Soil and Freshwater Nematodes

Goodey, T.; Goodey, J. B.; Jenkins, W. R.

doi:10.1097/00010694-195107000-00019

Cited by 62 publications

(41 citation statements)

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“…Dehydrated of nematodes was done in glycerol-ethanol solution. (De Grisse 1969) and mounted permanently on glass slides and identified up to species level following the keys (Thorne 1961, Goodey 1963, Siddiqi 1974. The root-knot nematode species was identified on the basis of the perineal pattern of the mature female.…”

Section: Methodsmentioning

confidence: 99%

Nematode diversity in banana rhizosphere from northern districts of Bangladesh

et al. 2012

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Context: Banana is one of the most important fruits crops among the different fruit crops in the agricultural and its intensively cultivated in all over the parts of Bangladesh especially in northern part. Many species of plant parasitic nematodes are association with banana root systems and are mainly responsible for controlling the banana productions to greater extend.Objective: Keeping in view of the disturbing nature of the nematode pest, the present study was undertaken to examine the biodiversity of plant parasitic nematodes associated with banana intensively grown in northern districts of Bangladesh. Materials and Methods:The collection of nematodes was conducted in the banana growing areas of Bogra, Natore, Rajshahi, Rangpur and Gaibandha districts. In each area, banana fields of different commercial cultivars were chosen for collection of soil and root samples. From each field 10 plants were selected randomly for sample collection. Each subsample consisted about 1 kg of soil and 20 g of fleshy roots taken from a single mat from a depth of 10-30 cm and from three equidistant points (40-50 cm) around the pseudostem Nematodes were extracted from soil by Cobb's sieving technique and from root by Mechanical maceration technique, and processed by Seinhorst's slow dehydration method. Fixing was done in boiling lactophenol cotton blue and finally by formalin glycerin solution. Dehydrated nematodes were kept in glycerol-ethanol solution and mounted permanently on glass slides. Identification was done up to species following the keys.Results: Among the plant parasitic nematodes ten species belonging to nine genera, six families of a single order, viz. Helicotylenchus dihystera, Rotylenchulus reniformis, Meloidogyne incognita, Hoplolaimus galeatus, Tylenchorhynchus mashhoodi, Tylenchorhynchus annulatus, Criconemoides sp., Hemicriconemoides cocophillus, Cephalenchus emarginatus and Aphelenchus avenae were encountered. Among the non-parasitic nematodes 15 genera belonging to seven families and three orders viz. Acrobeles, Acrobeloides, Aporcelaimus, Aporcelaimium, Aporcelaimellus, Cephalobus, Dorylaimus, Dorylaimoides, Discolaimus, Discolaimium, Discolaimoides, Indodorylaimus, Mylonchulus, Iotonchus, and Rhabditis were found to be associated with soils in banana field. It was found that species H. galeatus, C. emarginatus and M. incognita were present in all the surveyed areas. Four species of parasitic nematodes viz. C. emarginatus, H. cocophillus, Criconemoides sp. and A. avenae and 5 genera of non parasitic nematodes viz., Aporcelaimium, Aporcelaimellus, Discolaimium, Discolaimoides and Indodorylaimus are reported for the first time in Bangladesh. Conclusion:Present investigation have clearly indicated that the association of plant parasitic nematodes especially the most an important nematodes species like Hoplolaimus galeatus, Cephalenchus emarginatus and Meloidogyne incognita would cause severe economic yield loss to banana plantation in the study area.

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Section: Methodsmentioning

confidence: 99%

Nematode diversity in banana rhizosphere from northern districts of Bangladesh

et al. 2012

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“…Alternatively, it may be an accidental association that occurred in captivity. Since some Panagrellus and Panagrolaimus species are reported to be associated with fruits or material for rearing (Goodey, 1963;F elix and Duveau, 2012), it is possible that the origin of the infection could be sought in the apples used to feed the weevils or in the coconut or palm fibers used for the larvae pupation. Whether this was a chance infestation of a suboptimal host in the laboratory, or a repeatable phenomenon present in nature, it will be informed by further field sampling and laboratory testing.…”

Section: Resultsmentioning

confidence: 99%

Occurrence of Panagrellus (Rhabditida: Panagrolaimidae) Nematodes in a Morphologically Aberrant Adult Specimen of Rhynchophorus ferrugineus (Coleoptera: Dryophthoridae)

Camerota

Mazza

Carta

et al. 2016

Journal of Nematology

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An aberrant specimen of Rhynchophorus ferrugineus (Coleoptera: Dryophthoridae) also known as red palm weevil (RPW), the most economically important insect pest of palms in the world, was found among a batch of conspecifics reared for research purposes. A morphological analysis of this weevil revealed the presence of nematodes associated with a structured cuticle defect of the thorax. These nematodes were not able to be cultured, but were characterized by molecular analysis using 28S and 18S ribosomal DNA and shown to belong to the family Panagrolaimidae (Rhabditida), within a clade of Panagrellus. While most nematodes in the insect were juveniles, a single male adult was partially characterized by light microscopy. Morphometrics showed similarities to a species described from Germany. Excluding the entomopathogenic nematodes (EPN), only five other genera of entomophilic or saprophytic rhabditid nematodes are associated with this weevil. This is the first report of panagrolaimid nematodes associated with this invasive pest. Possible mechanisms of nematode-insect association are discussed.Key words: insect thorax defect, invasive species, nematode phoresy, physiological ecology, saprophagous nematode, sour paste nematode.Rhynchophorus ferrugineus, the RPW, is currently considered as the most damaging pest of palm species in the world (Giblin-Davis et al., 2013). A recent review highlighted the paucity of data concerning the natural enemies and the organisms associated with the RPW (Mazza et al., 2014). Although new knowledge has been acquired in recent years, much remains to be done (Mazza et al., 2014). Excluding the EPN belonging to Steinernema and Heterorhabditis genera, few other insectassociated nematodes with entomophilic, saprobiotic, phoretic, commensal, or parasitic associations (Sudhaus, 2008) are known to be associated with this weevil. Those genera already identified include Acrostichus Rahm, 1928; Bursaphelenchus Fuchs, 1937; Caenorhabditis (Osche, 1952) Dougherty, 1953 Diplogasteritus Paramonov, 1952; Mononchoides Rahm, 1928, and Teratorhabditis (Osche, 1952) Dougherty, 1953 (reviewed in Troccoli et al., 2015. Further studies are necessary to identify weevil nematodes, clarify their biology and type of association with RPW, and consider their possible effects as biocontrol agents (Mazza et al., 2014). With this aim, we report the first finding of nematodes belonging to Panagrolaimidae (Nematoda: Rhabditida) associated with the RPW and briefly discuss the possible modes of association. MATERIALS AND METHODSOrigin and rearing of the RPW: Newly emerged RPW adults with a balanced sex ratio (n = 384) were provided by the UTAGRI-ENEA C.R. Casaccia, Laboratorio Gestione Sostenibile degli Agroecosistemi, Rome, Italy in 2013 to 2014. Larvae were individually reared, in a climatic room (298C, about 100% relative humidity with a photoperiod of 12:12), in plastic containers with perforated lids, fed with apple slices, and incubated until adult emergence. Final larval instars made cocoons using coc...

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“…Identifications are made to genus, generally following Goodey (1963), as this provides a basis for overall assessment, and if future workers have a detailed interest in the role of a particular predacious, mycophagous, bacteriophagous vI phytophagous genus, specific taxonomy can then be carried out. Fig.…”

Section: Methodsmentioning

confidence: 99%

Populations of nematode genera in soils under pasture

Yeates¹

1978

New Zealand Journal of Agricultural Research

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Soil and Freshwater Nematodes

Cited by 62 publications

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Nematode diversity in banana rhizosphere from northern districts of Bangladesh

Nematode diversity in banana rhizosphere from northern districts of Bangladesh

Occurrence of Panagrellus (Rhabditida: Panagrolaimidae) Nematodes in a Morphologically Aberrant Adult Specimen of Rhynchophorus ferrugineus (Coleoptera: Dryophthoridae)

Populations of nematode genera in soils under pasture

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