<i>Meloidogyne enterolobii</i> Found Infecting Root-Knot Nematode Resistant Sweetpotato in South Carolina, United States

Rutter, William B.; Skantar, Andrea M.; Handoo, Zafar A.; Mueller, John; Aultman, Stephen; Agudelo, Paula

doi:10.1094/pdis-08-18-1388-pdn

Cited by 47 publications

(13 citation statements)

References 4 publications

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“…Additionally, moving forward, tobacco growers in the southeastern United States face a new, highly destructive, polyphagous nematode threat in the form of M. enterolobii . This nematode, which has recently been found on root-knot resistant sweet potato in South Carolina ( Rutter et al, 2019 ) and is present in at least eight counties in North Carolina ( Schwartz, 2019 ) is a quarantine-level pathogen ( Thiessen, 2018 ) that, while not yet known to be directly impacting tobacco growers, presents a potentially serious threat, as this nematode is not controlled by available forms of resistance including Mi and Rk -mediated resistance ( Ye, 2018 ). Perhaps exploiting N. repanda germplasm, which has long been a source of novel traits for cultivated tobaccos ( Stavely et al, 1973 ) could present solutions to these and other issues facing tobacco breeders and growers alike.…”

Section: Discussionmentioning

confidence: 99%

Reproduction of Meloidogyne arenaria race 2 on flue-cured tobacco with putative resistance derived from Nicotiana repanda

Adamo

Johnson

Reed

et al. 2021

Journal of Nematology

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Chemical controls for root-knot nematodes are increasingly restricted due to environmental and human health concerns. Host resistance to these nematodes is key to flue-cured tobacco production in Virginia. Resistance to Meloidogyne incognita races 1 and 3, and race 1 of M. arenaria is imparted by the gene Rk1, which is widely available in commercial flue-cured tobacco. Rk2 imparts increased resistance to M. javanica when stacked with Rk1 and is becoming commercially available. The efficacy of Rk2 against M. arenaria race 2, which is increasingly prevalent in Virginia, is unclear. Greenhouse trials were conducted in 2017 to determine how potential resistance derived from N. repanda compares to the root-knot nematode resistance afforded by Rk1 and Rk2. Trials were arranged in a completely randomized block design and included an entry with traits derived from N. repanda, a susceptible entry and entries possessing Rk1 and/or Rk2. Data collected after 60 days included percent root galling, egg mass counts, and egg counts. Root galling and reproduction were significantly lower on the entry possessing traits derived from N. repanda relative to other entries, suggesting that the N. repanda species may hold a novel source of root-knot nematode resistance for commercial flue-cured tobacco cultivars.

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Section: Discussionmentioning

confidence: 99%

Reproduction of Meloidogyne arenaria race 2 on flue-cured tobacco with putative resistance derived from Nicotiana repanda

Adamo

Johnson

Reed

et al. 2021

Journal of Nematology

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“…Meloidogyne enterolobii (Guava RKN) is a recent emerging and highly pathogenic RKN species in the USA. It was originally described from China in 1983 53 and later reported in Florida in 2004 54 , North Carolina in 2013 55 , Louisiana in 2019 56 and South Carolina in 2019 57 attacking field crops, vegetables, ornamental plants, guava tree and weeds. Meloidogyne enterolobii is considered as a tropical species; due to its limited distribution and high damage impact, it was added to the European and Mediterranean Plant Protection Organization A2 Alert list 58 and became a regulated nematode in South Korea, Costa Rica and USA (Florida, Louisiana, Mississippi, North Carolina) 54–60 .…”

Section: Discussionmentioning

confidence: 99%

Molecular characterization of root-knot nematodes (Meloidogyne spp.) from Arkansas, USA

Robbins

Kirkpatrick

2019

Sci Rep

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Root-knot nematodes (Meloidogyne spp.) are the most common major pathogens of many crops throughout the world, impacting both the quantity and quality of marketable yields. In this study, a total of 244 root-knot nematode populations from various hosts from 39 counties in Arkansas were tested to determine the species diversity. Molecular characterization was performed on these populations by DNA sequencing of the ribosomal DNA 18S-ITS-5.8S, 28S D2/D3 and a mitochondrial DNA fragment flanking cytochrome oxidase gene subunit II - the intergenic spacer. Five species were identified, including M. incognita (Kofoid & White, 1919) Chitwood, 1949 from soybean, cotton, corn and various vegetables (232 samples); M. hapla Chitwood, 1949 from rose (1 sample); M. haplanaria Eisenback, Bernard, Starr, Lee & Tomaszewski, 2003 from okra, tomato, peanut, Indian hawthorn, ash, willow and elm trees (7 samples); M. marylandi Jepson & Golden in Jepson, 1987 from grasses (3 samples); and M. partityla Kleynhans, 1986 from pecan (1 sample) through a combined analysis of DNA sequencing and PCR by species-specific primers. Meloidogyne incognita is the most abundant species that was identified in 95% samples and was the only species in field crops including soybean and cotton, except for one population of M. haplanaria from soybean in Logan County (TK201). Species-specific primers were used to verify M. incognita through PCR by species-specific primers. Unlike historical data, M. arenaria, M. javanica and M. graminis were not detected from any of the samples collected during this study. This result is essential for effective and sustainable management strategies against root-knot nematodes in Arkansas.

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“…In the United States, M. enterolobii was first reported in Puerto Rico in 1988 and Florida in 2001 ( Brito et al, 2004 ; Da Silva and Santos, 2016 ). It has since spread and has been reported in North and South Carolina ( Rutter et al, 2019 ). In North Carolina, samples were originally collected and M. enterolobii was identified in 2011, but was not reported until 2013 ( Ye et al, 2013 ).…”

Section: Host Range and Geographic Distributionmentioning

confidence: 99%

Meloidogyne enterolobii, a Major Threat to Tomato Production: Current Status and Future Prospects for Its Management

et al. 2020

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The guava root-knot nematode, Meloidogyne enterolobii (Syn. M. mayaguensis ), is an emerging pathogen to many crops in the world. This nematode can cause chlorosis, stunting, and reduce yields associated with the induction of many root galls on host plants. Recently, this pathogen has been considered as a global threat for tomato ( Solanum lycopersicum L.) production due to the lack of known resistance in commercially accepted varieties and the aggressiveness of M. enterolobii . Both conventional morphological and molecular approaches have been used to identify M. enterolobii , an important first step in an integrated management. To combat root-knot nematodes, integrated disease management strategies such as crop rotation, field sanitation, biocontrol agents, fumigants, and resistant cultivars have been developed and successfully used in the past. However, the resistance in tomato varieties mediated by known Mi- genes does not control M. enterolobii . Here, we review the current knowledge on geographic distribution, host range, population biology, control measures, and proposed future strategies to improve M. enterolobii control in tomato.

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Meloidogyne enterolobii Found Infecting Root-Knot Nematode Resistant Sweetpotato in South Carolina, United States

Cited by 47 publications

References 4 publications

Reproduction of Meloidogyne arenaria race 2 on flue-cured tobacco with putative resistance derived from Nicotiana repanda

Reproduction of Meloidogyne arenaria race 2 on flue-cured tobacco with putative resistance derived from Nicotiana repanda

Molecular characterization of root-knot nematodes (Meloidogyne spp.) from Arkansas, USA

Meloidogyne enterolobii, a Major Threat to Tomato Production: Current Status and Future Prospects for Its Management

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