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Article | 21-July-2017

Mitochondrial Haplotype-based Identification of Root-knot Nematodes (Meloidogyne spp.) on Cut Foliage Crops in Florida

Florida accounts for more than 75% of the national cut foliage production. Unfortunately, root-knot nematodes (RKN) (Meloidogyne spp.) are a serious problem on these crops, rendering many farms unproductive. Currently, information on the Meloidogyne spp. occurring on most commonly cultivated cut foliage crops in Florida, and tools for their rapid identification are lacking. The objectives of this study were to (i) identify specific RKN infecting common ornamental cut foliage crops in Florida


Journal of Nematology, Volume 48 , ISSUE 3, 193–202

research-article | 06-March-2021

Effects of fluopyram and azadirachtin integration with sunn hemp on nematode communities in zucchini, tomato and sweet potato in Hawaii

of Agriculture National Agriculture Statistics Service USDA NASS, 2019). Tremendous potential for expansion exists with support for local food production systems. Improving pest and disease management strategies could further bolster yields and stimulate agribusinesses in Hawaii. Plant-parasitic nematodes are detrimental pests that adversely affect plant health and yields in fruit and vegetable crops. Of particular importance are root-knot (Meloidogyne spp.) and reniform (Rotylenchulus reniformis

Philip Waisen, Koon-Hui Wang, Jensen Uyeda, Roxana Y. Myers

Journal of Nematology, Volume 53 , 1–15

Article | 21-July-2017

Efficacy of Various Application Methods of Fluensulfone for Managing Root-knot Nematodes in Vegetables

Fluensulfone is a new nematicide in the flouroalkenyl chemical group. A field experiment was conducted in 2012 and 2013 to evaluate the efficacy of various application methods of fluensulfone for control of Meloidogyne spp. in cucumber (Cucumis sativus). Treatments of fluensulfone (3.0 kg a.i./ha) were applied either as preplant incorporation (PPI) or via different drip irrigation methods: drip without pulse irrigation (Drip NP), pulse irrigation 1 hr after treatment (Drip +1P), and treatment


Journal of Nematology, Volume 48 , ISSUE 2, 65–71

Article | 24-July-2017

Methyl Bromide Alternatives for Control of Root-knot Nematode (Meloidogyne spp.) in Tomato Production in Florida

The following work was initiated to determine the scope of application methodology and fumigant combinations for increasing efficacy of 1,3-dichloropropene (1,3-D) and metam sodium for management of root-knot nematodes (Meloidogyne spp.) in Florida. A series of five experiments were set up during spring and fall seasons to evaluate the potential of different fumigants, alone or in combination, in polyethylene film tomato production. The most promising chemical alternatives to methyl bromide, in


Journal of Nematology, Volume 49 , ISSUE 2, 140–149

research-article | 06-November-2020

Mist chamber extraction for improved diagnosis of Meloidogyne spp. from golf course bermudagrass

. Crow, unpublished data) have found M. graminis to be the most common species, although M. marylandi has also been reported (Sekora et al., 2012). These same two species are reported as the predominate Meloidogyne spp. associated with golf course bermudagrass in North and South Carolina (Zeng et al., 2012; Ye et al., 2015), Texas (Faske and Starr, 2009), and California and Hawaii (McClure et al., 2012). A typical turfgrass nematode diagnosis conducted by the University of Florida Nematode Assay

William T. Crow, Alemayehu Habteweld, Thomas Bean

Journal of Nematology, Volume 52 , 1–12

research-article | 30-November-2020

Genome sequence of the coffee root-knot nematode Meloidogyne exigua

Ngan Thi Phan, Guillaume Besnard, Rania Ouazahrou, William Solano Sánchez, Lisa Gil, Sophie Manzi, Stéphane Bellafiore

Journal of Nematology, Volume 53 , 1–6

research-article | 30-November-2018

Temporal expression patterns of Pasteuria spp. sporulation genes

devastating, polyphagous root-knot nematode Meloidogyne spp. (Srivastava et al., 2018). The endospores that do successfully germinate, grow vegetatively and sporulate in the bodies of their host (Opperman et al., 2011), significantly reducing nematode fecundity as the multiplication of endospores in the body of infected females occludes the growth and development of eggs. Bacillus subtilis is the traditional model to study the process of sporulation (Stragier and Losick, 1996). This process can be

Ruhiyyih Dyrdahl-Young, Weiming Hu, Peter DiGennaro

Journal of Nematology, Volume 51 , 1–8

research-article | 30-November-2020

First report of root-knot nematode, Meloidogyne incognita on calendula in Turkey

Plant parasitic nematodes, especially root-knot nematodes (Meloidogyne spp.), cause serious yield losses in vegetables, ornamental and medicinal plants, and horticultural crops around the world (Devran et al., 2017; Karssen et al., 2013; Pintea et al., 2003). The plantation areas of ornamental and medicinal plants in tropical and sub-tropical countries have significantly increased recently in order to be used in pharmaceutical, perfumery, cosmetic and food industries (Pandey, 2017). Calendula

Hürkan Ataş, Gülsüm Uysal, Çiğdem Gözel, Tevfik Özalp, Uğur Gözel, Zübeyir Devran

Journal of Nematology, Volume 53 , 1–5

research-article | 23-April-2019

Resistant Pepper Carrying N, Me1, and Me3 have Different Effects on Penetration and Reproduction of Four Major Meloidogyne species

Root-knot nematodes, Meloidogyne spp., are one of the most yield-limiting parasites of peppers (Capsicum annuum L.) in the USA and worldwide (Sasser and Freckman, 1987; Thies and Fery, 2000). These parasites are widely distributed across the world and are adapted to develop and reproduce on peppers in tropical and subtropical climates. Infection of peppers by Meloidogyne spp. can cause changes in the plant physiology, fruit morphology and yield. Three species of M. incognita (Kofoid & White

Abolfazl Hajihassani, William B. Rutter, Xuelin Luo

Journal of Nematology, Volume 51 , 1–9

research-article | 14-June-2021

First report of Meloidogyne incognita infecting Cannabis sativa in Alabama

Industrial hemp (Cannabis sativa L.) is a new crop for Alabama with the recent legalization and hemp acreage is increasing each year. In the first season of legal production, hemp plants (cultivar ‘Boax’ and ‘Otto2’) in a commercial field located in Geneva County, AL exhibited stunted growth, poor root development, and numerous galls typical of root-knot nematode (Meloidogyne spp.) infection. After harvest in September 2019, 75 L of soil were collected from the field in the area with

Bisho R. Lawaju, William Groover, Jessica Kelton, Kassie Conner, Edward Sikora, Kathy S. Lawrence

Journal of Nematology, Volume 53 , 1–3

research-article | 30-November-2018

Screening of Cucurbita maxima and Cucurbita moschata Genotypes for Resistance Against Meloidogyne arenaria, M. incognita, M. javanica, and M. luci

Root-knot nematodes (RKN), Meloidogyne spp., are considered one of the major plant-parasitic nematodes worldwide (Jones et al., 2013). These obligate endoparasites infect roots and cause the formation of root galls which contain the modified feeding cells known as giant cells, which serve as the exclusive source of nutrients for nematode development (Caillaud et al., 2008). Due to nematode infection of roots, plant nutrient and water uptake are substantially reduced, resulting in above-ground

Gökhan Aydınlı, Ertan Sait Kurtar, Sevilhan Mennan

journal of nematology, Volume 51 , 1–10

research-article | 30-November-2020

Announcement of WormAtlas partnership with the Journal of Nematology

Nathan E. Schroeder, David H. Hall

Journal of Nematology, Volume 53 , 1–2

research-article | 30-November-2019

Further observations on Meloidogyne enterolobii (Nematoda: Meloidogynidae) infecting guava (Psidium guajava) in India

Root-knot nematodes (RKNs, Meloidogyne spp.) are global pests comprised of more than 100 nominal species, and attack a large number of host-plants. Meloidogyne enterolobii Yang and Eisenback, 1983 is an aggressive RKN species with high reproduction potential that infects a wide range of hosts (Brito et al., 2004). Originally, Yang and Eisenback (1983) described M. enterolobii infecting Pacara earpod trees (Enterolobium contortisiliquum (Vell.) Morong) from Hainan Island of China. Subsequently

Tushar Manohar Ghule, Victor Phani, Vishal Singh Somvanshi, Maya Patil, Somnath Bhattacharyya, Matiyar Rahaman Khan

Journal of Nematology, Volume 52 , 1–9

research-article | 06-November-2020

The potential of eugenol as a nematicidal agent against Meloidogyne javanica (Treub) Chitwood

Root-knot nematodes (RKN; Meloidogyne spp.) cause economic damage to a wide range of economically important open field and greenhouse vegetable crops and are considered one of the most damaging agricultural pests worldwide. The genus Meloidogyne has an extremely broad host range of over 2000 plant species, which can cause significant yield losses (Chitwood, 2003; Bleve-Zacheo et al., 2007). The control of nematodes has become increasingly difficult due to many reasons. Many nematicides and soil

Eleni Nasiou, Ioannis O. Giannakou

Journal of Nematology, Volume 52 , 1–10

Article | 21-July-2017

Acetic Acid, 2-Undecanone, and (E)-2-Decenal Ultrastructural Malformations on Meloidogyne incognita

The use of natural compounds to control phytonematodes is significantly increasing, as most of the old synthetic pesticides have been banned due to their eco-hostile character. Plant secondary metabolites are now evaluated as biologically active molecules against Meloidogyne spp. but their target site in the nematode body is rarely specified.Herein, we report on the ultrastructure modifications of the Meloidogyne incognita J2 after treatment with nematicidal plant secondary


Journal of Nematology, Volume 48 , ISSUE 4, 248–260

research-article | 30-November-2019

Biological control of Meloidogyne spp. in glasshouse-grown chrysanthemum

Root-knot nematodes (RKN; Meloidogyne spp.) are a worldwide problem in the cultivation of both fruit and vegetable crops (Jones et al., 2013). There are approximately 100 different species of Meloidogyne (with new species being described often) (Jones et al., 2013) and specific species or “races” usually parasitize only a select range of host plants (Moens et al., 2009). The life cycle of RKN lasts approximately 30 days, depending on species and environmental conditions (Ploeg and Maris, 1999

J. R. De Long, M. A. Streminska, A. Persijn, H. M. I. Huisman, C. van der Salm

Journal of Nematology, Volume 52 , 1–12

research-article | 30-November-2020

Meloidogyne enterolobii egg extraction in NaOCl versus infectivity of inoculum on cucumber

different (p > 0.05) by Fisher’s least significant difference (LSD) test. Discussion To extract eggs of Meloidogyne spp., the galled roots can be directly treated with sodium hypochlorite via shaking, grinding or stirring to release the eggs from the gelatinous matrix attached to the root surface (Stetina et al., 1997). However, NaOCl potentially damages the egg structure upon contact. Consequently, NaOCl is also potentially detrimental to the larvae. Reduced viability of eggs extracted with NaOCl

Guillermo Gómez-González, Isabel Cruz-Lachica, Isidro Márquez-Zequera, José Benigno Valdez-Torres, Juan Manuel Tovar-Pedraza, Luis Alfredo Osuna-García, Raymundo Saúl García-Estrada

Journal of Nematology, Volume 53 , 1–8

Research Article | 03-December-2018

Broad-based root-knot nematode resistance identified in cowpea gene-pool two

Arsenio D. Ndeve, William C. Matthews, Jansen R. P. Santos, Bao Lam Huynh, Philip A. Roberts

Journal of Nematology, Volume 50 , ISSUE 4, 545–558

Original Research | 18-July-2017

Diversity of Root-knot Nematodes Associated with Tubers of Yam (Dioscorea spp.) Established Using Isozyme Analysis and Mitochondrial DNA-based Identification

Abstract The root-knot nematodes (RKN), Meloidogyne spp., represent an important threat to yam (Dioscorea spp.) production in West Africa. With the aim to establish the diversity of RKN species affecting yam tubers, for control and resistance screening purposes, surveys were conducted in the main yam producing areas of Nigeria. Galled tubers (N = 48) were collected from farmers’ stores and markets in nine states in Nigeria and in one district in Ghana. RKN isolated from yam tubers were

Yao A. Kolombia, Gerrit Karssen, Nicole Viaene, P. Lava Kumar, Nancy de Sutter, Lisa Joos, Danny L. Coyne, Wim Bert

Journal of Nematology, Volume 49 , ISSUE 2, 177–188

Research Article | 03-September-2018

Revisiting the Life-Cycle of Pasteuria penetrans Infecting Meloidogyne incognita under Soil-Less Medium, and Effect of Streptomycin Sulfate on its Development

Pasteuria penetrans is a Gram-positive, endospore forming soil bacterium, infecting root-knot nematodes, Meloidogyne spp. Being obligate in nature, the bacterium is not easily grown in vitro, and the in vivo culturing technique is relied on the soil-based microcosm since long. Hence, culturing of P. penetrans using CYG germination pouches as a soil-less medium for plant growth, promises to provide a contamination free environment along with ease in isolation of infected females from the plant

Victor Phani, Uma Rao

Journal of Nematology, Volume 50 , ISSUE 2, 91–98

Research Article | 26-September-2018

Oat, Wheat, and Sorghum Genotype Reactions to Meloidogyne incognita and Meloidogyne javanica

Meloidogyne spp. are the most economically important species of plant-pathogenic nematodes. Plant resistance and crop rotation are the main nematode management methods. Thus, the objective was to evaluate the resistance of seven wheat genotypes, five oat genotypes, ten sorghum hybrids, and three sorghum–sudangrass genotypes to Meloidogyne incognita and Meloidogyne javanica. The crops were sowed in pots with an auto-claved substrate. A single plant/pot was left after thinning. The soil was


Journal of Nematology, Volume 49 , ISSUE 4, 386–389

Research Article | 03-December-2018

A novel in vitro chemotaxis bioassay to assess the response of Meloidogyne incognita towards various test compounds

Plant-parasitic, root-knot nematodes (Meloidogyne spp.) are a serious problem in agri- and horticultural crops worldwide. Understanding their complex host recognition process is essential for devising efficient and environmental-friendly management tactics. In this study, the authors report a new, simple, inexpensive, efficient, and quantitative method to analyze the chemotaxis of M. incognita second-stage juveniles (J2s) using a combination of pluronic gel and agar in a petri dish. The authors

Tagginahalli N. Shivakumara, Tushar K. Dutta, Uma Rao

Journal of Nematology, Volume 50 , ISSUE 4, 487–494

research-article | 26-April-2019

Control of Meloidogyne incognita in sweetpotato with fluensulfone

-knot nematodes (RKN: Meloidogyne spp.) are economically the most damaging nematodes in sweetpotato both on a worldwide scale as well as in California (Overstreet, 2009). Crop loss estimates of 10% due to RKN were reported in California (Koenning et al., 1999). Unlike many other vegetable crops, most sweetpotato cultivars are particularly sensitive to RKN damage because symptoms develop directly on the harvested product. Symptoms of RKN on the harvested storage roots depend on the sweetpotato

Antoon Ploeg, Scott Stoddard, J. Ole Becker

Journal of Nematology, Volume 51 , 1–8

research-article | 15-April-2019

Nicotinamide adenine dinucleotide induced resistance against root-knot nematode Meloidogyne hapla is based on increased tomato basal defense

Root-knot nematodes (RKNs; Meloidogyne spp.) are sedentary endoparasitic nematodes that can infect a wide range of plant species worldwide, which results in approximately $70 billion in crop losses annually (Caboni et al., 2012). Meloidogyne spp. is ranked within the top 10 most economically devastating plant-parasitic nematodes, with Meloidogyne incognita, M. arenaria, M. hapla, and M. javanica as the four major crop-damaging species (Jones et al., 2013). In tomato, yield loss due to RKNs

Noor Abdelsamad, H. Regmi, J. Desaeger, P. DiGennaro

Journal of Nematology, Volume 51 , 1–10

research-article | 30-November-2019

Morphological and molecular characterization of Pratylenchus species from Yam (Dioscorea spp.) in West Africa

most damaging. They affect yield and tuber quality, reducing yam production and tuber storability (Ayensu and Coursey, 1972; Bridge et al., 2005; Coyne and Affokpon, 2018). The major plant-parasitic nematodes known to cause serious damage on yam tubers are the yam nematode (Scutellonema bradys (Steiner and LeHew, 1933; Andrássy, 1958), root-knot nematodes (Meloidogyne spp.) and root-lesion nematodes (RLN) (Pratylenchus spp.) (Bridge et al., 2005; Bridge and Starr, 2007; Kolombia et al., 2016b

Yao A. Kolombia, Oluwadamilola Ogundero, Emmanuel Olajide, Nicole Viaene, P. Lava Kumar, Danny L. Coyne, Wim Bert

Journal of Nematology, Volume 52 , 1–25

research-article | 30-November-2018

Maternal Stress Reduces the Susceptibility of Root-Knot Nematodes to Pasteuria Penetrans

D. magna genotypes were raised under low-food conditions, their offspring showed varying levels of resistance to parasites. Pasteuria penetrans is an obligate bacterial pathogen of root-knot nematodes, Meloidogyne spp. The infection process of P. penetrans has multiple steps during which the nematode could resist infection. The first step is attachment of endospores to the cuticle of the second-stage juvenile (J2). Individuals within a root-knot nematode population have been shown to vary in

Chang Liu, Pingsheng Ji, Patricia Timper

Journal of Nematology, Volume 51 , 1–8

research-article | 13-April-2020

Root-knot nematodes demonstrate temporal variation in host penetration

Shova Mishra, Peter DiGennaro

Journal of Nematology, Volume 52 , 1–8

research-article | 30-November-2019

Compatibility of fluazaindolizine and oxamyl with Pasteuria penetrans on spore attachment to juveniles of Meloidogyne javanica and M. incognita

bacterium parasitizing root-knot nematodes (RKN, Meloidogyne spp.) (Sayre and Starr, 1985), with potential as a biocontrol agent of these nematodes (Chen and Dickson, 1998). The first step in the P. penetrans-Meloidogyne interaction is the attachment of the bacterial spores on the cuticle of juveniles (J2). Spores are immobile and attachment takes place when the J2 moves and comes into contact with them. If a high number of spores attaches to the J2, movement is hindered and the nematode may not be able

Eleni Nasiou, Tim Thoden, Iro V. Pardavella, Emmanuel A. Tzortzakakis

Journal of Nematology, Volume 52 , 1–7

research-article | 30-November-2020

Host status of morning-glory (Ipomoea spp.) to Meloidogyne species

-parasitic nematodes, among which the root-knot nematodes (Meloidogyne spp. Göldi). This phytoparasite genus has the greatest impact on crops in the world, in addition to being the genus most frequently found in parasitic weed roots (Bellé et al., 2019; Ferraz et al., 1978; Moens and Perry, 2009). In Brazil, an increasing number of studies have been developed that report weeds, present in agricultural areas, as natural hosts of several species of nematodes of the genus Meloidogyne (Bellé et al., 2016

Tiago Edu Kaspary, Ismail Teodoro de Souza Júnior, Rodrigo Ferraz Ramos, Cristiano Bellé

Journal of Nematology, Volume 53 , 1–6

research-article | 30-November-2021

Review of nematode interactions with hemp (Cannabis sativa)

(Meloidogyne spp.) Parasitism of hemp by species of Meloidogyne, the root-knot nematodes (RKN), is well-established, although based on just a handful of papers. The Web of Science and CABI databases contain 40,355 and 29,679 records, respectively, of root-knot nematode publications as of 16 August 2021, but only 20 deal with specific root-knot nematodes on hemp (Fig. 1). Of the many described species of Meloidogyne, five have been examined at least cursorily for their ability to reproduce on hemp: M

Ernest C. Bernard, Angel G. Chaffin, Kimberly D. Gwinn

Journal of Nematology, Volume 54 , 1–18

Article | 05-December-2017

Influence of Root Exudates and Soil on Attachment of Pasteuria penetrans to Meloidogyne arenaria

Abstract: The bacterium Pasteuria penetrans is a parasite of root-knot nematodes (Meloidogyne spp.). Endospores of P. penetrans attach to the cuticle of second-stage juveniles (J2) and subsequently sterilize infected females. When encumbered by large numbers of spores, juveniles are less mobile and their ability to infect roots is reduced. This study looked at different factors that influence spore attachment of P. penetrans to the root-knot nematode Meloidogyne arenaria. Pretreatment of J2


Journal of Nematology, Volume 49 , ISSUE 3, 304–310

research-article | 30-November-2018

Identification of Suitable Meloidogyne spp. Housekeeping Genes

Root-knot nematodes (RKN, Meloidogyne spp.) are sedentary endoparasites with wide host ranges, including most important agricultural crops, and cause billions of dollars in yield losses (Sasser and Freckman, 1987). The first genomes of M. hapla and M. incognita were available in 2008 (Abad et al., 2008; Opperman et al., 2008), and now the genomes of seven RKN species, including the abovementioned two, and M. arenaria, M. enterolobii, M. floridensis, M. javanica are publicly available. The

Weiming Hu, Peter M. DiGennaro

journal of nematology, Volume 51 , 1–11

research-article | 26-April-2019

First report of Meloidogyne javanica on Ginger and Turmeric in the United States

Abolfazl Hajihassani, Weimin Ye, Brooke B. Hampton

Journal of Nematology, Volume 51 , 1–3

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