Current Nematode Threats to World Agriculture

Nıcol, J. M.; Turner, Susan; Coyne, Danny; Nijs, Loes den; Hockland, S.; Maafi, Z. Tahna

doi:10.1007/978-94-007-0434-3_2

Cited by 540 publications

(371 citation statements)

References 28 publications

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“…Over 4100 species of plant-parasitic nematodes have been identiied [20]. Collectively, they cause an estimated $80-$118 billion dollars per year in damage to crops [21,22]. Encompassing 15% of all identiied nematode species, the most economically important species directly target plant roots of major production crops and prevent water and nutrient uptake resulting in reduced agronomic performance, overall quality and yields.…”

Section: The Impact Of Plant-parasitic Nematodes On Cropsmentioning

confidence: 99%

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The Impact of Plant-Parasitic Nematodes on Agriculture and Methods of Control

Bernard¹,

Egnin²,

Bonsi³

2017

Nematology - Concepts, Diagnosis and Control

114

101

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Plant-parasitic nematodes are costly burdens of crop production. Ubiquitous in nature, phytoparasitic nematodes are associated with nearly every important agricultural crop and represent a signiicant constraint on global food security. Root-knot nematodes (Meloidogyne spp.) cyst nematodes (Heterodera and Globodera spp.) and lesion nematodes (Pratylenchus spp.) rank at the top of list of the most economically and scientiically important species due to their intricate relationship with the host plants, wide host range, and the level of damage ensued by infection. Limitations on the use of chemical pesticides have brought increasing interest in studies on alternative methods of nematode control. Among these strategies of nonchemical nematode management is the identiication and implementation of host resistance. In addition, nematode genes involved in parasitism represent key targets for the development of control through gene silencing methods such as RNA interference. Recently, transcriptome proiling analyses has been used to distinguish nematode resistant and susceptible genotypes and identify the speciic molecular components and pathways triggered during the plant immune response to nematode invasion. This summary highlights the importance of plant-parasitic nematodes in agriculture and the molecular events involved in plant-nematode interactions.

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Section: The Impact Of Plant-parasitic Nematodes On Cropsmentioning

confidence: 99%

“…Maize (Zea mays) is grown largely throughout the world with three largest production in North America Asia and Europe [21]. Over 50 species that are known to parasitize corn in the globally however, the most devastating genera include the root knot nematodes, Meloidogyne spp., the root lesion nematodes, Pratylenchus spp.…”

Section: Maizementioning

confidence: 99%

The Impact of Plant-Parasitic Nematodes on Agriculture and Methods of Control

Bernard¹,

Egnin²,

Bonsi³

2017

Nematology - Concepts, Diagnosis and Control

114

101

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“…The direct and indirect damage caused by various plant parasitic nematode species results in delayed crop maturity, toppling, reduced yields and quality of crop product, high production costs and consequently income loss (Sikora and Fernández, 2005;Onkendi et al, 2014). Global damage caused by plant nematodes has been estimated to $US 80 billion per year (Nicol et al, 2011;Navia et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Occurrence, abundance and distribution of plant-parasitic nematodes associated with rice (<i>Oryza</i> spp.) in different rice agroecosystems in Togo

Gnamkoulamba¹,

Tounou²,

Tchabi³

et al. 2018

Int. J. Bio. Chem. Sci

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Rice is the second most important cereal in Togo. Among constraints that affect rice production, plant parasitic nematodes are of great importance. The objective of this study was to determine the distribution, abundance and frequency of plant nematodes in different agroecological zones of Togo. A total of 50 composite soil and root samples (25 each) were taken from 25 fields (5 per zone) randomly selected from the five agroecological zones. Nematodes were extracted from 100 ml soil and 1g fresh root samples using the Hermann techniques. Nematodes were then fixed and mounted on slide and identified to genus level using identification keys. The survey documented twelve plant-parasitic nematode genera among which ten, (Hirschmanniella spp., Meloidogyne spp., Xiphinema spp., Scutellonema spp., Helicotylenchus spp., Heterodera spp., Criconema spp., Pratylenchus spp., Trichodorus spp. and Tylenchid spp.), were recorded from lowland, two (Helicotylenchus and Scutellonema) from upland and five (Dolichodorus spp., Helicotylenchus spp., Tylenchorhynchus spp., Scutellonema spp. and Xiphinema spp.), from flooded ecosystem. Hirschmanniella spp., Meloidogyne spp and Helicotylenchus spp. were the most frequent and abundant plant-parasitic nematode genera recorded from more than 71% of the samples. Helicotylenchus spp., Hirschmanniella spp., Meloidogyne spp. and Scutellonema spp., were recorded in both soil and root samples while Pratylenchus spp., Heterodera spp. and Tylenchorhynchus spp., were found to be associated to root and Trichodorus spp., Tylenchid spp., Xiphinema spp., Criconema spp. and Dolichodorus spp., were recorded from soil samples only. The high diversity of nematode genera recorded in the survey is attributed to the rice ecosystem, which is mostly characterized by lowland ecosystem with intensive cropping. This study established the evidence that nematodes could be important constraints for rice production, suggesting further research focusing on their damage potential and development of effective rice nematode management strategy for sustainable rice production in Togo.

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“…Plant-parasitic nematodes, root-knot nematodes, are recognized as major agricultural pathogens, influencing global crop quality and quantity (Nicol et al, 2011). The typical symptoms of infected plants include galls and knots in the roots of plants, wilting, and yellowing of aboveground foliage from insufficient nutrient uptake (Adekunle and Akinlua, 2007;Siddiqui et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Identification of 2-methylbutyric Acid as a Nematicidal Metabolite, and Biocontrol and Biofertilization Potentials of Bacillus pumilus L1

Lee¹,

Cho²,

Moon³

et al. 2016

Korean Journal of Soil Science and Fertilizer

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The present study described the isolation of 2-methylbutyric acid (2-MBA) produced from Bacillus pumilus L1, to subsequently investigate its nematicidal activity for the control of the root-knot nematode. The results showed that 2-MBA could be purified by chromatographic techniques and was identified using nuclear magnetic resonance and liquid chromatography-mass spectrometry. Crude extract and partially purified compounds had a significant effect on the inhibition of egg hatchability and second-stage juvenile (J2) mortality. A dose-dependent effect of 2-MBA was observed for J2 mortality and egg hatchability. Egg hatchability was 69.2%, 59.9%, 32.7%, and 0.0% at 125, 250, 500, and 1000 μg mL -1 of 2-MBA after 4 d of incubation, respectively. Meanwhile, J2 mortality was in the range of 24.4%-100.0% after 2 d of incubation, depending on the concentrations of 2-MBA used. A pot experiment also demonstrated that treatment of B. pumilus L1 culture caused a significant reduction in the number of galls, egg masses, and J2 population than that of the tap water (TW) control. However, as the B. pumilus L1 culture concentration was decreased, the efficacy of nematode control by treatment of B. pumilus L1 culture was reduced compared to that of TW. B. pumilus L1 inoculation at different concentrations also promoted cucumber plant growth. Therefore, our study demonstrated the potential of 2-MBA from B. pumilus L1 as a biocontrol agent against the root-knot nematode and a plant growth promoter for cucumber plants.

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Current Nematode Threats to World Agriculture

Cited by 540 publications

References 28 publications

The Impact of Plant-Parasitic Nematodes on Agriculture and Methods of Control

The Impact of Plant-Parasitic Nematodes on Agriculture and Methods of Control

Occurrence, abundance and distribution of plant-parasitic nematodes associated with rice (<i>Oryza</i> spp.) in different rice agroecosystems in Togo

Identification of 2-methylbutyric Acid as a Nematicidal Metabolite, and Biocontrol and Biofertilization Potentials of Bacillus pumilus L1

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