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You searched for: Journal name Plant disease Remove constraint Journal name: Plant disease Publication year rev 7980-2020 Remove constraint Publication year rev: 7980-2020 Source 2020 v.104 no.3 Remove constraint Source: 2020 v.104 no.3
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1. Alternaria alternata Causing Leaf Spot on Dendrobium candidum in Anhui Province, China

Author:
Xingyu Wang; Ji Ma; Huijun Qiao; Min Guo
Source:
Plant disease 2020 v.104 no.3 pp. 987
ISSN:
0191-2917
Subject:
Alternaria alternata; DNA primers; DNA-directed RNA polymerase; Dendrobium; Oriental traditional medicine; allergens; anti-aging properties; cefotaxime; conidia; culture media; ethanol; fungi; genes; glyceraldehyde-3-phosphate dehydrogenase; greenhouses; growth chambers; immunity; internal transcribed spacers; leaf spot; leaves; loci; pathogenicity; pathogens; relative humidity; seedlings; tubulin; China
Abstract:
... Dendrobium candidum is an orchid plant commonly used in traditional Chinese medicine due to its antitumor and antiaging effects, as well as the enhancement of human body immunity. During May 2019, an estimated 20% of D. candidum plants were observed with leaf spots in the greenhouse in Ningguo, Anhui Province, China. The initial disease symptoms appeared as small brown to black spots on the leaves ...
DOI:
10.1094/PDIS-08-19-1678-PDN

2. Characterization of the Complete Genome and P0 Protein for a Previously Unreported Genotype of Cotton Leafroll Dwarf Virus, an Introduced Polerovirus in the United States

Author:
Sofia Avelar; Roberto Ramos-Sobrinho; Kassie Conner; Robert L. Nichols; Kathy Lawrence; Judith K. Brown
Source:
Plant disease 2020 v.104 no.3 pp. 780-786
ISSN:
0191-2917
Subject:
Cotton leafroll dwarf virus; amino acids; cotton; gene silencing; genome; genotype; growth retardation; internodes; leaves; open reading frames; phylogeny; reverse transcriptase polymerase chain reaction; reverse transcription; sequence analysis; viral proteins; Alabama; Argentina; Brazil
Abstract:
... Virus-like disease symptoms consisting of leaf cupping, shortened internodes, and overall stunting were observed in commercial cotton fields in Alabama in 2017 to 2018. To determine the complete genome sequence of the suspected causal polerovirus, symptomatic leaf samples were collected in Macon County, Alabama, and subjected to Illumina RNA sequencing. Based on BLASTn analysis, the Illumina conti ...
DOI:
10.1094/PDIS-06-19-1316-RE

3. Detection of Phytophthora infestans by Loop-Mediated Isothermal Amplification, Real-Time LAMP, and Droplet Digital PCR

Author:
Jean B. Ristaino; Amanda C. Saville; Rajesh Paul; Donald C. Cooper; Qingshan Wei
Source:
Plant disease 2020 v.104 no.3 pp. 708-716
ISSN:
0191-2917
Subject:
Phytophthora infestans; databases; detection limit; disease surveillance; droplets; food security; fungi; loop-mediated isothermal amplification; monitoring; pathogens; polymerase chain reaction; potatoes; tomatoes
Abstract:
... Phytophthora infestans is the causal agent of potato late blight, a devastating disease of tomato and potato and a threat to global food security. Early detection and intervention is essential for effective management of the pathogen. We developed a loop-mediated isothermal amplification (LAMP) assay for P. infestans and compared this assay to conventional PCR, real-time LAMP, and droplet digital ...
DOI:
10.1094/PDIS-06-19-1186-RE

4. Effect of Application Rate and Timing on Residual Efficacy of Pyraclostrobin in the Control of Pepper Anthracnose

Author:
Y. Y. Gao; X. X. Li; L. F. He; B. X. Li; W. Mu; F. Liu
Source:
Plant disease 2020 v.104 no.3 pp. 958-966
ISSN:
0191-2917
Subject:
Colletotrichum; anthracnose; application rate; application timing; crop yield; flowering; fludioxonil; fruits; industry; maximum residue limits; median effective concentration; metabolites; mycelium; pepper; pesticide application; pyraclostrobin; spore germination; structural equation modeling; sustainable development; tebuconazole
Abstract:
... Anthracnose is a devastating disease that seriously affects pepper production worldwide. Anthracnose management is currently a major problem because of the widespread and long period of infection of this disease. Therefore, determination of the optimal fungicide application timing is important for controlling anthracnose in a timely manner . In vitro sensitivity tests showed no significant differe ...
DOI:
10.1094/PDIS-03-19-0435-RE

5. Efficacy of Natamycin Against Gray Mold of Stored Mandarin Fruit Caused by Isolates of Botrytis cinerea With Multiple Fungicide Resistance

Author:
S. Saito; F. Wang; C. L. Xiao
Source:
Plant disease 2020 v.104 no.3 pp. 787-792
ISSN:
0191-2917
Subject:
Botrytis cinerea; Citrus; antibiotic resistance; azoxystrobin; biopesticides; conidia; cross resistance; efficacy testing; fludioxonil; food industry; fruit diseases; fruits; fungal growth; fungicide resistance; germination; gray mold; mandarins; mechanism of action; minimum inhibitory concentration; mycelium; natamycin; phenotype; postharvest diseases; pyrimethanil; thiabendazole; California
Abstract:
... Gray mold caused by Botrytis cinerea is an emerging postharvest disease of mandarin fruit in California. Management of postharvest diseases of mandarins relies on postharvest fungicides; however, multiple resistance to fungicides of different modes of action is common in B. cinerea populations from mandarin, leading to their failure to control decay. Natamycin is commonly used in the food industry ...
DOI:
10.1094/PDIS-04-19-0844-RE

6. Evaluation of Recombinase Polymerase Amplification Assay for Detecting Meloidogyne javanica

Author:
Yuan-kai Chi; Wei Zhao; Meng-di Ye; Farman Ali; Tao Wang; Ren-de Qi
Source:
Plant disease 2020 v.104 no.3 pp. 801-807
ISSN:
0191-2917
Subject:
DNA; Meloidogyne javanica; adults; detection limit; diagnostic techniques; females; galls; genetic markers; juveniles; polymerase chain reaction; recombinases; soil sampling; surveys; China
Abstract:
... Meloidogyne javanica is one of the most widespread and economically important nematodes in many countries, including China. In this study, a recombinase polymerase amplification (RPA) assay was evaluated for the detection of M. javanica based on the sequences of a sequence-characterized amplified regions marker gene segment. The RPA assay specifically detected M. javanica from individual juvenile ...
DOI:
10.1094/PDIS-07-19-1473-RE

7. First Report of Aspergillus parasiticus on Barley Grain in Serbia

Author:
M. Nikolić; I. Savić; A. Obradović; J. Srdić; G. Stanković; M. Stevanović; S. Stanković
Source:
Plant disease 2020 v.104 no.3 pp. 987
ISSN:
0191-2917
Subject:
Alternaria; Aspergillus parasiticus; Fusarium; Hordeum vulgare; aflatoxins; agar; agroecology; awns; barley; biosynthesis; bleaching; bleaching agents; climate change; climatic factors; conidia; corn; crop production; culture media; drought; feeds; flowering; food safety; genes; growing season; intergenic DNA; pathogenicity; pathogens; polymerase chain reaction; restriction endonucleases; temperature; wheat; yeasts; Serbia
Abstract:
... Barley (Hordeum vulgare L.) is a secondary grain crop in Serbia used commercially for animal feed, seed, and human food applications. The production of barley in the 2016 to 2017 growing season reached a record yield of almost 400,000 metric tons (USDA 2017). Aspergillus contamination has been rare in the agroecological conditions of cereal-growing areas in Serbia. Changes in climatic factors, suc ...
DOI:
10.1094/PDIS-07-19-1364-PDN

8. First Report of Beet Curly Top Virus Infecting Cannabis sativa in Western Colorado

Author:
Y. Giladi; L. Hadad; N. Luria; W. Cranshaw; O. Lachman; A. Dombrovsky
Source:
Plant disease 2020 v.104 no.3 pp. 999
ISSN:
0191-2917
Subject:
Beet curly top virus; Beta vulgaris; Cannabis sativa; Circulifer tenellus; beans; color; computer software; crops; cucumbers; cultivars; diagnostic techniques; flowering; genome; growing season; hemp; high-throughput nucleotide sequencing; leaves; nucleotide sequences; oligodeoxyribonucleotides; peppers; plant diseases and disorders; plant viruses; polymerase chain reaction; ribosomal RNA; spinach; sugar beet; tomatoes; viruses; Colorado; Israel
Abstract:
... In industrial hemp (Cannabis sativa L.) fields located in North Fork Valley, Delta County, Colorado, U.S.A., plants bearing symptoms of stunted growth and yellowing leaves were observed in each growing season between 2015 and 2019. Infected plants display initially fading leaf color to pale green, starting at the leaf base and expanding toward the tips, producing a yellow-green mosaic pattern. Wit ...
DOI:
10.1094/PDIS-08-19-1656-PDN

9. First Report of Bougainvillea Floral Bract Proliferation Disease in Cuba and Its Association with Phytoplasmal Infection

Author:
W. Wei; E. Pérez-López; Y. Zhao
Source:
Plant disease 2020 v.104 no.3 pp. 967
ISSN:
0191-2917
Subject:
Aster yellows phytoplasma; Bougainvillea glabra; Candidatus Phytoplasma asteris; Euphorbia pulcherrima; bracts; branching; cetyltrimethylammonium bromide; flowers; gardens; genes; hybrids; intergenic DNA; leaves; lianas; loci; morphs; nucleotide sequences; oligodeoxyribonucleotides; ornamental plants; phytoplasmal diseases; polymerase chain reaction; ribosomal DNA; ribosomal RNA; ribosomal proteins; sequence homology; temperate zones; Brazil; Cuba; India
Abstract:
... Bougainvillea is a genus of evergreen woody climbers or bushes native to South America. The plants in the genus often produce multiple inflorescences consisting of sepal-like bracts and waxy flowers. Being popular ornamental plants, bougainvilleas are widely cultivated in tropical, subtropical, and temperate areas around the world. Bougainvillea × buttiana refers to a variety of garden hybrids of ...
DOI:
10.1094/PDIS-09-19-2052-PDN

10. First Report of Cassava common mosaic virus Infecting Cassava in Mainland China

Author:
D. C. Tuo; G. Y. Zhao; P. Yan; R. M. Li; X. Chen; W. Q. Wang; X. Y. Li; Y. Yao; H. G. Cui; W. T. Shen; P. Zhou
Source:
Plant disease 2020 v.104 no.3 pp. 997
ISSN:
0191-2917
Subject:
African cassava mosaic virus; Cassava common mosaic virus; Manihot esculenta; Nicotiana benthamiana; RNA; abnormal development; amino acids; cassava; chlorosis; coat proteins; computer software; crop production; deformation; electron microscopy; gardens; genes; germplasm; leaves; nucleotide sequences; oligodeoxyribonucleotides; plant diseases and disorders; plant extracts; plant viruses; reverse transcriptase polymerase chain reaction; sequence analysis; virion; viruses; Brazil; China; Latin America; Taiwan
Abstract:
... Cassava (Manihot esculenta Crantz) common mosaic disease (CCMD) caused by cassava common mosaic virus (CsCMV; Alphaflexiviridae, Potexvirus) was first reported in southern Brazil and is widespread in Latin America (Calvert et al. 2002; Lozano et al. 2017; Zanini et al. 2018). It can cause >30% losses in root yield (Venturini et al. 2016), and severity is increased during cool periods in subtropica ...
DOI:
10.1094/PDIS-08-19-1585-PDN

11. First Report of Cercospora Leaf Spot Caused by Cercospora chenopodii on Spinacia oleracea in the U.S.A.

Author:
T. Synoground; A. Batson; M. L. Derie; L. B. Koenick; S. J. Pethybridge; L. J. du Toit
Source:
Plant disease 2020 v.104 no.3 pp. 976
ISSN:
0191-2917
Subject:
Beta vulgaris subsp. vulgaris; Cercospora beticola; Spinacia oleracea; USDA National Plant Germplasm System; actin; agar; atomization; beets; bolting; calmodulin; chard; chloramphenicol; conidia; consensus sequence; cultivars; fresh market; genes; greenhouses; growth chambers; homozygosity; internal transcribed spacers; leaf area; leaf spot; leaves; lighting; pathogenicity; peptide elongation factors; phylogeny; plastic bags; ribosomal DNA; sodium hypochlorite; spinach; sporulation; standard deviation; sugar beet; summer; New Jersey; Washington (state)
Abstract:
... In November 2017, leaf spots were observed in a fresh market spinach crop of cultivar SV2157VB in New Jersey at ∼20% incidence but not in the adjacent crop of Unipack-151. Pale tan lesions (3 to 8 mm in diameter) had gray sporulation at the centers. Symptomatic leaf pieces were surface-sterilized in 0.6% NaOCl for 60 s, triple-rinsed in sterilized water, dried, and plated onto PDA and water agar ( ...
DOI:
10.1094/PDIS-09-19-1924-PDN

12. First Report of Cladobotryum protrusum Causing Cobweb Disease on Cultivated Morchella importuna

Author:
Y. F. Lan; Q. Q. Cong; Q. W. Wang; L. N. Tang; X. M. Li; Q. W. Yu; X. Cui; X. R. An; C. X. Yu; F. H. Kong; X. D. Li
Source:
Plant disease 2020 v.104 no.3 pp. 977
ISSN:
0191-2917
Subject:
Coprinus comatus; Hypomyces; Morchella; cobweb disease; color; conidia; cultivation area; culture media; fruiting bodies; genomics; internal transcribed spacers; mushrooms; mycelium; pathogenicity; pathogens; peptide elongation factors; polymerase chain reaction; relative humidity; ribosomal DNA; soil; spraying; surveys; China
Abstract:
... Morel mushroom (Morchella spp.) has high nutritional, medicinal, and commercial values and is popular worldwide. The cultivation area of M. importuna has been increasing rapidly in China since 2012. Now, China has become the largest producer and exporter of morel mushrooms. During a survey in Tai’an of Shandong Province, China, in April 2019, unusual symptoms were observed on M. importuna, with an ...
DOI:
10.1094/PDIS-08-19-1611-PDN

13. First Report of Cotton leafroll dwarf virus Infecting Upland Cotton (Gossypium hirsutum) in Texas

Author:
Olufemi J. Alabi; Thomas Isakeit; Robert Vaughn; David Stelly; Kassie N. Conner; Brianna C. Gaytán; Cecilia Villegas; Christian Hitzelberger; Luis De Santiago; Cecilia Monclova-Santana; Judith K. Brown
Source:
Plant disease 2020 v.104 no.3 pp. 998
ISSN:
0191-2917
Subject:
Cotton leafroll dwarf virus; Gossypium hirsutum; RNA; complementary DNA; cotton; disease incidence; dwarfing; economic impact; internodes; leaf extracts; leaves; molecular cloning; oligodeoxyribonucleotides; plant diseases and disorders; plant viruses; plasmid vectors; polymerase chain reaction; seedlings; viruses; Alabama; Texas
Abstract:
... Virus-like symptoms were observed on two upland cotton (Gossypium hirsutum L.) research plots in Brazos County, Texas, during July 2019, and disease incidence ranged between 5 and 20% across fields. Symptoms consisted of leaf distortion, upward leaf cupping, leaf midrib and vein reddening, shortened internodes, and dwarfing of affected plants, which were reminiscent of those attributed to cotton l ...
DOI:
10.1094/PDIS-09-19-2008-PDN

14. First Report of Fusarium oxysporum f. sp. cubense Race 4 Causing Fusarium Wilt Disease of Banana in Turkey

Author:
M. Özarslandan; D. S. Akgül
Source:
Plant disease 2020 v.104 no.3 pp. 974
ISSN:
0191-2917
Subject:
Fusarium oxysporum f. sp. cubense; Fusarium wilt; Musa; Sphagnum; Vitis; bananas; chlamydospores; cities; color; conidia; crops; cultivars; culture media; dipping; disease incidence; fruit diseases; fungi; gel electrophoresis; genetic databases; greenhouse production; greenhouses; intergenic DNA; leaves; mycelium; necrosis; pathogenicity; pathogens; phylogeny; plantlets; polymerase chain reaction; pseudostems; relative humidity; ribosomal RNA; roots; sand; sodium hypochlorite; soil; streptomycin; sulfates; surveys; tissue culture; Jordan; Mediterranean region; Turkey (country)
Abstract:
... Cavendish banana is a valuable agricultural crop along the Mediterranean Coast of Turkey with 369,000 t of production, which meets 67.7% of domestic demand (Turkish Statistical Institute 2018). During a survey of banana greenhouses in Alanya, Anamur, and Gazipasa cities along the Mediterranean coast, plants showing severe wilt symptoms and collapse were detected in March 2018. Yellowing of the old ...
DOI:
10.1094/PDIS-09-19-1881-PDN

15. First Report of Grapevine (Vitis sp.) Cluster Blight Caused by Fusarium proliferatum in Russia

Author:
E. G. Yurchenko; N. V. Savchuk; E. V. Porotikova; S. V. Vinogradova
Source:
Plant disease 2020 v.104 no.3 pp. 991
ISSN:
0191-2917
Subject:
DNA primers; DNA-directed RNA polymerase; Fusarium fujikuroi; Fusarium proliferatum; Vitis; agar; blight; chlamydospores; conidia; crop production; cultivars; culture media; databases; disease control; economic sectors; flowering; genes; hybrids; hyphae; internal transcribed spacers; monitoring; multilocus sequence typing; mycelium; necrosis; pathogenicity; pathogens; peduncle; peptide elongation factors; pigments; plant rots; relative humidity; ripening; shoots; small fruits; sodium hypochlorite; table grapes; tubulin; vineyards; viticulture; China; Pakistan; Russia
Abstract:
... Viticulture is an important economic sector in Russia, with 91,500 ha producing 580,000 tons in 2017 (according to Statistics Service of the Russian Federation, https://gks.ru/enterprise_economy). The monitoring of table “Euro-American” hybrid varieties Citron, Moldova, Augustin, and Ubiley Novocherkasska was conducted in a 50-ha vineyard in Krasnodar region in 2017. Blight of the peduncles and ra ...
DOI:
10.1094/PDIS-05-19-0938-PDN

16. First Report of Leptosphaeria biglobosa ‘brassicae’ Causing Black Leg on Brassica juncea var. tumida in China

Author:
Y. Deng; C. Yu; M. D. Wu; G. Q. Li
Source:
Plant disease 2020 v.104 no.3 pp. 984
ISSN:
0191-2917
Subject:
Brassica juncea var. tumida; DNA fragmentation; Plenodomus biglobosus; Plenodomus lingam; actin; cetyltrimethylammonium bromide; conidia; cotyledons; cultivars; culture media; disease incidence; fungi; hyphae; internal transcribed spacers; pathogenicity; petioles; polymerase chain reaction; pycnidia; relative humidity; ribosomal DNA; secretion; seedlings; stems; tubers; tubulin; vegetables; China
Abstract:
... Tuber mustard (Brassica juncea var. tumida) is a vegetable originating from China, and its stem tuber is mainly used for making “zha cai,” a type of pickled vegetable in China. In May 2019, black leg symptoms on both leaf petioles and stem tubers of ripening-stage tuber mustard were observed in Wuhan, Hubei Province of China, with a disease incidence of 96% in surveyed fields. To determine the cau ...
DOI:
10.1094/PDIS-07-19-1461-PDN

17. First Report of Leptosphaerulina Leaf Spot Caused by Leptosphaerulina trifolii on Trifolium repens in Brazil

Author:
A. A. D. Victoria; B. E. Furtado; M. T. Holz; O. Romero-Arenas; L. J. Dallagnol
Source:
Plant disease 2020 v.104 no.3 pp. 972
ISSN:
0191-2917
Subject:
DNA primers; Leptosphaerulina trifolii; Trifolium repens; asci; ascospores; culture media; forage crops; forage grasses; fungi; grazing; greenhouse production; internal transcribed spacers; leaf area; leaf spot; leaves; pathogens; polymerase chain reaction; protein subunits; relative humidity; ribosomal DNA; ribosomal proteins; stems; temperate zones; Brazil
Abstract:
... White clover (Trifolium repens L.) was introduced into Brazil as a forage crop and is considered a naturalized plant of Rio Grande do Sul State (Schneider 2007). White clover is currently used in combination with forage grasses in temperate climates. In March 2017, in the municipality of Bagé, Rio Grande do Sul, Brazil, scattered black spots appeared on white clover leaves in a grazing area (∼5 ha ...
DOI:
10.1094/PDIS-10-19-2151-PDN

18. First Report of Powdery Mildew (Pseudoidium pedaliacearum) on Stachytarpheta jamaicensis in China

Author:
Hongying Ye; Bao Ying Lin; Wei Rong; Shuangshuang Mei
Source:
Plant disease 2020 v.104 no.3 pp. 978
ISSN:
0191-2917
Subject:
DNA primers; Erysiphe; Sesamum indicum; Stachytarpheta; anamorphs; appressoria; conidia; conidiophores; databases; dietary supplements; fungi; genes; germ tube; greenhouses; industry; internal transcribed spacers; leaves; mycelium; pathogenicity; polymerase chain reaction; powdery mildew; ribosomal DNA; ribosomal RNA; sequence analysis; China; Japan; Korean Peninsula; Nepal
Abstract:
... Stachytarpheta jamaicensis belongs to the family Verbenaceae, and this plant is commonly known for its medical and nutraceutical benefits (Liew and Yong 2016). S. jamaicensis is widely distributed in Hainan, China. In April 2018, typical powdery mildew symptoms were observed on S. jamaicensis leaves in Baishamen Park in Haikou, Hainan Province, China (20.04 N; 110.19 E). Thirty-five to 43% of leav ...
DOI:
10.1094/PDIS-07-19-1449-PDN

19. First Report of Powdery Mildew Caused by Erysiphe michikoae on Celtis sinensis in Korea

Author:
Hyang Burm Lee; Kye Han Lee; Thuong T. T. Nguyen
Source:
Plant disease 2020 v.104 no.3 pp. 984
ISSN:
0191-2917
Subject:
Celtis; DNA primers; Erysiphe; Uncinula; appendages; appressoria; asci; ascospores; bark; conidia; conidiophores; fungi; gardens; herbaria; host range; hyphae; internal transcribed spacers; leaves; mycelium; pathogen identification; pathogenicity; phylogeny; polymerase chain reaction; powdery mildew; pressing; ribosomal DNA; trees; China; Japan; South Africa; South Korea; Taiwan
Abstract:
... Celtis sinensis Pers., commonly known as the Chinese hackberry, belongs to the family Cannabaceae. In Korea, the leaves and bark of this tree are used for the treatment of gastrointestinal disorders and lung abscess. In October 2015 to 2018, symptoms of powdery mildew were observed on the leaves of C. sinensis in a garden at Chonnam National University, Gwangju (35°10′0″N, 126°55′0″E), Korea. The ...
DOI:
10.1094/PDIS-05-19-1056-PDN

20. First Report of Pseudocercospora cercidicola Causing Leaf Spot Disease on Redbud in China

Author:
F. H. Pang; F. X. Tian; S. Q. Wang
Source:
Plant disease 2020 v.104 no.3 pp. 975
ISSN:
0191-2917
Subject:
Callistephus chinensis; Cercis chinensis; DNA; Pseudocercospora; actin; agar; color; conidia; culture media; disease control; droplets; flowers; foliar diseases; fungi; genes; greenhouses; internal transcribed spacers; landscapes; leaf spot; leaves; microscopy; mycelium; ornamental plants; ornamental value; pathogenicity; phenotype; relative humidity; streptomycin; trees; washing; wilting; China; Japan
Abstract:
... Chinese redbud (Cercis chinensis), with a heart-shaped leaf lamina and purple flowers, is widely planted in China as an important landscape species due to its ornamental value. In July and August 2018, a severe leaf-spot disease was observed in the Meicheng park of Nanyang city (33.01°N, 111.01°E) located in Henan province. Of the 60 trees surveyed from different locations in the park, 72% (43) of ...
DOI:
10.1094/PDIS-04-19-0813-PDN