Second-stage juveniles (I2) of Meloidogyne arenaria consumed more oxygen (P </= 0.05) than M. incognita J2, which in turn consumed more than M. javanica J2 (4,820, 4,530, and 3,970 mul per hour per g nematode dryweight, respectively). Decrease in oxygen consumption depended on the nematicide used. Except for aldicarb, there was no differential sensitivity among the three nematode species. Meloi...

Yield, growth, and vigor of individual grape vines were correlated with nematode population densities in a series of California vineyards. In a Hanford sandy loam soil, Xiphinema americanum densities showed negative correlations with yield, growth, and vigor of vines. When vines were categorized according to vigor, X. americanurn densities had little relationship to yield of high-vigor vines, b...

UNLABELLED Root Knot nematode (RKN; Meloidogyne spp.) is one of the most devastating parasites that infect the roots of hundreds of plant species. RKN cannot live independently from their hosts and are the biggest contributors to the loss of the world's primary foods. RNAi gene silencing studies have demonstrated that there are fewer galls and galls are smaller when RNAi constructs targeted to ...

Plant-parasitic nematodes cause 14 % of annual losses in different crops the world and there are more than 35 genera phytoparasitic associated with rhizosphere papaya crop (Carica spp.), being most important root-knot nematode (Meloidogyne spp). The present study aimed to carry out morphological identification cultivation Andean pubescens), Sandia district, Puno, Perú. One-hundred fifty-five so...

Nematode were determined in 189 soil and root samples collected from 18 olive nurseries in Golestan province (northern Iran), between 2004 and 2008. which contain eight species belonging to eight grnera The important nematodes detected, in order of decreasing frequency of infestation (percentage of samples), were Aphelenchus avenae, Meloidogyne javanica, Irantylenchus sp., Pratylenchus thornei,...

BACKGROUND Dispersal is an important nematode behavior. Upon crowding or food depletion, the free living bacteriovorus nematode Caenorhabditis elegans produces stress resistant dispersal larvae, called dauer, which are analogous to second stage juveniles (J2) of plant parasitic Meloidogyne spp. and infective juveniles (IJ)s of entomopathogenic nematodes (EPN), e.g., Steinernema feltiae. Regulat...

Objectives: The main objective of this study was to identify some yam assessions that are tolerant to the most invasive nematodes like Scutellonema bradys and Meloidogyne spp. Methodology and results: New assessions of Dioscorea spp. were screened in the savanna zone of central Côte d’Ivoire. Fourteen of D. alata and thirty seven assessions of D. rotundata were tested respectively and separatel...

Meloidogyne spp. are recognized worldwide as causing root galls on a wide range of plants. They have also been reported to cause galls on above-ground parts of 26 plant species in 22 genera, either under natural field conditions or after artificial inoculation (2,3,5,8,10-13). We observed galls containing root-knot nematodes on inflorescences and leaves of Palisota barteri Hook. f. in a Florida...

Secreted effectors in plant root-knot nematodes (RKNs, or Meloidogyne spp.) play key roles in their parasite processes. Currently identified effectors mainly focus on the early stage of the nematode parasitism. There are only a few reports describing effectors that function in the latter stage. In this study, we identified a potential RKN effector gene, Misp12, that functioned during the latter...