anthracnose caused by Colletotrichum scovillei is one of the most destructive diseases affecting chili production. Disease control mainly relies on conventional fungicides, and repeated exposure to single-site mode-of-action fungicides may pose a risk for the development of resistant isolates within the population. Our previous study suggested that pyrisoxazole has strong inhibitory activity again ...
DOI:
10.1094/PDIS-06-19-1291-RE

11. Enhancing PCR Capacity To Detect ‘Candidatus Liberibacter asiaticus’ Utilizing Whole Genome Sequence Information

Author:
Bao, Minli; Zheng, Zheng; Sun, Xiaoan; Chen, Jianchi; Deng, Xiaoling
Source:
Plant disease 2020 v.104 no.2 pp. 527-532
ISSN:
0191-2917
Subject:
Candidatus Liberibacter asiaticus; Citrus; Diaphorina citri; genes; genomics; greening disease; high-throughput nucleotide sequencing; loci; nucleotide sequences; oligonucleotides; polymerase chain reaction; ribonucleotide reductase; ribosomal RNA; single nucleotide polymorphism
Abstract:
... ‘Candidatus Liberibacter asiaticus’ (CLas) is an unculturable α-proteobacterium associated with citrus Huanglongbing (HLB; yellow shoot disease). PCR procedures that accurately confirm or exclude CLas infection in citrus tissue/Asian citrus psyllid (ACP) samples are critical for HLB management. When CLas was described in 1994, a 23-bp signature oligonucleotide sequence (OI1) in the 16S rRNA gene ( ...
DOI:
10.1094/PDIS-05-19-0931-RE

12. Etiology of Branch Dieback and Shoot Blight of English Walnut Caused by Botryosphaeriaceae and Diaporthe Species in Southern Spain

Author:
López-Moral, Ana; Lovera, María; Raya, María del Carmen; Cortés-Cosano, Nerea; Arquero, Octavio; Trapero, Antonio; Agustí-Brisach, Carlos
Source:
Plant disease 2020 v.104 no.2 pp. 533-550
ISSN:
0191-2917
Subject:
Botryosphaeria dothidea; Cytospora; DNA; Diaporthe amygdali; Diplodia seriata; Juglans regia; Neofusicoccum parvum; blight; conidia; dieback; etiology; fruits; fungi; genomics; internal transcribed spacers; mycelium; orchards; peptide elongation factors; shoots; temperature; tubulin; virulence; walnuts; Spain
Abstract:
... English walnut (Juglans regia L.) is considered an economically important fruit crop worldwide. In Spain, little attention has been given to walnut diseases owing to the minor economic importance of the walnut crop in the country until recently. In 2017, typical symptoms of branch dieback and shoot blight of English walnut were observed in southern Spain. From 2017 to 2018, 10 commercial walnut or ...
DOI:
10.1094/PDIS-03-19-0545-RE

13. Evaluating Quantitative Trait Locus Resistance in Tomato to Multiple Xanthomonas spp.

Author:
Bernal, Eduardo; Liabeuf, Debora; Francis, David M.
Source:
Plant disease 2020 v.104 no.2 pp. 423-429
ISSN:
0191-2917
Subject:
Xanthomonas gardneri; Xanthomonas perforans; backcrossing; chromosomes; field experimentation; foliar diseases; genetic resistance; introgression; major genes; pesticides; quantitative trait loci; tomatoes; Hawaii
Abstract:
... Bacterial spot of tomato is a foliar disease caused by four Xanthomonas species. Identifying genetic resistance in wild tomatoes and subsequent breeding of varieties has been a strategy to reduce the loss from this disease because control using pesticides has been ineffective. Three independent sources of resistance have been identified with quantitative trait loci (QTL) mapping to the centromeric ...
DOI:
10.1094/PDIS-03-19-0669-RE

14. Evaluating the Sensitivities and Efficacies of Fungicides with Different Modes of Action Against Phomopsis asparagi

Author:
Shi, Niuniu; Ruan, Hongchun; Gan, Lin; Dai, Yuli; Yang, Xiujuan; Du, Yixin; Chen, Furu
Source:
Plant disease 2020 v.104 no.2 pp. 448-454
ISSN:
0191-2917
Subject:
Diaporthe; crop production; disease control; field experimentation; frequency distribution; fungicide resistance; greenhouses; growth retardation; mechanism of action; median effective concentration; mycelium; pyraclostrobin; stem blight; tebuconazole; trifloxystrobin; China
Abstract:
... Asparagus stem blight caused by Phomopsis asparagi is a major hindrance to asparagus production worldwide. Currently, fungicides are used to manage the disease in commercial production, but resistance to common fungicides has emerged in the wild population. In the present study, 132 isolates of P. asparagi collected from different provinces in China were tested for sensitivities to pyraclostrobin, ...
DOI:
10.1094/PDIS-05-19-1040-RE

15. First Report of a Fusarium Wilt of Black Currant Caused by Fusarium avenaceum in Northeastern Poland

Author:
Okorski, Adam; Pszczółkowska, Agnieszka; Markuszewki, Bogumił; Olszewski, Jacek; Sięda, Monika; Makowczenko, Karol G.; Paukszto, Łukasz; Jastrzębski, Jan P.
Source:
Plant disease 2020 v.104 no.2 pp. 593
ISSN:
0191-2917
Subject:
DNA; Fusarium avenaceum; Fusarium wilt; actin; black currants; conidia; cultivars; culture media; death; ethanol; fungi; genome; greenhouse experimentation; horticultural crops; leaves; mycelium; pathogenicity; pathogens; peptide elongation factors; phylogeny; planting; quantitative polymerase chain reaction; shoots; sodium hypochlorite; species identification; sporodochia; sporulation; tubulin; wilting; Poland
Abstract:
... New pathogens and diseases affecting mostly horticultural crops have recently been reported from Poland owing to the facilitation of trade in plant materials (Pszczółkowska et al. 2016). Poland is the world’s largest producer of currants. Blackcurrant planting area is 44,000 ha, and average annual yield is approximately 130,000 metric tons. In 2017 to 2018, withering of 1-year-old shoots was obser ...
DOI:
10.1094/PDIS-04-19-0700-PDN

16. First Report of a Leaf Blight in Rice (Oryza sativa) Caused by Pantoea ananatis and Pantoea stewartii in Thailand

Author:
Arayaskul, N.; Poompouang, S.; Lithanatudom, P.; Lithanatudom, S. K.
Source:
Plant disease 2020 v.104 no.2 pp. 562
ISSN:
0191-2917
Subject:
Oryza sativa; Pantoea ananatis; Pantoea stewartii; Xanthomonas oryzae pv. oryzae; agar; bacteria; databases; disease incidence; essential genes; gels; glucose; indoles; leaf blight; leaves; oligodeoxyribonucleotides; paddies; pathogenicity; pathogens; polymerase chain reaction; ribosomal DNA; rice; sequence alignment; species identification; urease; Thailand
Abstract:
... In 2014 to 2017, the prevalence of leaf blight disease was surveyed in various rice fields located in northern Thailand with 40% disease incidence. Rice leaves with leaf blight symptoms (30 to 50% of the lesion area) ranging from yellow, light brown, to slightly reddish spots were collected and used for bacterial isolation, identification, and storage. Pieces of rice leaf were cut, surface sterili ...
DOI:
10.1094/PDIS-05-19-1038-PDN

17. First Report of Alternaria Leaf Spot Caused by Alternaria tenuissima on Sugar Beet (Beta vulgaris) in Minnesota, U.S.A.

Author:
Khan, M. F. R.; Haque, M. E.; Bloomquist, M.; Bhuiyan, M. Z. R.; Brueggeman, R.; Zhong, S.; Poudel, R. Sharma; Gross, T.; Hakk, P.; Leng, Y.; Liu, Y.
Source:
Plant disease 2020 v.104 no.2 pp. 580
ISSN:
0191-2917
Subject:
Alternaria tenuissima; Beta vulgaris; DNA; air drying; autoclaving; cleaning; conidia; cultivars; culture media; developmental stages; ethanol; fungi; greenhouses; internal transcribed spacers; isolation techniques; leaf spot; leaves; mycelium; pathogenicity; polymerase chain reaction; relative humidity; sequence analysis; spraying; sugar beet; Minnesota
Abstract:
... Minnesota is the top sugar beet (Beta vulgaris L.) producing state in the United States. In September 2018, foliar symptoms were first observed on older sugar beet leaves in about 3% of the cultivars in a coded variety trial in Renville (N 44.78, W –95.15), Minnesota. Symptoms were dark brown circular or irregular spots on healthy plants. Initially, the lesions were confined within distinct parall ...
DOI:
10.1094/PDIS-03-19-0603-PDN

18. First Report of a New Highly Virulent Pathotype of Sunflower Downy Mildew (Plasmopara halstedii) Overcoming the Pl₈ Resistance Gene in Europe

Author:
Martín-Sanz, A.; Rueda, S.; García-Carneros, A. B.; Molinero-Ruiz, L.
Source:
Plant disease 2020 v.104 no.2 pp. 597
ISSN:
0191-2917
Subject:
Helianthus annuus; Helianthus argophyllus; Plasmopara halstedii; breeding programs; cotyledons; databases; disease incidence; downy mildew; greenhouses; growth retardation; hybrids; inbred lines; leaves; markets; monitoring; nuclear genome; pathogens; pathotypes; perlite; relative humidity; resistance genes; ribosomal DNA; seedlings; sporangia; sporulation; spring; virulence; France; Italy
Abstract:
... Downy mildew of sunflower (Helianthus annuus L.), caused by the oomycete Plasmopara halstedii, is a major constraint to production worldwide. The inbred line RHA 340 has been extensively used to produce resistant hybrids. It harbors the Pl₈ gene derived from H. argophyllus Torrey and Gray (Miller and Gulya 1988), providing resistance to all pathotypes of P. halstedii in Europe described to date (M ...
DOI:
10.1094/PDIS-07-19-1425-PDN

19. First Report of Anthracnose Disease Caused by Colletotrichum truncatum on the Velvetleaf (Abutilon theophrasti) in China

Author:
Cong, Y. L.; Hou, J.; Liu, L. P.; Liu, Z. Y.; Pan, Y.; Zhang, X. M.; Hu, T. J.; Liu, F.; Yu, Y.
Source:
Plant disease 2020 v.104 no.2 pp. 565
ISSN:
0191-2917
Subject:
Abutilon theophrasti; Colletotrichum truncatum; annuals; anthracnose; appressoria; chickpeas; chitin synthase; conidia; culture media; disease control; disease incidence; eggplants; ethanol; financial economics; flora; fungi; gardens; genes; glyceraldehyde-3-phosphate dehydrogenase; grapes; hyphae; internal transcribed spacers; leaves; loci; medicine; muskmelons; olives; pathogens; pepper; phylogeny; probability analysis; relative humidity; ribosomal DNA; sodium hypochlorite; soybeans; tomatoes; China
Abstract:
... Velvetleaf (Abutilon theophrasti), an annual plant in the family Malvaceae, is an important source of fiber and medicine (Flora of China 2007; Su et al. 2010). Dark brown lesions were observed on the leaves of A. theophrasti in the Herbal Garden of Jilin Agricultural University (125.23°E, 43.47°N), Jilin Province, China, in July 2015 and 2016, respectively. The disease incidence was about 20%. The ...
DOI:
10.1094/PDIS-08-19-1657-PDN

20. First Report of Anthracnose of Chili Pepper Fruit Caused by Colletotrichum truncatum in Korea

Author:
Oo, May Moe; Oh, Sang-Keun
Source:
Plant disease 2020 v.104 no.2 pp. 564
ISSN:
0191-2917
Subject:
Colletotrichum truncatum; DNA primers; anthracnose; appressoria; color; conidia; culture media; flavor; fruits; fungi; genes; glyceraldehyde-3-phosphate dehydrogenase; hot peppers; internal transcribed spacers; mycelium; nutritive value; pathogenicity; relative humidity; ribosomal DNA; seed quality; sodium hypochlorite; tissue paper; vegetable crops; South Korea
Abstract:
... Chili pepper is a popular vegetable crop valued worldwide for the color, flavor, and nutritional value. Anthracnose caused by Colletotrichum spp. is an economically important disease worldwide, affecting both fruit and seed quality. In September 2015, anthracnose symptoms were observed on approximately 20 to 30% of the fruit (cv. Manita) growing in a field in Goesan County, Chungcheongnam-do Provi ...
DOI:
10.1094/PDIS-09-19-1874-PDN