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Kenney JR, Shates T, Gebiola M, Mauck KE. Hiding in Plain Sight: A Widespread Native Perennial Harbors Diverse Haplotypes of ' Candidatus Liberibacter solanacearum' and Its Potato Psyllid Vector. PHYTOPATHOLOGY 2024; 114:1554-1565. [PMID: 38602688 DOI: 10.1094/phyto-01-24-0025-r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2024]
Abstract
The unculturable bacterium 'Candidatus Liberibacter solanacearum' (CLso) is responsible for a growing number of emerging crop diseases. However, we know little about the diversity and ecology of CLso and its psyllid vectors outside of agricultural systems, which limits our ability to manage crop disease and understand the impacts this pathogen may have on wild plants in natural ecosystems. In North America, CLso is transmitted to crops by the native potato psyllid (Bactericera cockerelli). However, the geographic and host plant range of the potato psyllid and CLso beyond the borders of agriculture are not well understood. A recent study of historic herbarium specimens revealed that a unique haplotype of CLso was present infecting populations of the native perennial Solanum umbelliferum in California decades before CLso was first detected in crops. We hypothesized that this haplotype and other potentially novel CLso variants are still present in S. umbelliferum populations. To test this, we surveyed populations of S. umbelliferum in Southern California for CLso and potato psyllid vectors. We found multiple haplotypes of CLso and the potato psyllid associated with these populations, with none of these genetic variants having been previously reported in California crops. These results suggest that CLso and its psyllid vectors are much more widespread and diverse in North American natural plant communities than suggested by data collected solely from crops and weeds in agricultural fields. Further characterization of these apparently asymptomatic haplotypes will facilitate comparison with disease-causing variants and provide insights into the continued emergence and spread of CLso.
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Affiliation(s)
- Jaimie R Kenney
- Department of Entomology, University of California Riverside, Riverside, CA 92521, U.S.A
| | - Tessa Shates
- Department of Entomology, University of California Riverside, Riverside, CA 92521, U.S.A
| | - Marco Gebiola
- Department of Entomology, University of California Riverside, Riverside, CA 92521, U.S.A
- Department of Agricultural Sciences, University of Naples Federico II, 80155 Portici (NA), Italy
| | - Kerry E Mauck
- Department of Entomology, University of California Riverside, Riverside, CA 92521, U.S.A
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Dahan J, Orellana GE, Wald KB, Wenninger EJ, Cooper WR, Karasev AV. Bactericera cockerelli Picorna-like Virus and Three New Viruses Found Circulating in Populations of Potato/Tomato Psyllids ( Bactericera cockerelli). Viruses 2024; 16:415. [PMID: 38543780 PMCID: PMC10975263 DOI: 10.3390/v16030415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 02/28/2024] [Accepted: 03/06/2024] [Indexed: 04/01/2024] Open
Abstract
An investigation of viruses circulating in populations of field and laboratory potato/tomato psyllids (Bactericera cockerelli) was conducted using high-throughput sequencing (HTS) technology and conventional RT-PCR. Three new viruses were discovered: one from the family Tymoviridae and two from the family Solemoviridae. A tymo-like virus sequence represented a nearly complete 6843 nt genome of a virus named Bactericera cockerelli tymo-like virus (BcTLV) that spanned five open reading frames (ORFs) which encoded RNA-dependent RNA polymerase (RdRP), helicase, protease, methyltransferase, and a capsid protein. Phylogenetic analyses placed the RdRP of BcTLV inside a divergent lineage of the viruses from the family Tymoviridae found in insect and plant hosts in a sister clade to the genera Tymovirus, Marafivirus, and Maculavirus. Four solemo-like virus sequences were identified in the HTS outputs, representing two new viruses. One virus found only in field-collected psyllids and named Bactericera cockerelli solemo-like virus 1 (BcSLV-1) had a 5479 nt genome which spanned four ORFs encoding protease and RdRP. Three solemo-like sequences displayed 87.4-99.7% nucleotide sequence identity among themselves, representing variants or strains of the same virus named Bactericera cockerelli solemo-like virus 2 (BcSLV-2). The genome of BcSLV-2 spanned only two ORFs that encoded a protease and an RdRP. Phylogenetic analysis placed the RdRPs of BcSLV-1 and BcSLV-2 in two separate lineages as sister clades to viruses from the genus Sobemovirus found in plant hosts. All three new psyllid viruses were found circulating in psyllids collected from potato fields in southern Idaho along with a previously identified Bactericera cockerelli picorna-like virus. Any possible role of the three viruses in controlling populations of the field psyllids remains to be elucidated.
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Affiliation(s)
- Jennifer Dahan
- Department of Entomology, Plant Pathology, and Nematology, University of Idaho, 875 Perimeter Drive, MS 2329, Moscow, ID 83844-2329, USA; (J.D.); (G.E.O.); (K.B.W.)
| | - Gardenia E. Orellana
- Department of Entomology, Plant Pathology, and Nematology, University of Idaho, 875 Perimeter Drive, MS 2329, Moscow, ID 83844-2329, USA; (J.D.); (G.E.O.); (K.B.W.)
| | - Kaleigh B. Wald
- Department of Entomology, Plant Pathology, and Nematology, University of Idaho, 875 Perimeter Drive, MS 2329, Moscow, ID 83844-2329, USA; (J.D.); (G.E.O.); (K.B.W.)
| | - Erik J. Wenninger
- Department of Entomology, Plant Pathology, and Nematology, and Kimberly Research and Extension Center, University of Idaho, Kimberly, ID 83341-5082, USA;
| | - W. Rodney Cooper
- USDA-ARS, Temperate Tree Fruit and Vegetable Research Unit, Wapato, WA 98951, USA;
| | - Alexander V. Karasev
- Department of Entomology, Plant Pathology, and Nematology, University of Idaho, 875 Perimeter Drive, MS 2329, Moscow, ID 83844-2329, USA; (J.D.); (G.E.O.); (K.B.W.)
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Wenninger EJ, Rashed A. Biology, Ecology, and Management of the Potato Psyllid, Bactericera cockerelli (Hemiptera: Triozidae), and Zebra Chip Disease in Potato. ANNUAL REVIEW OF ENTOMOLOGY 2024; 69:139-157. [PMID: 37616600 DOI: 10.1146/annurev-ento-020123-014734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/26/2023]
Abstract
The potato psyllid, Bactericera cockerelli (Šulc) (Hemiptera: Triozidae), transmits the pathogen "Candidatus liberibacter solanacearum" (Lso), the putative causal agent of zebra chip disease (ZC). ZC is a disease of potato that reduces yield and quality and has disrupted integrated pest management programs in parts of the Americas and New Zealand. Advances in our understanding of the ecological factors that influence ZC epidemiology have been accelerated by the relatively recent identification of Lso and motivated by the steady increase in ZC distribution and the potential for devastating economic losses on a global scale. Management of ZC remains heavily reliant upon insecticides, which is not sustainable from the standpoint of insecticide resistance, nontarget effects on natural enemies, and regulations that may limit such tools. This review synthesizes the literature on potato psyllids and ZC, outlining recent progress, identifying knowledge gaps, and proposing avenues for further research on this important pathosystem of potatoes.
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Affiliation(s)
- Erik J Wenninger
- Department of Entomology, Plant Pathology and Nematology, Kimberly Research & Extension Center, University of Idaho, Kimberly, Idaho, USA;
| | - Arash Rashed
- Department of Entomology, Southern Piedmont Agricultural Research & Extension Center, Virginia Tech, Blackstone, Virginia, USA;
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Delgado-Luna C, Cooper WR, Villarreal-Quintanilla JÁ, Hernández-Juárez A, Sánchez-Peña SR. Physalis virginiana as a Wild Field Host of Bactericera cockerelli (Hemiptera: Triozidae) and ' Candidatus Liberibacter solanacearum'. PLANT DISEASE 2024; 108:113-117. [PMID: 37488981 DOI: 10.1094/pdis-02-23-0350-re] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/26/2023]
Abstract
The potato/tomato psyllid, Bactericera cockerelli (Šulc), is among the most important pests of solanaceous crops as a vector of the pathogen 'Candidatus Liberibacter solanacearum' (Lso). Lso-infected psyllids often arrive in crop fields from various wild species of Solanaceae and Convolvulaceae, especially those that provide early-season hosts for the vector. Physalis species are perennial plants within the family Solanaceae with often broad geographical distributions that overlap those of B. cockerelli, yet the status of many Physalis species as hosts for B. cockerelli or Lso remains unknown. Our objective was to determine whether wild Physalis species that occur in the potato-growing region of Galeana, Nuevo León, Mexico, host B. cockerelli populations and whether they also are susceptible to Lso. Sampling was carried out in the potato-growing zone of Galeana, Nuevo León, Mexico, where unidentified Physalis spp. are common. In March to October 2021, a wild plant identified as Physalis virginiana was observed; eggs, nymphs, and adults of B. cockerelli were observed on these plants throughout the growing season, and nymphs completed development on these plants under laboratory conditions. Lso also was detected in 22 of the 93 (23.7%) wild P. virginiana plants using conventional PCR, while 13.3% of B. cockerelli adults that emerged from P. virginiana cuttings harbored the pathogen. This is the first report that P. virginiana is a host for B. cockerelli and for Lso. These results suggest that P. virginiana is a likely source of Lso-infected psyllids colonizing solanaceous crops in northeastern Mexico. The importance of P. virginiana and other wild hosts on the population dynamics of the vector and pathogen should be investigated to assist in pest management decision-making.
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Affiliation(s)
- Carolina Delgado-Luna
- Departamento de Parasitología, Universidad Autónoma Agraria Antonio Narro, Calzada Antonio Narro 1923, Buenavista, Saltillo, Coahuila 25315, Mexico
| | | | | | - Agustín Hernández-Juárez
- Departamento de Parasitología, Universidad Autónoma Agraria Antonio Narro, Calzada Antonio Narro 1923, Buenavista, Saltillo, Coahuila 25315, Mexico
| | - Sergio R Sánchez-Peña
- Departamento de Parasitología, Universidad Autónoma Agraria Antonio Narro, Calzada Antonio Narro 1923, Buenavista, Saltillo, Coahuila 25315, Mexico
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Cooper WR, Swisher Grimm KD, Angelella GM, Mustafa T. Acquisition and Transmission of ' Candidatus Liberibacter solanacearum' Differs Among Wolbachia-Infected and -Uninfected Haplotypes of Bactericera cockerelli. PLANT DISEASE 2023; 107:2440-2445. [PMID: 36691279 DOI: 10.1094/pdis-11-22-2701-re] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
'Candidatus Liberibacter solanacearum' (Lso) causes disease symptoms and economic losses in potato, tomato, and other solanaceous crops in North America. Lso is transmitted to plants by the potato psyllid, Bactericera cockerelli, which occurs as distinct haplotypes named western, central, and northwestern that differ in the presence or absence of the bacterial endosymbiont, Wolbachia. Previous work showed that all three vector haplotypes can transmit Lso, but it was not clear whether acquisition and transmission rates of Lso were equal among the haplotypes. The goal of our study was to compare Lso infection rates among psyllids of the western, central, and northwestern haplotypes. Using data collected from several years of periodic testing of Lso infection of laboratory-reared potato psyllid colonies, we showed that psyllids of the western and central haplotypes are more likely to harbor Lso than are psyllids of the northwestern haplotype. We then used greenhouse assays to demonstrate that psyllids of the northwestern haplotype are less likely to acquire and transmit Lso than those of the western haplotype. Lso infection rates corresponded with Wolbachia infection among the three psyllid haplotypes. The Wolbachia-infected central and western haplotypes were more likely to harbor and transmit Lso than the Wolbachia-free northwestern haplotype. Results demonstrate that potato psyllids of the western and central haplotypes pose a greater risk for spread of Lso in crops and suggest a pattern between infection with Lso and Wolbachia in potato psyllid.
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Affiliation(s)
- W Rodney Cooper
- USDA-ARS, Temperate Tree Fruit and Vegetable Research Unit, Wapato, WA, U.S.A
| | | | - Gina M Angelella
- USDA-ARS, Temperate Tree Fruit and Vegetable Research Unit, Wapato, WA, U.S.A
| | - Tariq Mustafa
- University of Agriculture, Faisalabad, Sub Campus Depalpur, Okara, Pakistan
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Prager SM, Cohen A, Cooper WR, Novy R, Rashed A, Wenninger EJ, Wallis C. A comprehensive review of zebra chip disease in potato and its management through breeding for resistance/tolerance to 'Candidatus Liberibacter solanacearum' and its insect vector. PEST MANAGEMENT SCIENCE 2022; 78:3731-3745. [PMID: 35415948 DOI: 10.1002/ps.6913] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 04/06/2022] [Accepted: 04/12/2022] [Indexed: 06/14/2023]
Abstract
Zebra chip disease (ZC), associated with the plant pathogenic bacterium 'Candidatus Liberibacter solanacearum' (psyllaurous) (CLso), is a major threat to global potato production. In addition to yield loss, CLso infection causes discoloration in the tubers, rendering them unmarketable. CLso is transmitted by the potato psyllid, Bactericera cockerelli (Šulc) (Hemiptera: Triozidae). ZC is managed by prophylactic insecticide applications to control the vector, which is costly and carries environmental and human health risks. Given the expense, difficulty, and unsustainability of managing vector-borne diseases with insecticides, identifying sources of resistance to CLso and developing varieties that are resistant or tolerant to CLso and/or potato psyllids has become a major goal of breeding efforts. These efforts include field and laboratory evaluations of noncultivated germplasm and cultivars, studies of tubers in cold storage, detailed quantifications of biochemical responses to infection with CLso, possible mechanisms underlying insect resistance, and traditional examination of potato quality following infections. This review provides a brief history of ZC and potato psyllid, a summary of currently available tools to manage ZC, and a comprehensive review of breeding efforts for ZC and potato psyllid management within the greater context of Integrated Pest Management (IPM) strategies. © 2022 Society of Chemical Industry. This article has been contributed to by U.S. Government employees and their work is in the public domain in the USA.
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Affiliation(s)
- Sean M Prager
- Department of Plant Sciences, University of Saskatchewan, Saskatoon, Canada
| | - Abigail Cohen
- Department of Plant Sciences, University of Saskatchewan, Saskatoon, Canada
| | - W Rodney Cooper
- US Department of Agricultural, Agricultural Research Service, Temperate Tree Fruit and Vegetable Research Unit, Wapato, WA, USA
| | - Richard Novy
- US Department of Agricultural, Agricultural Research Service, Small Grains and Potato Germplasm Research, Aberdeen, ID, USA
| | - Arash Rashed
- Department of Entomology, Plant Pathology & Nematology, University of Idaho, Moscow, ID, USA
| | - Erik J Wenninger
- Department of Entomology, Plant Pathology & Nematology, Kimberly Research & Extension Center, University of Idaho, Kimberly, ID, USA
| | - Christopher Wallis
- US Department of Agricultural, Agricultural Research Service, San Joaquin Agricultural Sciences Center, Crop Diseases, Pests and Genetics Research Unit, Parlier, CA, USA
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Cooper WR, Horton DR, Swisher-Grimm K, Krey K, Wildung MR. Bacterial Endosymbionts of Bactericera maculipennis and Three Mitochondrial Haplotypes of B. cockerelli (Hemiptera: Psylloidea: Triozidae). ENVIRONMENTAL ENTOMOLOGY 2022; 51:94-107. [PMID: 34864906 DOI: 10.1093/ee/nvab133] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Indexed: 06/13/2023]
Abstract
Insects harbor bacterial endosymbionts that provide their hosts with nutritional benefit or with protection against natural enemies, plant defenses, insecticides, or abiotic stresses. We used directed sequencing of 16S rDNA to identify and compare endosymbionts of Bactericera maculipennis (Crawford) and the western, central, and northwestern haplotypes of B. cockerelli (Šulc) (Hemiptera: Psylloidea: Triozidae). Both species are native to North America, are known to harbor the plant pathogen 'Candidatus Liberibacter solanacearum' and develop on shared host plants within the Convolvulaceae. The Old-World species Heterotrioza chenopodii (Reuter) (Psylloidea: Triozidae), now found in North America, was included as an outgroup. 16S sequencing confirmed that both Bactericera species harbor 'Candidatus Liberibacter solanacearum' and revealed that both species harbor unique strains of Wolbachia and Sodalis. However, the presence of Wolbachia and Sodalis varied among haplotypes of B. cockerelli. The central and western haplotypes harbored the same strains of Wolbachia, which was confirmed by Sanger sequencing of the wsp and ftsZ genes. Wolbachia was also detected in very low abundance from the northwestern haplotype by high-throughput sequencing of 16S but was not detected from this haplotype by PCR screening. The northwestern and central haplotypes also harbored Sodalis, which was not detected in the western haplotype. Heterotrioza chenopodii harbored an entirely different community of potential endosymbionts compared with the Bactericera spp. that included Rickettsia and an unidentified bacterium in the Enterobacteriaceae. Results of this study provide a foundation for further research on the interactions between psyllids and their bacterial endosymbionts.
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Affiliation(s)
- W Rodney Cooper
- Temperate Tree Fruit and Vegetable Research Unit, USDA-ARS, 5230 Konnowac Pass Road, Wapato, WA 98951, USA
| | - David R Horton
- Temperate Tree Fruit and Vegetable Research Unit, USDA-ARS, 5230 Konnowac Pass Road, Wapato, WA 98951, USA
| | - Kylie Swisher-Grimm
- Temperate Tree Fruit and Vegetable Research Unit, USDA-ARS, Prosser, WA 99350, USA
| | - Karol Krey
- Temperate Tree Fruit and Vegetable Research Unit, USDA-ARS, 5230 Konnowac Pass Road, Wapato, WA 98951, USA
| | - Mark R Wildung
- Laboratory for Bioinformatics and Bioanalysis, Washington State University, Pullman, WA 99164, USA
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Reyes Corral CA, Cooper WR, Horton D, Miliczky E, Riebe J, Waters T, Wildung M, Karasev AV. Association of Bactericera cockerelli (Hemiptera: Triozidae) With the Perennial Weed Physalis longifolia (Solanales: Solanaceae) in the Potato-Growing Regions of Western Idaho. ENVIRONMENTAL ENTOMOLOGY 2021; 50:1416-1424. [PMID: 34392334 DOI: 10.1093/ee/nvab076] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Indexed: 06/13/2023]
Abstract
The potato psyllid, Bactericera cockerelli (Šulc), is a major pest of potato (Solanales: Solanaceae) as a vector of 'Candidatus Liberibacter solanacearum' (Lso). Bactericera cockerelli colonizes potato from noncrop host plants, yet we do not yet know which noncrop species are the primary sources of Lso-infected psyllids. The perennial weed, Physalis longifolia Nutt., is a high-quality host for B. cockerelli and Lso under laboratory conditions but has been overlooked in recent field studies as a source of Lso-infected psyllids. Our current study had four objectives: 1) determine whether P. longifolia is abundant in potato-growing regions of Washington and Idaho, 2) determine whether stands of P. longifolia harbor B. cockerelli and Lso, 3) identify the psyllid haplotypes occurring on P. longifolia, and 4) use molecular gut content analysis to infer which plant species the psyllids had previously fed upon prior to their capture from P. longifolia. Online herbaria and field searches revealed that P. longifolia is abundant in western Idaho and is present at low densities in the Columbia Basin of Washington. Over 200 psyllids were collected from P. longifolia stands in 2018 and 2019, confirming that B. cockerelli colonizes stands of this plant. Gut content analysis indicated that a proportion of B. cockerelli collected from P. longifolia had arrived there from potato. Confirmation that P. longifolia is abundant in certain potato-growing regions of the Pacific Northwest, and that B. cockerelli readily uses this plant, could improve models to predict the risk of future psyllid and Lso outbreaks.
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Affiliation(s)
- Cesar A Reyes Corral
- Department of Entomology, Plant Pathology and Nematology, University of Idaho, Moscow, ID 83844, USA
- Tree Fruit Research and Extension Center, Washington State University, 110 N. Western Avenue, Wenatchee, WA 98801, USA
| | - W Rodney Cooper
- USDA-ARS, Temperate Tree Fruit and Vegetable Research Unit, 5230 Konnowac Pass Road, Wapato, WA 98951, USA
| | - David Horton
- USDA-ARS, Temperate Tree Fruit and Vegetable Research Unit, 5230 Konnowac Pass Road, Wapato, WA 98951, USA
| | - Eugene Miliczky
- USDA-ARS, Temperate Tree Fruit and Vegetable Research Unit, 5230 Konnowac Pass Road, Wapato, WA 98951, USA
| | | | - Timothy Waters
- Washington State University Extension, Pasco, WA 99301, USA
| | - Mark Wildung
- Laboratory of Biotechnology and Bioanalysis, Washington State University, Pullman, WA 99164, USA
| | - Alexander V Karasev
- Department of Entomology, Plant Pathology and Nematology, University of Idaho, Moscow, ID 83844, USA
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Reyes-Corral CA, Cooper WR, Karasev AV, Delgado-Luna C, Sanchez-Peña SR. ' Candidatus Liberibacter solanacearum' Infection of Physalis ixocarpa Brot. (Solanales: Solanaceae) in Saltillo, Mexico. PLANT DISEASE 2021; 105:2560-2566. [PMID: 33455443 DOI: 10.1094/pdis-10-20-2240-re] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The potato psyllid Bactericera cockerelli (Šulc) (Hemiptera: Triozidae) is a pest of solanaceous crops (order Solanales), including potato (Solanum tuberosum L.) and tomato (S. lycopersicum L.). Feeding by high populations of nymphs causes psyllid yellows while adults and nymphs are vectors of the plant pathogen 'Candidatus Liberibacter solanacearum'. Foliar symptoms that were consistent with either 'Ca. L. solanacearum' infection or psyllid yellows were observed in 2019 on tomatillo (Physalis ixocarpa Brot.; family Solanaceae) grown within an experimental plot located near Saltillo, Mexico. This study had three primary objectives: 9i) determine whether the foliar symptoms observed on tomatillo were associated with 'Ca. L. solanacearum' infection, (ii) identify the haplotypes of 'Ca. L. solanacearum' and potato psyllids present in the symptomatic plot, and (iii) use gut content analysis to infer the plant sources of 'Ca. L. solanacearum'-infected psyllids. Results confirmed that 71% of symptomatic plants and 71% of psyllids collected from the plants were infected with 'Ca. L. solanacearum'. The detection of 'Ca. L. solanacearum' in plants and psyllids and the lack of nymphal populations associated with psyllid yellows strongly suggests that the observed foliar symptoms were caused by 'Ca. L. solanacearum' infection. All infected plants and insects harbored the more virulent 'Ca. L. solanacearum' haplotype B but one psyllid was also coinfected with haplotype A. The potato psyllids were predominantly of the central haplotype but one psyllid was identified as the western haplotype. Molecular gut content analysis of psyllids confirmed the movement of psyllids between noncrop habitats and tomatillo and indicated that 'Ca. L. solanacearum' infection of psyllids was associated with increased plant diversity in their diet.
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Affiliation(s)
- Cesar A Reyes-Corral
- Department of Entomology, Plant Pathology and Nematology, University of Idaho, Moscow, ID 83844, U.S.A
- United States Department of Agriculture-Agricultural Research Service, Temperate Tree Fruit and Vegetable Research Unit, Wapato, WA 98951, U.S.A
| | - W Rodney Cooper
- United States Department of Agriculture-Agricultural Research Service, Temperate Tree Fruit and Vegetable Research Unit, Wapato, WA 98951, U.S.A
| | - Alexander V Karasev
- Department of Entomology, Plant Pathology and Nematology, University of Idaho, Moscow, ID 83844, U.S.A
| | - Carolina Delgado-Luna
- Departamento de Parasitología, Universidad Autónoma Agraria Antonio Narro, Saltillo, Coahuila, 25315 Mexico
| | - Sergio R Sanchez-Peña
- Departamento de Parasitología, Universidad Autónoma Agraria Antonio Narro, Saltillo, Coahuila, 25315 Mexico
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Dahan J, Wenninger EJ, Thornton M, Corral CAR, Olsen N, Karasev AV. Haplotyping the Potato Psyllid (Hemiptera: Triozidae) and the Associated Pathogenic Bacterium 'Candidatus Liberibacter solanacearum' in Non-crop Alternative Hosts in Southern Idaho. ENVIRONMENTAL ENTOMOLOGY 2021; 50:382-389. [PMID: 33439964 DOI: 10.1093/ee/nvaa179] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Indexed: 06/12/2023]
Abstract
Zebra chip, is a potato disease associated with the bacterium 'Candidatus Liberibacter solanacearum' (Lso) and vectored by the potato psyllid, Bactericera cockerelli Šulc. Potato psyllids are native to North America, where four haplotypes have been described. They are able to colonize a wide range of solanaceous species, crops, and weeds. The epidemiology of zebra chip disease is still poorly understood and might involve the different haplotypes of psyllids as well as two haplotypes of Lso. As several perennial weeds have been recognized as potential host for potato psyllids and Lso, a yearly monitoring of several patches of bittersweet nightshade (Solanum dulcamara) and field bindweed (Convolvulus arvensis) located in the potato-growing region of southern Idaho was conducted from 2013 to 2017, to gain insight into psyllid dynamics in non-potato hosts and Lso presence in the fields. Potato psyllids caught on each host were individually tested for Lso, and a subset were haplotyped based on the CO1 gene, along with the haplotyping of Lso in positive samples. On bittersweet nightshade, the Northwestern haplotype was numerically dominant, with around 2.7% of psyllids found to be carrying either Lso haplotype A or B, suggesting a limited role in zebra chip persistence, which has infected Idaho fields at a low occurrence since the 2012 outbreak. Field bindweed was found to be a transient, non-overwintering host for potato psyllid of Northwestern, Western and Central haplotypes late in the season, suggesting minor, if any, role in persistence of Lso and field infestation by potato psyllids.
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Affiliation(s)
- Jennifer Dahan
- Department of Entomology, Plant Pathology, and Nematology, University of Idaho, Moscow, ID
| | - Erik J Wenninger
- Department of Entomology, Plant Pathology, and Nematology, and Kimberly Research and Extension Center, University of Idaho, Kimberly, ID
| | - Michael Thornton
- Department of Plant Sciences and Parma Research and Extension Center, University of Idaho, Parma, ID
| | - César A Reyes Corral
- Department of Entomology, Plant Pathology, and Nematology, University of Idaho, Moscow, ID
| | - Nora Olsen
- Department of Plant Sciences and Kimberly Research and Extension Center, University of Idaho, Kimberly, ID
| | - Alexander V Karasev
- Department of Entomology, Plant Pathology, and Nematology, University of Idaho, Moscow, ID
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