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Laboratory of Nematology; Wageningen Un... Publications | LitMetric

1,848 results match your criteria: "Laboratory of Nematology; Wageningen University; The Netherlands.[Affiliation]"

species have commonly been reported as important plant pathogenic fungi with wide host ranges and geographic distributions. With the increase in the number of cryptic species being described, a comprehensive global taxonomic revision of the genus is required. The present study includes 399 isolates from 32 countries.

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Larval competition between the invasive Aedes aegypti (Diptera: Culicidae) and the Caribbean endemic Aedes mediovittatus (Diptera: Culicidae) from Puerto Rico, USA.

J Med Entomol

December 2024

Entomology and Nematology Department, Florida Medical Entomology Laboratory, Institute of Food and Agricultural Sciences, University of Florida, Vero Beach, FL, 32962, USA.

Competition between mosquito species during the larval phase is a well-established mechanism structuring container mosquito communities, with invasive species often outperforming natives. We assessed the competitive outcome between 2 species that occur on the island of Puerto Rico, the historic invasive Aedes aegypti (L.) and the endemic Aedes mediovittatus (Coquillett) (Diptera: Culicidae).

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Background: Diaphorina citri is an insect vector of "Candidatus Liberibacter asiaticus" (CLas), the gram-negative bacterial pathogen associated with citrus greening disease. Control measures rely on pesticides with negative impacts on the environment, natural ecosystems, and human and animal health. In contrast, gene-targeting methods have the potential to specifically target the vector species and/or reduce pathogen transmission.

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Background: Insecticide-based malaria vector control has been implemented on the islands of São Tomé and Príncipe (STP) for more than 20 years. During this period malaria incidence was significantly reduced to pre-elimination levels. While cases remained low since 2015, these have significantly increased in the last year, challenging the commitment of the country to achieve malaria elimination by 2025.

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Alfalfa (Medicago sativa L.) is a commonly grown forage crop in Oregon and California harvested on 350,000 and 480,000 acres, respectively, in 2023 (USDA-NASS 2023). Forage alfalfa is grown as a perennial crop for about four years in the same field and each season, the crop is cut 3-4 times for hay production.

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The sweetpotato whitefly, Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae), is a polyphagous pest recognized as composed of several cryptic or sibling species. The Middle East-Asia Minor 1 (MEAM1) and the Mediterranean (MED) putative species are invasive and destructive worldwide. The MEAM1 is established throughout the United States, while MED is documented in 27 states.

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Little is known about the behaviors of African equatorial rain forest mosquito species and their potential role as sylvatic and bridge-vectors of various pathogens of animal and public health. In 2016 and 2017, the diversity and sources of water supporting immature development of mosquitoes in Talangaye Rainforest (South West Cameroon) before, during and after deforestation were investigated. Mosquito eggs, larvae and pupae were collected from 12 natural, seminatural, and artificial water sources and reared to adults.

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Effect of various physical and chemical stress conditions on the infectivity and survival of Heterorhabditis indica and Steinernema feltiae: Relationship with lipid oxidative stress.

Pestic Biochem Physiol

January 2025

Laboratory of Nematology, Institute of Agri-food, Animal and Environmental Sciences (ICA3), Universidad de O'Higgins, Campus Colchagua, Chile; Centre of System Biology for Crop Protection (BIOSAV-UOH), Universidad de O'Higgins, Chile. Electronic address:

Entomopathogenic nematodes (EPNs) of the genera Heterorhabditis and Steinernema represent an alternative for the biological control of insects. The limited half-life of EPNs is still one of the most concerning issues in their commercialization. Lipid peroxidation (LPO) caused by reactive oxygen species (ROS) may be one of the most important causes of loss of infectivity and survival of EPNs when exposed to various physicochemical stress conditions (temperature, pH, hypoxia and osmotic pressure).

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Sustained antiviral insulin signaling during West Nile virus infection results in viral mutations.

Front Cell Infect Microbiol

December 2024

School of Molecular Biosciences, College of Veterinary Medicine, Washington State University, Pullman, WA, United States.

Arthropod-borne viruses or arboviruses, including West Nile virus (WNV), dengue virus (DENV), and Zika virus (ZIKV) pose significant threats to public health. It is imperative to develop novel methods to control these mosquito-borne viral infections. We previously showed that insulin/insulin-like growth factor-1 signaling (IIS)-dependent activation of ERK and JAK-STAT signaling has significant antiviral activity in insects and human cells.

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On November 7, 2023, 3 female specimens of Aedeomyia squamipennis were captured in Collier County, Florida, for the first time during routine adult mosquito surveillance in Collier Seminole State Park. This species was first found in the USA in Miami-Dade County in 2016 and has since expanded into multiple counties throughout South Florida. The presence of Ad.

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Article Synopsis
  • The study focuses on a malaria vector prevalent in West Africa and specifically in São Tomé and Príncipe, aiming to assess its population genetics for potential field trials of genetically engineered organisms.
  • The engineered organisms feature genes that produce anti-Plasmodium peptides and utilize a Cas9-based gene drive, with research examining gene flow and dispersal rates among different subpopulations on the islands.
  • Analysis suggests a dispersal range of about 3-7 km, indicating the complexity of these dynamics and leading to the conclusion that a minimally impactful gene drive could spread easily across the islands.
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In Vitro Assessment of Sensitivity to Difenoconazole.

Microorganisms

October 2024

Phytopathology Unit, Department of Plant Protection, Ecole Nationale d'Agriculture de Meknès, Km10, Rte Haj Kaddour, BP S/40, Meknes 50001, Morocco.

causes blue mold, a major post-harvest disease affecting apples. This disease is commonly managed using fungicides, including Difenoconazole (Dif), a demethylation inhibitor (DMI) approved for its control. This investigation aims to evaluate the baseline sensitivity of 100 isolates to Difenoconazole.

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Background: Huanglongbing (HLB) is a systemic disease of citrus caused by the bacterial pathogen Candidatus Liberibacter asiaticus (CLas) that limits citrus production worldwide. CLas is an obligate bacterial pathogen that multiplies in citrus trees and in the insect vector, the Asian citrus psyllid (ACP), Diaphorina citri Kuwayama. There is no cure for HLB currently and broad-spectrum antibiotics represent one possible therapeutic against disease symptoms.

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Article Synopsis
  • - Recent research has focused on the role of CLE (CLAVATA3/EMBRYO SURROUNDING REGION-RELATED) peptides, which are short sequences of amino acids, in regulating plant development and their interaction with parasitic nematodes.
  • - These CLE peptides interact with specific receptors on plant cell membranes, triggering complex signaling pathways that influence various developmental processes and responses to infection.
  • - The findings highlight the importance of CLE peptides in both normal plant growth and defense mechanisms against plant-parasitic nematodes, showing their diverse roles across different plant species.
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First report of taxon × salinaslettuce (Subclade 8b hybrid) causing stem and basal rot in lettuce in North America.

Plant Dis

November 2024

USDA Agricultural Research Service, Mycology and Nematology Genetic Diversity and Biology Laboratory, 10300 Baltimore Ave, Beltsville, Maryland, United States, 20705;

Article Synopsis
  • Over 55% of U.S. lettuce is produced in California, with Monterey County as the leading region, where stunted and wilted lettuce varieties were observed in 2023-2024, showing significant disease symptoms.
  • Diseased plants exhibited brown lesions that developed into sunken cavities, with infection rates ranging from 5% to 75%, and lab analysis revealed the presence of Phytophthora, a harmful pathogen associated with these symptoms.
  • Genetic analysis of the isolates indicated hybridization among different Phytophthora species, suggesting the emergence of a new hybrid taxon proposed as P. taxon ×salinaslettuce, which was tested for pathogenicity on various lettuce cultivars.
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Enhanced nanobody-driven bioluminescent immunoassay for rapid parathion detection using engineered split-nanoluciferase.

Biosens Bioelectron

February 2025

Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou, Guangdong, 510642, China. Electronic address:

In this work, with parathion, a typical forbidden organophosphate pesticide as target drug, an enhanced nanobody-driven bioluminescent immunoassay based on the engineered split-nanoluciferase (NanoLuc) was proposed. Concretely, through labeling 11S and β10, two split-NanoLuc units onto the anti-parathion nanobody (Nb) VHH9 and the artificial antigen H1 coupled with carrier protein ovalbumin (H1-OVA) respectively, an NanoLuc Binary Technology (NanoBiT) system was firstly developed in the form of homogeneous immunoassay, in which the luminescence signal was produced by the reassembled NanoLuc after the combination of the 11S-fused VHH9 and β10-labeled H1-OVA. Subsequently, in order to enhance the signal-to-noise (S/N) ratio, a novel strategy of splitting 11S into two smaller subunits Δ11S and β9 was adopted so then an NanoLuc Ternary Technology (NanoTeT) system based on tri-part components of β9-fused VHH9, β10-labeled H1-OVA and Δ11S was successfully established.

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Article Synopsis
  • * This research created the Mosquito-Associated Isolate Collection (MosAIC) with 392 bacterial isolates and their genomic data to provide more detailed information than previous studies, which mainly relied on basic genetic markers.
  • * The study also analyzed specific bacterial genera and discovered gene clusters linked to mosquito host interactions, paving the way for future research on how these bacteria affect mosquito behavior and disease transmission.
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n. sp. (Nematoda: Heteroderinae), a new species of cyst-forming nematode from Southwest China, with a key to the Genus .

J Helminthol

November 2024

Laboratory of Plant Nematology and Research Center of Nematodes of Plant Quarantine, Department of Plant Pathology, College of Plant Protection, South China Agricultural University, Guangzhou, People's Republic of China.

The cyst nematodes, subfamily Heteroderinae, are plant pathogens of worldwide economic significance. A new cyst nematode of the genus within the Heteroderinae, n. sp.

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Deciphering the vectors: Unveiling the local dispersal of Litylenchus crenatae ssp. mccannii in the American beech (Fagus grandifolia) forest ecosystem.

PLoS One

November 2024

Plant Pathology and Environmental Microbiology Department, The Pennsylvania State University, University Park, Pennsylvania, United States of America.

Beech leaf disease (BLD), caused by the Litylenchus crenatae ssp. mccannii (Lcm) nematode, is an emerging threat to beech trees. This disease is characterized by distinct leaf symptoms, including leaf interveinal banding and thickened leaf texture, which leads to eventual tree mortality.

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Uncovering the fungus responsible for stem and root rot of false indigo: pathogen identification, new disease description, and genome analyses.

Plant Dis

November 2024

USDA-ARS, Mycology & Nematology Genetic Diversity and Biology Laboratory, 10300 Baltimore Avenue, Bld 010A room 223, Beltsville, Maryland, United States, 20705.

Calonectria spp. can cause destructive diseases on forestry crops, legumes like soybean and peanut, and ornamentals. Species of Calonectria affecting ornamental plants are not well characterized or understood, though they have been widely documented as an issue in the ornamental industry.

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A new type of label-free electrochemical immunosensor for the high-sensitivity determination of parathion was developed based on the oriented immobilization of nanobody (VHH9) on a gold nanoparticle-loaded polyvinyl alcohol/citric acid nanofiber membrane-modified electrode. The morphology characterization and assembly process of the modified materials were investigated using scanning electron microscopy (SEM) and electrochemical impedance spectroscopy (EIS). Under the optimum conditions, the label-free electrochemical immunosensor for parathion exhibited a linear range of 0.

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Cover crop rotation suppresses root-knot nematode infection by shaping soil microbiota.

New Phytol

January 2025

Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou, 310058, China.

Cover crop integration into grain crop rotations is a promising strategy for mitigating nematode-induced diseases in agriculture. However, the precise mechanisms underlying this phenomenon remain elusive. Here, we first assessed the impact of five commonly used cover crops on the suppression of rice root-knot nematodes (RKNs).

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Background: Fertilization practices control bacterial wilt-causing Ralstonia solanacearum by shaping the soil microbiome. This microbiome is the start of food webs, in which nematodes act as major microbiome predators. However, the multitrophic links between nematodes and the performance of R.

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is a plant-parasitic nematode that severely damages garlic ( L.) in Japan. is detected in roots, bulbs, and outer bulb skins of garlic at harvest; however, the resistance of garlic to infection is not well understood.

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Response of hibiscus mealybug (Hemiptera: Pseudococcidae) to citrus volatiles induced by mechanical injury.

Environ Entomol

December 2024

Entomology and Nematology Department, Citrus Research and Education Center, University of Florida-IFAS, Lake Alfred, FL, USA.

Hibiscus mealybug, Nipaecoccus viridis (Newstead) (Hemiptera: Pseudococcidae), is a recent invasive pest of citrus and many other crops in Florida. Nipaecoccus viridis attacks all above ground parts of citrus trees and heavy infestation can cause leaf drop and premature abortion of developing fruits. We quantified greater captures of N.

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