VOLUME 49 , ISSUE 2 (June 2017) - List of articles

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Introduction to Nematode Genome and Transcriptome Announcements in the Journal of Nematology

DEE R. DENVER/ ERIK J. RAGSDALE/ W. KELLEY THOMAS/ INGA A. ZASADA

The Journal of Nematology now offers publication of Nematode Genome Announcements (NGA) and Nematode Transcriptome Announcements (NTA). These brief reports announce the sequencing and assembly of a nematode genome or transcriptome resource, along with basic technical information on DNA sequencing and bioinformatic methods used. This publishing initiative offers a new avenue to openly and concisely communicate the availability and relevance of genome and transcriptome sequence resources to the br(..)

DOI: 10.21307/jofnem-2017-053

The Draft Genome of Globodera ellingtonae

WENDY S. PHILLIPS/ DANA K. HOWE/ AMANDA M. V. BROWN/ SEBASTIAN EVES-VAN DEN AKKER/ LEVI DETTWYLER/ AMY B. PEETZ/ DEE R. DENVER/ INGA A. ZASADA

Globodera ellingtonae is a newly described potato cyst nematode (PCN) found in Idaho, Oregon, and Argentina. Here, we present a genome assembly for G. ellingtonae, a relative of the quarantine nematodes G. pallida and G. rostochiensis, produced using data from Illumina and Pacific Biosciences DNA sequencing technologies.

DOI: 10.21307/jofnem-2017-054

Draft Transcriptome of Globodera ellingtonae

WENDY S. PHILLIPS/ SEBASTIAN EVES-VAN DEN AKKER/ INGA A. ZASADA

Globodera ellingtonae is a newly described cyst nematode found in Idaho, Oregon, and Argentina. Here we present the first transcriptome assembly of G. ellingtonae, providing a valuable resource for comparing the evolution of expressed genes between potato cyst nematode species.

DOI: 10.21307/jofnem-2017-055

First Report of the Fig Cyst Nematode, Heterodera fici Kirjanova, on Fig Tree, Ficus carica, in Ontario, Canada

FENGCHENG SUN/ NEIL HENRY/ QING YU

Although fig trees are a popular ornamental fruit tree in subtropical regions, some hardy species, such as Ficus carica, have been grown in the west coast of British Columbia and southern Ontario in Canada. The fig cyst nematode, Heterodera fici Kirjanova, is a pest on fig plants, and the heavy infestation can cause retarded growth and yellowing of leaves (Maqbool et al., 1987). In the spring of 2016, a sample of rhizosphere from a potted fig (F. carica) seedling was submitted to the Nematology (..)

DOI: 10.21307/jofnem-2017-056

Management of Root-knot Nematode (Meloidogyne incognita) onPittosporum tobira Under Greenhouse, Field, and On-farm Conditions in Florida

RICHARD BAIDOO/ TESFAMARIAM MENGISTU/ ROBERT MCSORLEY/ ROBERT H. STAMPS/ JANETE BRITO/ WILLIAM T. CROW

Root-knot nematodes are important pests of cut foliage crops in Florida. Currently, effective nematicides for control of these nematodes on cut foliage crops are lacking. Hence, research was conducted at the University of Florida to identify pesticides or biopesticides that could be used to manage these nematodes. The research comprised on-farm, field, and greenhouse trials. Nematicide treatments evaluated include commercial formulations of spirotetramat, furfural, and Purpureocillium lilacinum (..)

DOI: 10.21307/jofnem-2017-057

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

JOHAN DESAEGER/ DONALD W. DICKSON/ S. J. LOCASCIO

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 (..)

DOI: 10.21307/jofnem-2017-058

Sampling Error in Relation to Cyst Nematode Population Density Estimation in Small Field Plots

VESNA ZUPUNSKI/ RADIVOJE JEVTIC/ VESNA SPASIC JOKIC/ LJUBICA ZUPUNSKI/ MIRJANA LALOSEVIC/ MIHAJLO CIRIC/ ZIVKO CURCIC

Cyst nematodes are serious plant-parasitic pests which could cause severe yield losses and extensive damage. Since there is still very little information about error of population density estimation in small field plots, this study contributes to the broad issue of population density assessment. It was shown that there was no significant difference between cyst counts of five or seven bulk samples taken per each 1-m2 plot, if average cyst count per examined plot exceeds 75 cysts per 100 g of soi(..)

DOI: 10.21307/jofnem-2017-059

Reproduction of Meloidogyne incognita and M. graminis on Several Grain Sorghum Hybrids

KATHERINE HURD/ TRAVIS R. FASKE

A total of 27 grain sorghum hybrids were evaluated in a series of greenhouse experiments to determine their susceptibility to Meloidogyne incognita race 3 and M. graminis. Each hybrid was inoculated with 2,000 nematode eggs/pot. Reproduction by M.incognita was numerically greater than M. graminis on 93% of the hybrids tested, indicating that grain sorghum is a better host for M.incognita than M. graminis. A wide variation in host suitability was observed on these hybrids in a second experiment a(..)

DOI: 10.21307/jofnem-2017-060

Description of Pseudacrobeles (Pseudacrobeles) curvatus sp. n. (Cephalobidae: Rhabditida) in South Korea

Jiyeon Kim/ Taeho Kim/ Joong-Ki Park

Abstract Pseudacrobeles (Pseudacrobeles) curvatus sp. n. was collected from potato fields in Gyeongsangnam-do, South Korea. The new species shares morphological characters typical of the genus Pseudacrobeles, including three lateral incisures that fade posteriorly near the phasmid openings. The new species differs from other Pseudacrobeles species by its smaller body size and a comparatively shorter corpus relative to the isthmus length. In this study, we provide a comparison of morphometrics an(..)

DOI: 10.21307/jofnem-2017-061

Deladenus posteroporus n. sp. (Nematoda: Neotylenchidae) Isolated from Packaging Wood from Canada and White Pine (Pinus monticola) Lumber from the United States and Intercepted in Ningbo, China

Qing Yu/ Jianfeng Gu/ Weimin Ye/ Rusong Li/ Jie He

Abstract Deladenus posteroporus n. sp. isolated from packaging wood originated from Canada and from white pine lumber from the United States, both intercepted in the port of Ningbo, China, is described and illustrated. Both mycetophagous and infective forms were recovered from the Canadian sample, whereas only the mycetophagous form was found in the U.S. sample. The new species is characterized by the posteriorly positioned excretory pore relative to the hemizonid in both mycetophagous and infec(..)

DOI: 10.21307/jofnem-2017-062

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

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

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 identifie(..)

DOI: 10.21307/jofnem-2017-063

Redefinition of Genus Malenchus Andrassy, 1968 (Tylenchomorpha: Tylenchidae) with Additional Data on Ecology

XUE QING/ WIM BERT

Malenchus is the second specious genus in Tylenchidae. In the presented study, we examined 22 populations including 12 type/paratype species. Detailed morphology was recovered using light microscopy, scanning- and transmission- electron microscopy. All population and type slides were recorded as picture and video vouchers, which are available online. We have compared inter- or intraspecific variations and extracted taxonomically informative traits. Amended definitions of the Malenchus as well as(..)

DOI: 10.21307/jofnem-2017-064

Numerical Taxonomy Helps Identification of Merliniidae and Telotylenchidae (Nematoda: Tylenchoidea) from Iran

REZA GHADERI/ HABIBALLAH HAMZEHZARGHANI/ AKBAR KAREGAR

Numerical taxonomy was used for identification and grouping of the genera, species, and populations in the families Merliniidae and Telotylenchidae. The variability of each of 44 morphometric characters was evaluated by calculation of the coefficient of variability (CV) and the ratio of extremes (max/min) in the range of 1,020 measured females. Also correlation and regression analyses were made between characters to find potential collinearities. Hierarchical cluster analysis (HCA) was used for (..)

DOI: 10.21307/jofnem-2017-065

Cryptaphelenchus varicaudatus n. sp. (Rhabditida: Ektaphelenchinae) from Tehran Province, Iran

MAJID PEDRAM

Cryptaphelenchus varicaudatus n. sp. is described and illustrated. It was isolated from bark samples of dead or dying pine (Pinus spp.) trees with bark beetle frass and galleries, in Tehran province. The new species has 275- to 367-mm-long females (amedium-sized species) with distinctly annulated cuticle having three bands in lateral fields, lip region continuous with body contour, delicate knobbed stylet, monodelphic–prodelphic reproductive system with distinct spermatheca, short postvulval ute(..)

DOI: 10.21307/jofnem-2017-066

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