VOLUME 48 , ISSUE 2 (June 2016) - List of articles

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

KELLY A. MORRIS/ DAVID B. LANGSTON/ RICHARD F. DAVIS/ JAMES P. NOE/ DON W. DICKSON/ PATRICIA TIMPER

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 at(..)

DOI: 10.21307/jofnem-2017-010

Reproduction and Damage Potential of Five Geographical Ditylenchus africanus Populations on Peanut

SONIA STEENKAMP/ DIRK DE WAELE/ ALEXANDER MCDONALD

Ditylenchus africanus affects peanut quality, which leads to downgrading of consignments and economic losses for producers.This nematode is difficult to control and host-plant resistance may be the most effective way to control it. Recently, the peanut breeding line PC254K1 has been identified as resistant to a D. africanus population from Vaalharts and will be included into the peanut breeding program. The objectives of our study were to compare the reproduction potential of D. africanus geogra(..)

DOI: 10.21307/jofnem-2017-011

Reproduction of Meloidogyne incognita Race 3 on Flue-cured Tobacco Homozygous for Rk1 and/or Rk2 Resistance Genes

JILL R. POLLOK/ CHARLES S. JOHNSON/ J. D. EISENBACK/ T. DAVID REED

Most commercial tobacco cultivars possess the Rk1 resistance gene to races 1 and 3 of Meloidogyne incognita and race 1 of Meloidogyne arenaria, which has caused a shift in population prevalence in Virginia tobacco fields toward other species and races. A number of cultivars now also possess the Rk2 gene for root-knot resistance. Experiments were conducted in 2013 to 2014 to examine whether possessing both Rk1 and Rk2 increases resistance to a variant of M. incognita race 3 compared to either gen(..)

DOI: 10.21307/jofnem-2017-012

The Effect of Endophytic Fungi on Nematode Populations in Summer-dormant and Summer-active Tall Fescue

JAMES K. ROGERS/ NATHAN R. WALKER/ CAROLYN A. YOUNG

Summer-active (continental) and summer-dormant (Mediterranean) tall fescue morphotypes are each adapted to different environmental conditions. Endophyte presence provides plant parasitic nematode resistance, but not with all endophyte strains and cultivar combinations. This study sought to compare effects of four nematode genera on continental and Mediterranean cultivars infected with common toxic or novel endophyte strains. A 6-mon greenhouse study was conducted with continental cultivars, Kent(..)

DOI: 10.21307/jofnem-2017-013

Sectonema caobangense sp. n. from Vietnam (Nematoda, Dorylaimida, Aporcelaimidae)

SERGIO ALVAREZ-ORTEGA/ THI ANH DUONG NGUYEN/ JOAQUI´N ABOLAFIA/ MICHAEL BONKOWSKI/ REYES PEN˜A-SANTIAGO

Sectonema caobangense sp. n. from evergreen forest soil in Vietnam is described, including scanning electron micrograph (SEM) observations and D2-D3 LSU rDNA analysis. The new species is characterized by its 3.12 to 5.80mmlong body, lip region offset by deep constriction and 21 to 23 mm broad, mural tooth 13 to 14 mm long at its ventral side, 940 to 1,112 mm long neck, pharyngeal expansion occupying 61% to 69% of total neck length, uterus a long simple tube-like structure 292 to 363 mm long or 2(..)

DOI: 10.21307/jofnem-2017-014

A Third New Species of Aporcelinus Andrassy, 2009 (Dorylaimida, Aporcelaimidae) from Vietnam, with the First SEM Study of a Representative of the Genus

THI ANH DUONG NGUYEN/ JOAQUI´N ABOLAFIA/ MICHAEL BONKOWSKI/ REYES PEN A–SANTIAGO

A new species, the third one from Vietnam, of the genus Aporcelinus is described from natural areas. Aporcelinus falcicaudatus sp. n. is characterized by its 1.28 to 1.63 mm long body, lip region offset by weak constriction and 16 to 18 mm broad, odontostyle 18 to 21 mm at its ventral side, neck 354 to 406 mm long, uterus tripartite and 61 to 95 mm long, V = 50 to 55, tail strongly recurved dorsad and conical (23–31 mm, c = 43–58, c9 = 0.7–0.9) with finely rounded tip, and male absent. Scanning (..)

DOI: 10.21307/jofnem-2017-015

Paurodontella parapitica n. sp. (Nematoda: Hexatylina, Sphaerularioidea) from Kermanshah Province, Western Iran

MEHRAB ESMAEILI/ RAMIN HEYDARI/ WEIMIN YE

Paurodontella parapitica n. sp., collected from the rhizosphere of an apple tree in Kermanshah province, western Iran, is described. The new species is characterized by a body length of 505 to 723 mm (females) and 480 to 600 mm (males), lip region continuous by depression; 7 to 8 mm broad, 3 to 4 mm high, stylet length 7 to 9 mm or 1 to 1.3 times the lip region diameter, short postuterine sac of 4 to 6 mm long, lateral fields with five to six incisures; outer incisures crenated and inner incisur(..)

DOI: 10.21307/jofnem-2017-016

Nematode Fauna of Tropical Rainforest in Brazil: A Descriptive and Seasonal Approach

MERCIA S. O. CARDOSO/ ELVIRA M. R. PEDROSA/ HOWARD FERRIS/ MARIO M. ROLIM/ LAMARTINE S. C. OLIVEIRA

Studies of nematode assemblages in natural ecosystems can contribute to better understanding of the occurrence, relevance, and ecology of plant-parasitic and other soil nematodes. Nematode assemblages and environmental parameters (organic matter, water content (WC), bulk density (BD), total porosity (Po), soil respiration, and soil texture) were investigated in two seasons (rainy and dry) in two forest areas of the Zona da Mata, Pernambuco State. The aim of our research was to evaluate the heter(..)

DOI: 10.21307/jofnem-2017-017

The Effects of Nutrient Concentration, Addition of Thickeners, and Agitation Speed on Liquid Fermentation of Steinernema feltiae

LUIS G. LEITE/ DAVID I. SHAPIRO-ILAN/ SELCUK HAZIR/ MARK A. JACKSON

Entomopathogenic nematode production in liquid fermentation still requires improvements to maximize efficiency, yield, and nematode quality. Therefore, this study was aimed at developing a more suitable liquid medium for mass production of Steinernema feltiae, by assessing the effects of nutrient concentration, thickeners (primarily agar), and agitation speed on infective juvenile (IJ) yield. Base medium (BM) contained yeast extract (2.3%), egg yolk (1.25%), NaCl (0.5%), and corn oil (4%). All (..)

DOI: 10.21307/jofnem-2017-018

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