Chemical control of nematodes.

Haydock, P. P. J.; Woods, S. R.; Grove, Ivan G.; Hare, M. C.

doi:10.1079/9781845930561.0392

Cited by 50 publications

(25 citation statements)

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“…However, as is the case for all non‐fumigant nematicides (carbamates and organophosphates), the biochemical effects at field rates can be reversed, and nematode recovery may occur if concentration and exposure time are too low 21, 22. However, technically speaking, although nematodes may recover under laboratory conditions, they are probably too weak to locate a host root and would likely die of starvation in the field 23…”

Section: Resultsmentioning

confidence: 99%

Effect of abamectin on root‐knot nematodes and tomato yield

Qiao

Liu

Wang

et al. 2012

Pest Management Science

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Section: Resultsmentioning

confidence: 99%

Effect of abamectin on root‐knot nematodes and tomato yield

Qiao

Liu

Wang

et al. 2012

Pest Management Science

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“…Meloidogyne javanica ( Mj ), M. incognita ( Mi ), and M. arenaria ( Ma ) are the most common species of RKNs in the warm climate of southern Europe but also in glasshouses of the more temperate climate of northern Europe (Wesemael et al, 2011). The polyphagous behavior of RKNs as well as the ban on the most effective agrochemical nematicides constitutes a challenge for the successful management of this pest (Haydock et al, 2013). Understanding the molecular processes underlying the formation of galls and GCs and a deep knowledge of the nematode’s biology are crucial for the development of new biotechnology-based control methods (reviewed in Fosu-Nyarko and Jones, 2015).…”

Section: Introductionmentioning

confidence: 99%

Long-Term In Vitro System for Maintenance and Amplification of Root-Knot Nematodes in Cucumis sativus Roots

et al. 2016

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Root-knot nematodes (RKN) are polyphagous plant-parasitic roundworms that produce large crop losses, representing a relevant agricultural pest worldwide. After infection, they induce swollen root structures called galls containing giant cells (GCs) indispensable for nematode development. Among efficient control methods are biotechnology-based strategies that require a deep knowledge of underlying molecular processes during the plant-nematode interaction. Methods of achieving this knowledge include the application of molecular biology techniques such as transcriptomics (as massive sequencing or microarray hybridization), proteomics or metabolomics. These require aseptic experimental conditions, as undetected contamination with other microorganisms could compromise the interpretation of the results. Herein, we present a simple, efficient and long-term method for nematode amplification on cucumber roots grown in vitro. Amplification of juveniles (J2) from the starting inoculum is around 40-fold. The method was validated for three Meloidogyne species (Meloidogyne javanica, M. incognita, and M. arenaria), producing viable and robust freshly hatched J2s. These J2s can be used for further in vitro infection of different plant species such as Arabidopsis, tobacco and tomato, as well as to maintain and amplify the population. The method allowed maintenance of around 90 Meloidogyne sp. generations (one every 2 months) from a single initial female over 15 years.

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“…Such losses cost the potato industry an estimated £50M annually (Bhattarai et al, 2010), with the corresponding amount in the EU the end of 2011 (US Environmental Protection Agency (EPA), 2010). The annual cost of granular nematicides to the grower has been estimated to be approximately £360 ha −1 (fumigants ca £550 ha −1 ) (Evans, 2003) and, consequently, it is important that they are used efficiently to maximise benefits in terms of nematode control and crop yield (Haydock et al, 2006).…”

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Degradation of the nematicide oxamyl under field and laboratory conditions

Haydock

Ambrose

Wilcox

et al. 2012

Nematol

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The persistence of nematicides such as oxamyl can vary greatly in field conditions. The objectives of the present studies were: i) to compare oxamyl degradation in soils with different properties; ii) to quantify and examine the influence of various abiotic factors on oxamyl degradation; iii) to establish the validity of using simulated models to predict the degradation in the field; and iv) to examine if a second application of oxamyl to the same soil 13 or 26 weeks after the first application enhances degradation. The first two studies included field measurements of oxamyl concentration and parallel laboratory incubations. For the field measurements, soils were collected from each of ten potato (Solanum tuberosum) fields in Shropshire, UK, immediately after application of oxamyl on the day of planting and then at weekly intervals for the duration of the two experiments. After each collection, oxamyl was extracted and its concentration determined. For the laboratory incubations, soils were collected from the same ten sites immediately prior to field application and received one application of oxamyl in the laboratory at the same day (day 0). The PERSIST model was then used to predict oxamyl degradation in the field (modelled degradation). Modelled degradation was then compared with the measured degradation up to 91 days (study 1) or 56 days (study 2) after application. In study 3, an extra application of oxamyl to that in the field at day 0 was made in the laboratory at 13 or 26 weeks after application. There were wide variations in the persistence of oxamyl between the ten sites, with the field half-life ranging from 10 to 24 days. Degradation in the field was significantly greater at site 4, where it could not be detected 28 days after application. At other sites, the chemical persisted for 42-63 days and was still detectable at two sites 91 days following application. Soil temperatures had a greater impact on oxamyl degradation than rainfall accounting for up to a maximum of 79% of the variation. The short persistence at site 4 was attributed to the combination of warm and moist conditions in a higher pH soil. The PERSIST model predicted the same rate of decline of oxamyl as actually occurred in the field at only four (sites 5, 6, 7 and 8) sites. At the other sites, degradation in the field occurred at more rapid rates than predicted. This could be as a result of the model not allowing for the movement of nematicide by leaching, or because enhanced degradation of nematicides occurred at these latter sites, or due to a combination of these factors. The wide variation in half-lives and the behaviour of soils after subsequent additions of oxamyl in study 3 were suggestive of complex microbial dynamics even under controlled conditions. Further studies would be required to establish the influence of soil microflora together with that of abiotic parameters on oxamyl degradation. as a whole in the region of €300M (Deliopoulos et al., 2007).Nearly 180 t of granular nematicides were applied on approximately 40 000 ha...

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Chemical control of nematodes.

Cited by 50 publications

References 0 publications

Effect of abamectin on root‐knot nematodes and tomato yield

Effect of abamectin on root‐knot nematodes and tomato yield

Long-Term In Vitro System for Maintenance and Amplification of Root-Knot Nematodes in Cucumis sativus Roots

Degradation of the nematicide oxamyl under field and laboratory conditions

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