Nematode parasites of citrus.

Duncan, Larry W.; Cohn, E.

doi:10.1079/9780851997278.0437

Cited by 51 publications

(31 citation statements)

References 49 publications

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“…Although R. similis is migratory endoparasite and is mainly present inside the roots of host plants, it may be present in soil in the absence of host roots for several months (Duncan, ). Plants for planting (host or non‐host) may be imported in containers with soil or soil may be attached to their below‐ground parts.…”

Section: Data and Methodologiesmentioning

confidence: 99%

Pest risk assessment of Radopholus similis for the EU territory

Jeger¹,

Bragard²,

Caffier³

et al. 2017

EFS2

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The Panel on Plant Health performed a pest risk assessment on Radopholus similis, the burrowing nematode for the EU. The quantitative assessment focused on entry, establishment, spread and impact on tropical and subtropical ornamental host plants, the main pathways for entry of R. similis into the EU. Infested consignments are expected to enter the risk assessment area on ornamentals under all scenarios. For citrus, which is a closed pathway for entry, outdoor establishment was assessed. Establishment may only take place after successful transfer from ornamental plants to citrus production systems. This event is called 'shift' in this assessment, to indicate that this is an unusual transfer. It has been estimated that establishment of this nematode in the open field in the EU citrus production areas under current temperatures is possible in most parts of the citrus production area in the EU. Temperature conditions will prevent the nematode from establishing only in the northernmost citrus areas and at higher altitudes in the south. Host plants for planting originating from infested places of production (greenhouses) within the risk assessment area are considered the main pathway for spread within the risk assessment area. Under current climatic conditions, the population of R. similis is not expected to reach damaging population levels in the open field. In case of increased temperatures due to global warming, the nematode population may reach damaging levels in very few places outdoors. Currently, main impact is considered for ornamental greenhouse production in the risk assessment area. Impact will be either caused by direct plant growth reductions or loss due to phytosanitary measures applied on regulated plants. Despite the fact that R. similis is globally considered as one of the most destructive plant parasitic nematodes, the impact in the risk assessment area is considered low.

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Section: Data and Methodologiesmentioning

confidence: 99%

Pest risk assessment of Radopholus similis for the EU territory

Jeger¹,

Bragard²,

Caffier³

et al. 2017

EFS2

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“…Within belts, citrus roots were killed by the application of high loads of chemicals (Duncan and Cohn, 1990). Within belts, citrus roots were killed by the application of high loads of chemicals (Duncan and Cohn, 1990).…”

Section: Currently Applied Control Methods In the Eumentioning

confidence: 99%

“…R. similis severely damages the fibrous roots of citrus trees causing severe yield reductions of as much as 80 % in fruit production compared with healthy trees (Inserra et al, 2005). The age of the tree, citrus variety, farming practices in the orchards and duration of the nematode infestation have an impact on the reduction of the fruit production of trees damaged by R. similis (DuCharme, 1968;Duncan and Cohn, 1990). Because of the great economic importance of citrus production in Florida, millions of dollars have been spent on surveys, research on the biology of the nematode, and management of the disease (Thorne, 1961).…”

Section: Potential Pest Effectsmentioning

confidence: 99%

Scientific Opinion on the pest categorisation ofRadopholus similis(Cobb) Thorne andRadopholus citrophilusHuettel, Dickson and Kaplan

Rossi¹

2014

EFSA Journal

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The European Commission requested that the EFSA Panel on Plant Health perform a pest categorisation for Radopholus similis and Radopholus citrophilus. R. similis is regulated in Annex II, Part A, Section II of Council Directive 2000/29/EC as a harmful organism known to occur in the European Union (EU). R. citrophilus is regulated in Annex II, Part A, Section I of Council Directive 2000/29/EC as a harmful organism not known to occur in the EU. This pest characterisation applies only to R. similis, because R. citrophilus has been recognised as an invalid species designation and is considered as a junior synonym of R. similis. R. similis is a distinct taxonomic entity that is absent in the field production sites (citrus, bananas) of the risk assessment area and can cause significant losses in citrus production. Moreover, various susceptible hosts other than citrus species are present in the EU under climatic conditions that are suitable for the development of R. similis. The pest has a sporadic presence on ornamental plants (under protected cultivation) in a few EU countries. Plants for planting are a pathway for introduction and spread of R. similis. The pest is observed to cause impacts on ornamentals in some MSs and further impacts are expected should further spread happen in the EU.

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“…belirlenmiştir. Liskova et al (2007) Turunçgillerin en önemli zararlılarından biri olan Tylenchulus semipenetrans dünyada turunçgil yetiştirilen her alanda tespit edilmiştir (Duncan & Cohn, 1990). T. semipenetrans portakal fidanlıklarında tespit edilmiştir.…”

Section: Araştırma Sonuçları Ve Tartışmaunclassified

Ödemiş (İzmir) ilçesi sert ve yumuşak çekirdekli meyve fidanlıklarında bulunan bitki paraziti nematod faunası

Gözel¹,

Yildiz²

2015

Türk. entomol. bült.

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Ödemiş is one of the most important nursery tree and ornamental production centre of Turkey. This study was conducted in Ödemiş District of İzmir Province in stone and pome fruit production areas from 2008 to 2011. In this study, determination of plant parasitic nematode species and nematode-infested areas was aimed. For this purpose, a total of 368 soil samples were taken from different 16 fruits in stone and pome fruit production areas including apple, peach, apricot, cherry, pear, plum, quince, walnut, persimmon, almond, pomegranate, olive, oleaster and citrus in Ödemiş District. Nematodes were isolated from these soil samples by using proper methods and their identification were done based on morphological characters. In the study, plant parasitic nematode species were identified as; Pratylenchus thornei (Sher & Allen), P. penetrans (Cobb), Meloidogyne incognita (Kofoid & White), M. javanica (Treub), Xiphinema sp. (Cobb), Helicotylenchus sp., Rotylenchulus sp. and Tylenchulus sp. The most common species were determined as Helicotylenchus spp. Pratylenchus spp. and Meloidogyne spp. respectively.

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Nematode parasites of citrus.

Cited by 51 publications

References 49 publications

Pest risk assessment of Radopholus similis for the EU territory

Pest risk assessment of Radopholus similis for the EU territory

Scientific Opinion on the pest categorisation ofRadopholus similis(Cobb) Thorne andRadopholus citrophilusHuettel, Dickson and Kaplan

Ödemiş (İzmir) ilçesi sert ve yumuşak çekirdekli meyve fidanlıklarında bulunan bitki paraziti nematod faunası

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