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You searched for: Journal Plant disease Remove constraint Journal: Plant disease Publication year rev 7979-2021 Remove constraint Publication year rev: 7979-2021 Source 2021 v.105 no.4 Remove constraint Source: 2021 v.105 no.4
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1. A Fig Deal: A Global Look at Fig Mosaic Disease and its Putative Associates

Author:
Stephanie Preising; Darlan Ferreira Borges; Márcia Michelle de Queiroz Ambrósio; Washington Luís da Silva
Source:
Plant disease 2021 v.105 no.4 pp. 727-738
ISSN:
0191-2917
Subject:
Aceria; Ficus carica; Fig badnavirus 1; Fig mosaic emaravirus; chlorosis; deformation; figs; genome; mites; nucleotide sequences; phenotype; synergism; vegetative propagation; viral load; viroids; viruses; California; Connecticut
Abstract:
... Fig mosaic disease (FMD) is a complex viral disease with which 12 viruses, including a confirmed causal agent, fig mosaic emaravirus (FMV), and three viroids are associated worldwide. FMD was first described in California in the early 1930s. Symptoms include foliar chlorosis, deformation, and mosaic patterns. FMD is disseminated by vegetative propagation, seed transmission, and vectors, including ...
DOI:
10.1094/PDIS-06-20-1352-FE

2. A Mechanistic Approach To Assessing the Potential for Cover Crops To Serve as Trap Crops for the Soybean Cyst Nematode

Author:
Chelsea J. Harbach; Elizabeth Wlezien; Gregory L. Tylka
Source:
Plant disease 2021 v.105 no.4 pp. 1136-1142
ISSN:
0191-2917
Subject:
Brassica juncea; Heterodera glycines; Lolium multiflorum; Secale cereale; Trifolium incarnatum; chemotaxis; cover crops; cultivars; greenhouses; juveniles; rapeseed; rye; soil; trap crops
Abstract:
... The effects of cover crops on the biology of the soybean cyst nematode (SCN; Heterodera glycines) are not well established. It is possible that cover crops may reduce SCN population densities by acting as trap crops. Cover crops with potential to serve as trap crops may stimulate hatching and/or attract hatched SCN juveniles and also may be penetrated by large numbers of nematodes that cannot feed ...
DOI:
10.1094/PDIS-05-20-0964-RE

3. Aphelenchoides besseyi Parasitizing Common Bean in Brazil

Author:
Luciany Favoreto; Maurício Conrado Meyer; Angélica Calandrelli; Michele Corpolato Maia da Silva; Santino Aleandro da Silva; Andressa Cristina Zamboni Machado
Source:
Plant disease 2021 v.105 no.4 pp. 748-751
ISSN:
0191-2917
Subject:
Aphelenchoides besseyi; Glycine (Fabaceae); Phaseolus vulgaris; beans; cotton; deformation; endoparasites; greenhouses; leaves; pathogenicity; soybeans; Brazil; Costa Rica
Abstract:
... Aphelenchoides besseyi is the causal agent of soybean green stem and foliar retention syndrome known as “Soja Louca II.” This nematode has recently been reported parasitizing cotton in Brazil. In Costa Rica, it causes the symptoms known as “amachamiento” and false angular spots in common bean (Phaseolus vulgaris). Due to the great importance of beans to Brazilian agriculture, the objective of this ...
DOI:
10.1094/PDIS-09-20-1991-SC

4. Biology and Management of Bacterial Spot of Peppers in Oklahoma

Author:
John Damicone; Felipe Cevallos; Mark Trent; Claudia Diaz; Brett Johnson; Zhaorigetu Hubhachen
Source:
Plant disease 2021 v.105 no.4 pp. 1129-1135
ISSN:
0191-2917
Subject:
Xanthomonas euvesicatoria; capsaicin; copper; crop rotation; cultivars; hybrids; pathogen survival; plant genetics; sweet peppers; virulence; Oklahoma
Abstract:
... Bacterial spot, an important disease of bell and chili peppers grown in Oklahoma, is caused by Xanthomonas euvesicatoria. We evaluated isolates from 1995 to 2015 (n = 72) for avirulence alleles and race by assessing hypersensitive responses (HRs) on differentials with resistance genes Bs1, Bs2, Bs3, or Bs4. Most isolates (96%) expressed AvrBs2 (races 1, 3, 7, 8), and only three were virulent on Bs ...
DOI:
10.1094/PDIS-05-20-0926-RE

5. Combined Use of PGPRs and Reduced Rates of Azoxystrobin to Improve Management of Sheath Blight of Rice

Author:
Xin-Gen Zhou; K. Vijay Krishna Kumar; Linda W. Zhou; M. S. Reddy; Joseph W. Kloepper
Source:
Plant disease 2021 v.105 no.4 pp. 1034-1041
ISSN:
0191-2917
Subject:
Bacillus subtilis; Thanatephorus cucumeris; application rate; azoxystrobin; booting stage; dose response; field experimentation; grain yield; greenhouses; leaf blight; models; plant growth-promoting rhizobacteria; rice
Abstract:
... Farmers rely heavily on the use of strobilurin fungicides to manage sheath blight (ShB) caused by Rhizoctonia solani AG1-IA, the most important disease in rice in the southern United States. Greenhouse and field studies were conducted to evaluate the potential use of plant growth–promoting rhizobacteria (PGPRs) in combination with a reduced rate of azoxystrobin application as a strategy to improve ...
DOI:
10.1094/PDIS-07-20-1596-RE

6. Complete Genome Sequence Resource for the Necrotrophic Plant-Pathogenic Bacterium Dickeya dianthicola 67-19 Isolated From New Guinea Impatiens

Author:
Yingyu Liu; Tyler C. Helmann; Paul Stodghill; Melanie J. Filiatrault
Source:
Plant disease 2021 v.105 no.4 pp. 1174-1176
ISSN:
0191-2917
Subject:
Dickeya; Impatiens hawkeri; disease control; genome; genomics; nanopores; nucleotide sequences; plant pathogenic bacteria
Abstract:
... New Guinea impatiens (NGI, Impatiens hawkeri) are popular bedding plants that can be affected by a number of pathogens. Using 16S rDNA sequencing and genus-specific PCR, we identified the first Dickeya dianthicola strain isolated from NGI presented with blackleg symptoms, herein designated as D. dianthicola 67-19. Here, we report a high-quality complete and annotated genome sequence of D. dianthic ...
DOI:
10.1094/PDIS-09-20-1968-A

7. Cucurbit Leaf Crumple Virus Associated to Watermelon Disease in Campeche State, Mexico

Author:
E. A. Rodríguez-Negrete; R. Jordan-Ramírez; N. E. Leyva-López; J. Méndez-Lozano
Source:
Plant disease 2021 v.105 no.4 pp. 1235
ISSN:
0191-2917
Subject:
Aleyrodidae; Citrullus lanatus; Cucurbit leaf crumple virus; Melon chlorotic leaf curl virus; RNA; Squash leaf curl virus; Watermelon chlorotic stunt virus; agroinfiltration; cantaloupes; circular DNA; cucumbers; genome; leaves; mixed infection; necrosis; pumpkins; reverse transcriptase polymerase chain reaction; sequence analysis; squashes; viruses; watermelons; Arizona; California; Central America; Florida; Georgia; Mexico; South Carolina; Texas
Abstract:
... An annual recurrent disease causing yield reduction in cultivated watermelon (Citrullus lanatus) was documented by the growers in different farms of Campeche state, Mexico. In April 2019 and March 2020, open field grown watermelon plants showed symptoms such as leaf curling, crumpling, and leaf basal or apical necrosis, with an incidence ranging from 30 up to 80%. These plants also presented high ...
DOI:
10.1094/PDIS-12-20-2551-PDN

8. Cultivar Susceptibility and Environmental Parameters Affecting Symptom Expression of Red Leaf Blotch of Almond in Spain

Author:
Xavier Miarnau; Lourdes Zazurca; Laura Torguet; Erick Zúñiga; Ignasi Batlle; Simó Alegre; Jordi Luque
Source:
Plant disease 2021 v.105 no.4 pp. 940-947
ISSN:
0191-2917
Subject:
Polystigma; almonds; cultivars; disease control; disease incidence; foliar diseases; fungicide application; fungicides; leaf blotch; orchards; rain; spring; summer; trees; Mediterranean region; Middle East; Spain
Abstract:
... Red leaf blotch (RLB) of almond, caused by Polystigma amygdalinum, is an important foliar disease of this nut tree in the Mediterranean basin and Middle East regions. In recent years, the incidence of this disease has increased in Spain, corresponding to increases in the area of newly planted orchards and the use of susceptible cultivars. In 2009, an experimental orchard including 21 almond cultiv ...
DOI:
10.1094/PDIS-04-20-0869-RE

9. Detection of Fusarium oxysporum f. sp. fragariae by Using Loop-Mediated Isothermal Amplification

Author:
Hiroshi Katoh; Shuichiro Yamazaki; Takashi Fukuda; Shoji Sonoda; Hisashi Nishigawa; Tomohide Natsuaki
Source:
Plant disease 2021 v.105 no.4 pp. 1072-1079
ISSN:
0191-2917
Subject:
DNA; Fusarium oxysporum; carrier state; conidia; detection limit; fungi; gel electrophoresis; genomics; loop-mediated isothermal amplification; selective media; soil; strawberries; temperature; California
Abstract:
... We developed a loop-mediated isothermal amplification (LAMP) assay for detecting Fusarium oxysporum f. sp. fragariae, the causal agent of wilt in strawberry plants. This assay was based on genomic regions between the portions of transposable elements Han and Skippy of the fungus. The LAMP assay allowed the efficient detection of F. oxysporum f. sp. fragariae DNA by visual inspection, without requi ...
DOI:
10.1094/PDIS-03-20-0590-RE

10. Development and Application of a LAMP Assay for the Detection of the Latent Apple Tree Pathogen Valsa mali

Author:
Liangsheng Xu; Yibo Wang; Shan Zhu; Jianyu Li; Yali Chang; Lili Huang
Source:
Plant disease 2021 v.105 no.4 pp. 1065-1071
ISSN:
0191-2917
Subject:
DNA; Valsa mali; apples; byproducts; color; death; diagnostic techniques; dyes; equipment; latent period; loop-mediated isothermal amplification; magnesium; pathogens
Abstract:
... Valsa mali, the causal agent of apple Valsa canker, produces cankers, resulting in the death of infected tissues and eventually the entire tree. Because of the long latent period of the disease, it is necessary to develop a rapid, sensitive, and reliable field-based assay to effectively diagnose apple Valsa canker when the plant is still symptomless. Loop-mediated isothermal amplification (LAMP) i ...
DOI:
10.1094/PDIS-07-20-1449-RE

11. Development of Boscalid Resistance in Botrytis cinerea and an Efficient Strategy for Resistance Management

Author:
Kaidi Cui; Leiming He; Tongtong Li; Wei Mu; Feng Liu
Source:
Plant disease 2021 v.105 no.4 pp. 1042-1047
ISSN:
0191-2917
Subject:
Botrytis cinerea; boscalid; cucumbers; fruits; gray mold; median effective concentration; mutation; resistance management; succinate dehydrogenase (quinone); tomatoes; topical application; China
Abstract:
... Among succinate dehydrogenase inhibitors, only boscalid has been registered in China for controlling gray mold. In Shandong Province of China, it has been more than a decade since the first use of boscalid to control gray mold. In the current study, we monitored the resistance development process of Botrytis cinerea to boscalid, identified the mutation types that occurred in boscalid-resistant iso ...
DOI:
10.1094/PDIS-05-20-1009-RE

12. Development of High-Resolution DNA Melting Analysis for Simultaneous Detection of Potato Mop-Top Virus and Its Vector, Spongospora subterranea, in Soil

Author:
Xianzhou Nie; Mathuresh Singh; Dahu Chen; Cassandra Gilchrist; Yasmine Soqrat; Manisha Shukla; Alexa Creelman; Virginia Dickison; Bihua Nie; Jacques Lavoie; Vikram Bisht
Source:
Plant disease 2021 v.105 no.4 pp. 948-957
ISSN:
0191-2917
Subject:
DNA; Potato mop-top virus; RNA; Spongospora subterranea; bioassays; gel electrophoresis; potatoes; protists; reverse transcriptase polymerase chain reaction; soil; tobacco; New Brunswick
Abstract:
... In this study, a set of duplex reverse transcription PCR (RT-PCR)–mediated high-resolution DNA melting (HRM) analyses for simultaneous detection of potato mop-virus (PMTV) and its protist vector, Spongospora subterranea f. sp. subterranea (Sss), was developed. The infestation of soil by PMTV was detected with a tobacco-based baiting system. Total RNA extracted from the soil led to successful RT-PC ...
DOI:
10.1094/PDIS-06-20-1321-RE

13. Diversity and Cross-Infection Potential of Colletotrichum Causing Fruit Rots in Mixed-Fruit Orchards in Kentucky

Author:
Madison J. Eaton; Shanice Edwards; Harrison A. Inocencio; Franklin J. Machado; Etta M. Nuckles; Mark Farman; Nicole A. Gauthier; Lisa J. Vaillancourt
Source:
Plant disease 2021 v.105 no.4 pp. 1115-1128
ISSN:
0191-2917
Subject:
apples; barcoding; blueberries; cross infection; fruits; fungicides; genome; morphs; phylogeny; plant rots; strawberries; Kentucky
Abstract:
... Fungi in the genus Colletotrichum cause apple, blueberry, and strawberry fruit rots, which can result in significant losses. Accurate identification is important because species differ in aggressiveness, fungicide sensitivity, and other factors affecting management. Multiple Colletotrichum species can cause similar symptoms on the same host, and more than one fruit type can be infected by a single ...
DOI:
10.1094/PDIS-06-20-1273-RE

14. Draft Genome Sequence of Cumin Blight Pathogen Alternaria burnsii

Author:
Zhonghong Feng; Tom Hsiang; Xiaofei Liang; Rong Zhang; Guangyu Sun
Source:
Plant disease 2021 v.105 no.4 pp. 1165-1167
ISSN:
0191-2917
Subject:
Alternaria; Cuminum cyminum; Hansenia weberbaueriana; Phoenix dactylifera; air; blight; cumin; endophytes; fungi; genome; genomics; leaf spot; nucleotide sequences; pathogens; pumpkins; saprophytes; seed rot; soil; wheat
Abstract:
... The fungal genus Alternaria consists of highly diverse species. They can be isolated readily from soil, water, and many plants, and even from animals and humans. Alternaria burnsii is a small-spored species of section Alternaria. It has been reported as a pathogen, an endophyte, and a saprophyte, and can also be found in indoor air. It causes cumin blight, a destructive disease on cumin (Cuminum c ...
DOI:
10.1094/PDIS-02-20-0224-A

15. Dynamics of the Rice Blast Fungal Population in the Field After Deployment of an Improved Rice Variety Containing Known Resistance Genes

Author:
Wenjuan Wang; Jing Su; Kailing Chen; Jianyuan Yang; Shen Chen; Congying Wang; Aiqing Feng; Zonghua Wang; Xiaoyan Wei; Xiaoyuan Zhu; Guo-dong Lu; Bo Zhou
Source:
Plant disease 2021 v.105 no.4 pp. 919-928
ISSN:
0191-2917
Subject:
Magnaporthe oryzae; blast disease; disease resistance; disease severity; evolution; field experimentation; fungi; haplotypes; new variety; pathogens; rice; varietal resistance; virulence; China
Abstract:
... Rice blast, caused by the fungus Magnaporthe oryzae, is one of the most destructive diseases of rice worldwide. Management through the deployment of host resistance genes would be facilitated by understanding the dynamics of the pathogen’s population in the field. Here, to investigate the mechanism underlying the breakdown of disease resistance, we conducted a six-year field experiment to monitor ...
DOI:
10.1094/PDIS-06-20-1348-RE

16. Effect of 6-Methoxy-2-Benzoxazolinone (MBOA) on Pythium Species and Corn Seedling Growth and Disease

Author:
J. Acharya; T. C. Kaspar; A. E. Robertson
Source:
Plant disease 2021 v.105 no.4 pp. 752-757
ISSN:
0191-2917
Subject:
allelochemicals; allelopathy; ambient temperature; chloramphenicol; corn; cover crops; dimethyl sulfoxide; juices; mycelium; neomycin; root rot; seedling growth; seedlings; winter rye
Abstract:
... Corn yield reduction following a cereal rye cover crop has been attributed to, among other factors, allelochemicals released from decomposing cereal rye residue. The allelopathic effect of 6-methoxy-2-benzoxazolinone (MBOA) was evaluated on corn seedling growth, mycelial growth of seven pathogenic species of Pythium, and root rot of corn seedlings caused by Pythium spp. at 13, 16, and 22 to 23°C ( ...
DOI:
10.1094/PDIS-04-20-0824-SC

17. Effects of Cover Crops on Population Reduction of Soybean Cyst Nematode (Heterodera glycines)

Author:
Krishna Acharya; Guiping Yan; Addison Plaisance
Source:
Plant disease 2021 v.105 no.4 pp. 764-769
ISSN:
0191-2917
Subject:
Brassica carinata; Glycine max; Heterodera glycines; Lolium multiflorum; Melilotus officinalis; Pisum sativum subsp. sativum var. arvense; Raphanus sativus; Secale cereale; Setaria italica; Trifolium pratense; Vicia faba; eggs; faba beans; fallow; pests; population density; radishes; soil; soybeans; turnips; winter rye; North Dakota
Abstract:
... Microplot experiments were conducted to evaluate the effects of cover crops on population reduction of a major soybean pest, soybean cyst nematode (SCN; Heterodera glycines Ichinohe) in 2016 and 2017. Ten crop species, including annual ryegrass (Lolium multiflorum L.), Austrian winter pea (Pisum sativum L. subsp. arvense), carinata (Brassica carinata A. Braun), faba bean (Vicia faba Roth), foxtail ...
DOI:
10.1094/PDIS-08-20-1778-RE

18. Effects of Inoculum Density and Cultivar Susceptibility on Rhizoctonia Damping-Off and Crown and Root Rot in Sugar Beet

Author:
Jason R. Brantner; Ashok K. Chanda
Source:
Plant disease 2021 v.105 no.4 pp. 1019-1025
ISSN:
0191-2917
Subject:
Rhizoctonia; Thanatephorus cucumeris; barley; crop rotation; cultivars; damping off; fungicide application; inoculum density; root rot; stand establishment; sucrose; sugar beet; Minnesota; North Dakota
Abstract:
... Damping-off and crown and root rot of sugar beet caused by Rhizoctonia solani anastomosis group 2-2 (AG 2-2) are important soilborne diseases in Minnesota and North Dakota. Management involves an integrated approach, including crop rotation, use of resistant cultivars, and timely fungicide application. Our objectives were to evaluate the role of inoculum density and cultivar susceptibility on the ...
DOI:
10.1094/PDIS-02-20-0336-RE

19. Effects of Temperature and Moisture on Conidia Germination, Infection, and Acervulus Formation of the Apple Marssonina Leaf Blotch Pathogen (Diplocarpon mali) in China

Author:
Sen Lian; Xiang-li Dong; Ping-liang Li; Cai-xia Wang; Shan-yue Zhou; Bao-hua Li
Source:
Plant disease 2021 v.105 no.4 pp. 1057-1064
ISSN:
0191-2917
Subject:
Diplocarpon mali; acervuli (fungi); apples; conidia; defoliation; disease control; disease severity; germination; leaf blotch; leaf wetness; leaves; models; rain; temperature; China
Abstract:
... Apple Marssonina leaf blotch (AMLB; Diplocarpon mali) is a severe disease of apple that mainly causes premature leaf defoliation in many apple growing areas worldwide. AMLB epidemic development is closely related to temperature and rainfall. In this study, the effects of temperature and moisture on conidium germination, infection on leaves, and acervulus production were investigated under controll ...
DOI:
10.1094/PDIS-06-20-1180-RE

20. Etiology of Halo Blight in Michigan Hopyards

Author:
Douglas S. Higgins; Ross J. Hatlen; Jan M. Byrne; Monique L. Sakalidis; Timothy D. Miles; Mary K. Hausbeck
Source:
Plant disease 2021 v.105 no.4 pp. 859-872
ISSN:
0191-2917
Subject:
Bayesian theory; Diaporthe; acreage; blight; disease control; etiology; histones; humidity; internal transcribed spacers; leaves; necrosis; peptide elongation factors; pycnidia; rain; statistical analysis; tubulin; Michigan
Abstract:
... Michigan’s hop acreage ranks fourth nationally, but the state’s growers contend with unique disease challenges resulting from frequent rainfall and high humidity. In August 2018, a Michigan hop grower reported necrosis and blighting of foliage and shattering of cones resulting in yield loss. Irregular-shaped lesions developed on leaves, surrounded by a halo of chlorotic tissue, and cone bracts bec ...
DOI:
10.1094/PDIS-05-20-0924-RE