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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.3 Remove constraint Source: 2020 v.104 no.3
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1. A Comparison of Immediate and Short-Term Defensive Responses to Phytophthora Species Infection in Both Susceptible and Resistant Walnut Rootstocks

Author:
Alvarado, Laureano; Saa, Sebastián; Cuneo, Italo F.; Pedreschi, Romina; Morales, Javiera; Larach, Alejandra; Barros, Wilson; Guajardo, Jeannette; Besoain, Ximena
Source:
Plant disease 2020 v.104 no.3 pp. 921-929
ISSN:
0191-2917
Subject:
Juglans regia; Phytophthora cinnamomi; Phytophthora citrophthora; canopy; defense mechanisms; disease resistance; fungal diseases of plants; grafting (plants); growth and development; industry; orchards; phenols; plant pathogenic fungi; root growth; roots; rootstocks; sugars; walnuts
Abstract:
... Clonal rootstocks are one alternative used by the walnut industry to control damage caused by Phytophthora species, traditionally using plants grafted on susceptible Juglans regia rootstock. Vlach, VX211, and RX1 are clonal rootstocks with a degree of resistance to Phytophthora species. The resistance to pathogens in these rootstocks depends on the resistance mechanisms activated by the presence o ...
DOI:
10.1094/PDIS-03-19-0455-RE

2. A Description of the Possible Etiology of the Cilantro Yellow Blotch Disease

Author:
Alabi, Olufemi J.; Gaytán, Brianna C.; Al Rwahnih, Maher; Villegas, Cecilia
Source:
Plant disease 2020 v.104 no.3 pp. 630-633
ISSN:
0191-2917
Subject:
Alfalfa mosaic virus; Beet pseudoyellows virus; Coriandrum sativum; Lettuce chlorosis virus; Nicotiana occidentalis; RNA; chlorosis; cilantro; disease incidence; genome; high-throughput nucleotide sequencing; inoculum; leaves; mixed infection; plant diseases and disorders; plant viruses; reverse transcriptase polymerase chain reaction; spring; California; Texas
Abstract:
... A virus-like disease characterized by foliar yellow blotch symptoms and resembling those described for cilantro yellow blotch disease in California was observed in a 4.05-ha cilantro (Coriandrum sativum) cv. Santo field in Hidalgo County, Texas during spring 2019. Disease incidence at harvest was estimated at ∼20%, and the affected plants were rendered unmarketable. Foliar systemic chlorosis sympt ...
DOI:
10.1094/PDIS-09-19-1958-SC

3. African Basil (Ocimum gratissimum) Is a Reservoir of Divergent Begomoviruses in Uganda

Author:
Mollel, Happyness G.; Ndunguru, Joseph; Sseruwagi, Peter; Alicai, Titus; Colvin, John; Navas-Castillo, Jesús; Fiallo-Olivé, Elvira
Source:
Plant disease 2020 v.104 no.3 pp. 853-859
ISSN:
0191-2917
Subject:
Begomovirus; Ocimum gratissimum; crops; epidemiology; genome; genomics; phylogeny; plant diseases and disorders; plant viruses; tomatoes; viruses; wild plants; Uganda
Abstract:
... Begomoviruses are plant viruses that cause major losses to many economically important crops. Although they are poorly understood, begomoviruses infecting wild plants may have an important role as reservoirs in the epidemiology of viral diseases. This study reports the discovery and genomic characterization of three novel bipartite begomoviruses from wild and cultivated African basil (Ocimum grati ...
DOI:
10.1094/PDIS-08-19-1675-RE

4. Alternaria alternata Causing Leaf Spot on Dendrobium candidum in Anhui Province, China

Author:
Wang, Xingyu; Ma, Ji; Qiao, Huijun; Guo, Min
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

5. Alternaria tenuissima Causing Leaf Necrosis on Polygonatum cyrtonema in Jinzhai, China

Author:
Li, Delong; Guo, Min
Source:
Plant disease 2020 v.104 no.3 pp. 974
ISSN:
0191-2917
Subject:
Actinidia; Alternaria alternata; Alternaria tenuissima; DNA primers; Nelumbo nucifera; Oriental traditional medicine; Polygonatum cyrtonema; color; conidia; conidiophores; crops; culture media; disease incidence; ethanol; fluorescent lighting; fungi; genes; greenhouses; histones; internal transcribed spacers; isolation techniques; kiwifruit; leaf spot; leaves; medicinal plants; mycelium; necrosis; pathogenicity; pathogens; plant tissues; relative humidity; ribosomal DNA; sequence analysis; sodium hypochlorite; tubulin; China
Abstract:
... Polygonatum cyrtonema Hua is one of the most important traditional Chinese medicine herbs used for treating stomach weakness, palpitation, diabetes, and dry cough and is commonly planted in the mountain area of southeast and southwest China. During June of 2018 and 2019, necrotic lesions on the leaf apex and leaf margin of P. cyrtonema were observed in seven greenhouses, affecting approximately 2 ...
DOI:
10.1094/PDIS-08-19-1615-PDN

6. A PCR-Based Method for the Rapid Detection of Chondrostereum purpureum in Apple

Author:
Grinbergs, D.; Chilian, J.; Carrasco-Fernández, J.; France, A.; Moya-Elizondo, E.; Gerding, M.
Source:
Plant disease 2020 v.104 no.3 pp. 702-707
ISSN:
0191-2917
Subject:
Chondrostereum purpureum; DNA; apples; diagnostic techniques; fruit crops; fruit trees; fungi; hosts; necrosis; nursery crops; pathogens; polymerase chain reaction; rapid methods; sawdust; virulence; wood; woody plants
Abstract:
... Silverleaf caused by the basidiomycete Chondrostereum purpureum affects numerous woody species, including fruit tree crops like apple, resulting in wood necrosis and foliar silvering. There are no curative alternatives for this disease, and its management is by prevention methods. Therefore, the aim of this study was to develop a rapid diagnostic tool for the detection and identification of C. pur ...
DOI:
10.1094/PDIS-10-19-2086-RE

7. A Rapid Survey of Avirulence Genes in Field Isolates of Magnaporthe oryzae

Author:
Zhang, Zhen; Jia, Yulin; Wang, Yanli; Sun, Guochang
Source:
Plant disease 2020 v.104 no.3 pp. 717-723
ISSN:
0191-2917
Subject:
DNA; Magnaporthe oryzae; Oryza sativa; amino acid substitution; avirulent strains; blast disease; disease resistance; gels; genes; haplotypes; monitoring; nucleotide sequences; paddies; pathogens; polymerase chain reaction; rapid methods; rice; surveys; Southeastern United States
Abstract:
... Magnaporthe oryzae is the causal agent for the devastating disease rice blast. The avirulence (AVR) genes in M. oryzae are required to initiate robust disease resistance mediated by the corresponding resistance (R) genes in rice. Therefore, monitoring pathogen AVR genes is important to predict the stability of R gene-mediated blast resistance. In the present study, we analyzed the DNA sequence dyn ...
Handle:
10113/6854588
DOI:
10.1094/PDIS-08-19-1688-RE

8. Assessing the Role of Temperature, Inoculum Density, and Wounding on Disease Progression of the Fungal Pathogen Ceratocystis fimbriata Causing Black Rot in Sweetpotato

Author:
Stahr, M.; Quesada-Ocampo, L. M.
Source:
Plant disease 2020 v.104 no.3 pp. 930-937
ISSN:
0191-2917
Subject:
Ceratocystis fimbriata; Ipomoea batatas; disease control; disease incidence; disease progression; environmental factors; financial economics; fungi; growers; industry; inoculum density; pathogens; postharvest treatment; roots; spores; sporulation; storage conditions; sweet potatoes; temperature; United States
Abstract:
... In 2014, Ceratocystis fimbriata, causal agent of black rot in sweetpotato, reemerged and inflicted large financial losses on growers in the United States. Black rot continues to damage sweetpotatoes and has become a priority to the industry since then. In contrast, little is known about the biology of C. fimbriata and the epidemiology of sweetpotato black rot. In this study, effects of environment ...
DOI:
10.1094/PDIS-12-18-2224-RE

9. 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:
Avelar, Sofia; Ramos-Sobrinho, Roberto; Conner, Kassie; Nichols, Robert L.; Lawrence, Kathy; Brown, Judith K.
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

10. Coffee Dieback Caused by Lasiodiplodia pseudotheobromae in Brazil

Author:
Freitas-Lopes, Rejane do Livramento; Machado, Alexandre Reis; Lopes, Ueder Pedro
Source:
Plant disease 2020 v.104 no.3 pp. 980
ISSN:
0191-2917
Subject:
Bayesian theory; Coffea arabica; Lasiodiplodia; altitude; conidia; crop production; culture media; death; dieback; disease control; genetic databases; greenhouses; internal transcribed spacers; leaves; mycelium; pathogen identification; pathogenicity; peptide elongation factors; phylogeny; pigmentation; plant pathogenic fungi; plantations; pycnidia; ribosomal DNA; stems; Brazil
Abstract:
... Coffea arabica is the most important coffee species cultivated worldwide. Although many diseases are known to affect coffee plantations, few pathogens have been reported to cause the death of plants. In 2019, in two growing areas (0.3 and 1 ha) of C. arabica cv. Catuaí 144, in Brejão, Pernambuco, Brazil (8°57′28″S; 36°32′00″W; altitude 750 m), 2% of 3-year-old plants showed dieback symptoms. Infec ...
DOI:
10.1094/PDIS-09-19-1957-PDN

11. Confirmation Report of Bacterial Blight Caused by Xanthomonas oryzae pv. oryzae on Rice in Senegal

Author:
Tall, Hamidou; Tékété, Cheick; Noba, Kandioura; Koita, Ousmane; Cunnac, Sebastien; Hutin, Mathilde; Szurek, Boris; Verdier, Valérie
Source:
Plant disease 2020 v.104 no.3 pp. 968
ISSN:
0191-2917
Subject:
Oryza sativa; Sahel; Xanthomonas oryzae pv. oryzae; agar; bacteria; blight; cephalexin; crop production; food security; genome; leaves; paddies; pathogenicity; pathovars; peptones; plant breeding; polymerase chain reaction; rice; sucrose; sustainable development; France; Senegal
Abstract:
... Bacterial blight (BB) disease caused by Xanthomonas oryzae pv. oryzae (Xoo) was reported in Senegal by Trinh (1980). However, no strain of the bacteria has been isolated on rice, and no additional information on the disease was reported. To confirm Trinh’s observations, we surveyed rice fields in eight different regions of rice production in Senegal between 2014 and 2016. Typical symptoms of BB su ...
DOI:
10.1094/PDIS-07-19-1464-PDN

12. Copper Supplementation in Watering Solution Reaches the Xylem But Does Not Protect Tobacco Plants Against Xylella fastidiosa Infection

Author:
Ge, Qing; Cobine, Paul A.; De La Fuente, Leonardo
Source:
Plant disease 2020 v.104 no.3 pp. 724-730
ISSN:
0191-2917
Subject:
Xylella fastidiosa; anti-infective agents; biofilm; copper; copper sulfate; crops; homeostasis; hosts; in vitro studies; ionome; leaves; models; plant pathogenic bacteria; sap; scorch; spectroscopy; tap water; tobacco; xylem
Abstract:
... Xylella fastidiosa is a xylem-limited plant pathogenic bacterium that causes disease in many crops worldwide. Copper (Cu) is an antimicrobial agent widely used on X. fastidiosa hosts to control other diseases. Although the effects of Cu for control of foliar pathogens are well known, it is less studied on xylem-colonizing pathogens. Previous results from our group showed that low concentrations of ...
DOI:
10.1094/PDIS-08-19-1748-RE

13. Cover Crop Rotation Effects on Growth and Development, Seedling Disease, and Yield of Corn and Soybean

Author:
Acharya, Jyotsna; Moorman, Thomas B.; Kaspar, Thomas C.; Lenssen, Andrew W.; Robertson, Alison E.
Source:
Plant disease 2020 v.104 no.3 pp. 677-687
ISSN:
0191-2917
Subject:
Camelina sativa; Glycine max; Pythium; Secale cereale; Zea mays; corn; cover crops; crop rotation; crop yield; field experimentation; root diseases; roots; rye; seedling diseases; seedling growth; seedlings; soybeans; spring
Abstract:
... The effects of winter cover crops on root disease and growth of corn and soybeans are poorly understood. A 3-year field experiment investigated the effect of winter cereal rye (Secale cereale L.) and winter camelina (Camelina sativa [L.] Crantz), used either in all three years or in rotation with each other, on corn (Zea mays L.) and soybean (Glycine max. [L.] Merr.) growth, root disease, and yiel ...
Handle:
10113/6854609
DOI:
10.1094/PDIS-09-19-1904-RE

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

Author:
Ristaino, Jean B.; Saville, Amanda C.; Paul, Rajesh; Cooper, Donald C.; Wei, Qingshan
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

15. Ecological Status of Juglans cinerea in New Brunswick

Author:
Williams, Martin; Moise, Eric R. D.; Forbes, Kathleen; Williams, Charlene; DeMerchant, Ian; Beardmore, Tannis
Source:
Plant disease 2020 v.104 no.3 pp. 860-867
ISSN:
0191-2917
Subject:
Juglans cinerea; Ophiognomonia clavigignenti-juglandacearum; dieback; disease occurrence; ex situ conservation; fungi; genome; introduced species; landscapes; nuts; pathogens; plant improvement; surveys; tree health; trees; New Brunswick
Abstract:
... Butternut (Juglans cinerea L.), an early successional riparian hardwood species native to Canada and the United States, is under serious threat from a nonnative fungal pathogen, Ophiognomonia clavigignenti-juglandacearum. Since it was first reported in Canada in 1990, this fungal pathogen has spread rapidly and established in New Brunswick in 1997. Apart from the first report in 1997 and another i ...
DOI:
10.1094/PDIS-06-19-1177-RE

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

Author:
Gao, Y. Y.; Li, X. X.; He, L. F.; Li, B. X.; Mu, W.; Liu, F.
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

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

Author:
Saito, S.; Wang, F.; Xiao, C. L.
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

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

Author:
Chi, Yuan-kai; Zhao, Wei; Ye, Meng-di; Ali, Farman; Wang, Tao; Qi, Ren-de
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

19. First Report of a Leaf Spot Caused by Botrytis cinerea on Peanut (Arachis hypogaea) in China

Author:
Li, S. J.; Cui, X. W.; Gao, M.; Wang, N.; Wang, Z. Y.
Source:
Plant disease 2020 v.104 no.3 pp. 982
ISSN:
0191-2917
Subject:
Arachis hypogaea; Botrytis cinerea; DNA primers; DNA-directed RNA polymerase; air drying; conidia; culture media; defoliation; disease incidence; ethanol; flowers; genes; gray mold; heat shock proteins; hosts; human health; internal transcribed spacers; leaf spot; leaves; mycelium; necrosis; pathogenicity; peanuts; plant pathogens; plant veins; pods; polymerase chain reaction; relative humidity; sclerotia; sodium hypochlorite; teleomorphs; vegetables; China
Abstract:
... Botrytis cinerea (teleomorph: Botryotinia fuckeliana) is an airborne, necrotrophic ascomycete plant pathogen, which has been reported to infect over 200 crop hosts worldwide (Boddy 2016; Kim et al. 2016). B. cinerea can cause severe damage to plants, such as gray mold on leaves or rot on fruit, both pre- and postharvest (Dean et al. 2012). In September 2015, brown, irregular-shaped lesions were ob ...
DOI:
10.1094/PDIS-08-19-1723-PDN

20. First Report of a Leaf Spot Disease Caused by Alternaria protenta on the Datura stramonium in Serbia

Author:
Blagojević, J.; Janjatović, S.; Ignjatov, M.; Trkulja, N.; Gašić, K.; Ivanović, Ž.
Source:
Plant disease 2020 v.104 no.3 pp. 986
ISSN:
0191-2917
Subject:
Alternaria; DNA primers; Datura stramonium; Solanum tuberosum; agar; agricultural land; annual weeds; conidia; conidiophores; crop production; economic impact; fungi; genes; greenhouses; internal transcribed spacers; invasive species; leaf spot; leaves; pathogenicity; pathogens; polymerase chain reaction; potatoes; relative humidity; sequence analysis; sodium hypochlorite; sporulation; spraying; surveys; Serbia
Abstract:
... Datura stramonium L. (jimsonweed) is an invasive and competitive annual weed and a potential reservoir host of pests and pathogens in agricultural fields. During a survey of potato growing fields in the municipality of Maglić, Vojvodina Province, typical Alternaria symptoms on leaves of D. stramonium were observed among the potato plants in September 2016. The incidence of diseased plants ranged f ...
DOI:
10.1094/PDIS-06-19-1335-PDN