Academic literature on the topic 'Pratylenchus neglectus'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Pratylenchus neglectus.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Journal articles on the topic "Pratylenchus neglectus"
1
TOWNSHEND, J. L. "POPULATION DENSITIES OF FOUR SPECIES OF ROOT-LESION NEMATODES (Pratylenchus) IN THE OAT CULTIVARS, SAIA AND OAC WOODSTOCK." Canadian Journal of Plant Science 69, no. 3 (July 1, 1989): 903–5. http://dx.doi.org/10.4141/cjps89-105.
Full textAbstract:
The population densities of four species of root-lesion nematodes (Pratylenchus) were examined in two cultivars of oat (Avena sativa L.) grown in greenhouse pots. The cultivar Saia harbored fewer P. neglectus and P. penetrans than the cultivar OAC Woodstock, while both cultivars were similar hosts for P. sensillatus. Pratylenchus crenatus did not develop in either cultivar.Key words: Oat, population density, Pratylenchus crenatus, Pratylenchus neglectus, Pratylenchus penetrans, Pratylenchus sensillatus
2
Smiley, Richard W., Guiping Yan, and Jennifer A. Gourlie. "Selected Pacific Northwest Rangeland and Weed Plants as Hosts of Pratylenchus neglectus and P. thornei." Plant Disease 98, no. 10 (October 2014): 1333–40. http://dx.doi.org/10.1094/pdis-12-13-1295-re.
Full textAbstract:
Eighteen rangeland plants and 16 weed species were assayed in the greenhouse for efficiency as hosts of Pratylenchus neglectus and P. thornei. Hosting ability ratings were assigned using the ratio of final versus initial nematode density and by comparing the final nematode density to that of susceptible wheat controls. Good hosts of both Pratylenchus spp. included thickspike bluegrass ‘Critana’, smooth brome ‘Manchar’, seven wheatgrasses, and jointed goatgrass. Good hosts of P. neglectus but not P. thornei included two hairy vetches, western wheatgrass ‘Rosana’, big bluegrass ‘Sherman’, tall wheatgrass ‘Alkar’, green foxtail, kochia, large crabgrass, palmer amaranth, redroot pigweed, tumble mustard, and wild oat. Good hosts of P. thornei but not P. neglectus included hard fescue ‘Durar’, sheep fescue ‘Blacksheep’, downy brome, and rattail fescue. Poor or minor hosts of both Pratylenchus spp. included two alfalfas, dandelion, horseweed, lambsquarters, prostrate spurge, and Russian thistle. These assays will provide guidance for transitioning rangeland into crop production and for understanding the role of weeds on densities of Pratylenchus spp. in wheat-production systems.
3
Timper, P., and B. B. Brodie. "First Report of Pratylenchus neglectus in New York." Plant Disease 81, no. 2 (February 1997): 228. http://dx.doi.org/10.1094/pdis.1997.81.2.228c.
Full textAbstract:
Soil samples were collected from a field in Wyoming County near Portageville, NY, on 29 October 1992 and 23 November 1993. The field was planted with winter wheat (Triticum aestivum L.) from September 1991 to August 1992, and with potato (Solanum tuberosum L.) cv. Superior from May 1993 to September 1993. Thirty-nine and 45 samples were collected along three transects in 1992 and 1993, respectively. Two species of Pratylenchus were identified, P. neglectus (Rensch) Filipjev & Sch. Stek. (identification confirmed by A. M. Golden) and P. penetrans (Cobb) Filipjev & Sch. Stek. Their combined population densities were 134 ± 18 (mean ± SE per 100 cm3 soil) in 1992 and 195 ± 12 in 1993. P. neglectus was found in all samples, whereas P. penetrans was found in 33 and 78% of the samples in 1992 and 1993, respectively. Where both species occurred together, the density of P. neglectus was 7 to 8 times that of P. penetrans. In both years, spores of a nematode-pathogenic bacterium (probably a Pasteuria sp.) were found attached to the cuticle of P. penetrans (68% with spores in 1993) but were rarely attached to P. neglectus (less than 1% with spores). Although both Pratylenchus spp. are widespread in North America, this is the first report of P. neglectus in New York. Its dominance in the field was unexpected because P. penetrans and P. crenatus Loof are typically the dominant Pratylenchus spp. in potato production regions of northeastern North America (1). The presence of the bacterium, which appeared to be host-specific for P. penetrans, may help explain the dominance of P. neglectus. Reference: (1) R. N. Huettel et al. Am. Potato J. 68:345, 1991.
4
Smiley, Richard W., Guiping Yan, and Jennifer A. Gourlie. "Selected Pacific Northwest Crops as Hosts of Pratylenchus neglectus and P. thornei." Plant Disease 98, no. 10 (October 2014): 1341–48. http://dx.doi.org/10.1094/pdis-12-13-1296-re.
Full textAbstract:
Thirty crop species and cultivars were assayed in the greenhouse for efficiency as hosts of Pratylenchus neglectus and P. thornei. Hosting ability ratings were assigned using the ratio of final versus initial nematode density and also by comparing the final nematode density to that of a susceptible wheat control. Good hosts of both Pratylenchus spp. included oat ‘Monida’, chickpea ‘Myles’, and lentil ‘Athena’ and ‘Morton’. Good hosts of P. neglectus but not of P. thornei included 10 Brassica spp. (5 canola, 2 mustard, and 3 camelina cultivars), chickpea ‘Sierra’, sudangrass ‘Piper’, and sorghum/sudangrass hybrid ‘Greentreat Plus’. Good hosts of P. thornei but not of P. neglectus included lentil ‘Skyline’ and pea ‘Granger’, ‘Journey’, and ‘Universal’. Poor or minor hosts of both Pratylenchus spp. included chickpea ‘Dwelley’, pea ‘Badminton’, safflower ‘Gila’, ‘Girard’, and ‘KN 144’, sunflower ‘2PD08’, flax ‘Pembina’, eastern gamagrass ‘Pete’, and switchgrass ‘Blackwell’. Results of these assays will provide guidance for improving crop rotation and cultivar selection efficiencies.
5
Olthof, Th H. A., and M. S. Wolynetz. "Pratylenchus penetrans and P. neglectus in tubers of potato (Solanum tuberosum) in Ontario." Canadian Journal of Plant Science 71, no. 4 (October 1, 1991): 1251–56. http://dx.doi.org/10.4141/cjps91-173.
Full textAbstract:
Root-lesion nematodes (Pratylenchus penetrans) were extracted from peels of potato tubers (Solanum tuberosum 'Russet Burbank'). The average number of P. penetrans recovered over a 2-wk period in a mist chamber from four batches of tubers, stored for 3–18 wk at 7 °C in a cold room, ranged from 11 to 1925 nematodes tuber−1. An average of 374 Pratylenchus neglectus tuber−1 were recovered from the peels of potato Norchip, grown in soil containing on average 4370 nematodes kg−1 of soil at harvest, and stored for 19 wk at 7 °C. P. penetrans and P. neglectus were recovered only from the outer layer of potato tubers; none was found in the inner core. Planting halves of tubers containing an average of 1925 P. penetrans tuber−1 into nematode-free soil resulted in soil population densities of 2225 P. penetrans kg−1 of soil and root population densities of 884 nematodes root system−1 after 8 wk in the greenhouse. Although many, if not most, potato fields in southern Ontario are already infested by P. penetrans, these studies have shown that stored, infested tubers can initiate a new infestation. Key words: Peel, potato tuber, Pratylenchus neglectus, Pratylenchus penetrans, root-lesion nematode, Solanum tuberosum
6
Majd Taheri, Zahra, Zahra Majd Taheri, Zahra Tanha Maafi, Zahra Majd Taheri, Zahra Tanha Maafi, Sergei A. Subbotin, Zahra Majd Taheri, et al. "Molecular and phylogenetic studies on Pratylenchidae from Iran with additional data on Pratylenchus delattrei, Pratylenchoides alkani and two unknown species of Hirschmanniella and Pratylenchus." Nematology 15, no. 6 (2013): 633–51. http://dx.doi.org/10.1163/15685411-00002707.
Full textAbstract:
Thirteen species of Pratylenchidae: Pratylenchus coffeae, P. delattrei, P. loosi, P. neglectus, P. penetrans, P. pseudopratensis, P. thornei, P. vulnus, Pratylenchus sp., Pratylenchoides alkani, P. ritteri, Hirschmanniella sp. and Zygotylenchus guevarai were collected from different crops and plants throughout Iran. The specimens were identified using morphological and molecular methods. Morphometrics and morphology are given for Pratylenchus sp., P. delattrei, Pratylenchoides alkani and Hirschmanniella sp. The D2-D3 expansion segments of the 28S rRNA gene were amplified and sequenced for all 13 species studied. Diagnostic PCR-ITS-RFLP profiles are given for Pratylenchus delattrei, P. penetrans, P. pseudopratensis, Pratylenchus sp., Pratylenchoides alkani and P. ritteri. Pratylenchus neglectus and P. thornei, collected from cereal fields, P. loosi from tea plantations, P. coffeae from banana, P. penetrans from ornamental plants, P. vulnus from pines and Z. guevarai from almonds showed a high level of similarity in the D2-D3 sequences with corresponding GenBank sequences. Nucleotide differences between Iranian populations and reference species were in the intraspecific range. Pratylenchus delattrei, found in vegetable fields, and Pratylenchus sp. from palm rhizosphere, formed a highly supported clade with P. zeae, the two former species being morphologically very close to the latter except in tail shape. Pratylenchus pseudopratensis, from cereal fields, clustered with P. vulnus with low support. Phylogenetic relationships within Pratylenchus species were mainly congruent with those obtained in previous studies. Despite the morphological similarities between P. ritteri and P. alkani, the D2-D3 of 28S rRNA gene sequences differed by 5 bp. Hirschmanniella sp., from a rice field, formed a clade with H. loofi and H. kwazuna.
7
Smiley, Richard W., and Stephen Machado. "Pratylenchus neglectus Reduces Yield of Winter Wheat in Dryland Cropping Systems." Plant Disease 93, no. 3 (March 2009): 263–71. http://dx.doi.org/10.1094/pdis-93-3-0263.
Full textAbstract:
Wheat (Triticum aestivum) in low-precipitation regions of eastern Oregon and Washington is grown mostly as rainfed biennial winter wheat (10-month growing season) planted into cultivated fallow (14-month crop-free period). There are increasing trends for cultivated fallow to be replaced by chemical fallow and for spring cereals to be planted annually without tillage. Most fields are infested by the root-lesion nematodes Pratylenchus neglectus or P. thornei. A replicated multiyear experiment was conducted to compare cropping systems on soil infested by P. neglectus. Populations became greater with increasing frequency of the host crops mustard, pea, and wheat. Annual winter wheat had the highest P. neglectus populations, the lowest capacity to extract soil water, and a lower grain yield compared with wheat grown biennially or rotated with other crops. Populations of P. neglectus did not differ for cultivated versus chemical fallow. Lowest populations occurred in annual spring barley. Winter wheat yield was inversely correlated with the population of P. neglectus. Measures to monitor and to reduce the population of P. neglectus in Pacific Northwest wheat fields are recommended.
8
Al-Khafaji, Riyadh T., Erin E. Gunnink Troth, Kris N. Lambert, Jeffrey A. Johnston, and Alan T. Dyer. "Pathotypes Detected Among Populations of Pratylenchus neglectus Collected From Montana." Plant Disease 103, no. 12 (December 2019): 3259–64. http://dx.doi.org/10.1094/pdis-12-18-2234-re.
Full textAbstract:
The root lesion nematode, Pratylenchus neglectus, is one of the most damaging nematodes to affect wheat worldwide. The nematode is widely distributed in Montana, primarily affecting winter wheat within the state. Managing the nematode primarily involves rotation to resistant and moderately resistant crops (peas, lentils, and barley). A nematode survey was conducted across the state nearly 10 years after an initial survey, to reassess the nematode threat and assess the impact of changing trends in crop rotations. To assess the broad applicability of rotation crops to control P. neglectus across Montana, greenhouse trials were conducted to challenge rotational crops using eight populations of P. neglectus collected from geographically diverse locations across the state. In the trials, conducted with four Montana crops, a significant interaction was detected between crop and nematode population (analysis of variance P < 0.001). Populations from Hill, Dawson, and Chouteau counties were found to be pathogenic on barley. Male nematodes were detected in seven of the eight pot culture populations, and these were confirmed to be P. neglectus by morphological and molecular methods. These results suggest a re-evaluation of barley and lentils as a management option for P. neglectus in Montana, as pathotypes for each exist within the state.
9
Kumari, S. "Characterization of Pratylenchus crenatus and P. neglectus (Nematoda: Pratylenchidae) associated with wheat crop." Helminthologia 52, no. 3 (September 1, 2015): 280–86. http://dx.doi.org/10.1515/helmin-2015-0043.
Full textAbstract:
Abstract The distribution of Pratylenchus species associated with wheat crops was investigated in Bohemian region of the Czech Republic. In total twelve localities were sampled. The populations were identified based on morphology and morphometrics, and further characterised based on sequences of the rDNA D2/D3 region and 18S gene. Pratylenchus crenatus was present in two localities and P. neglectus in five localities. At one locality both species were detected. Sequence analysis of 18S and D2/D3 region of three populations of P. crenatus reveal no variation while five populations of P. neglectus differ by 0 to 0.14 % (18S) and 0.17 to 0.50 % (D2/D3).
10
Elhady, Ahmed, Torsten Thünen, Frank Höppner, Christiane Balko, Holger Heuer, and Johannes Hallmann. "Evaluation of soybean cultivars for their susceptibility to root-lesion nematodes under temperate conditions." Nematology 21, no. 5 (2019): 523–31. http://dx.doi.org/10.1163/15685411-00003232.
Full textAbstract:
Summary Soybean, Glycine max, is a relatively new crop in Europe gaining increasing interest for its potential to fix atmospheric nitrogen and thus increase sustainability of modern agricultural production systems. Under temperate conditions, root-lesion nematodes (Pratylenchus spp.) are one of the most prominent plant-parasitic nematode taxa of economic concern in soybean. Here, we investigated the susceptibility of soybean cultivars towards naturally occurring populations of Pratylenchus spp. and their effects on soybean yield. At the site Bundesallee the cultivars ‘Abelina’, ‘Primus’ and ‘Taifun3’ supported the highest infestation and multiplication of a mixed population of P. neglectus and P. crenatus, while ‘Sultana’ and ‘Solena’ were least susceptible. At the field site Groß Lüsewitz, ‘Primus’ and ‘Merlin’ cultivars were significantly more susceptible to P. neglectus than ‘Sultana’. Soybean yield was reduced by high initial densities of Pratylenchus spp. Results are expected to contribute to a better nematode management.
Dissertations / Theses on the topic "Pratylenchus neglectus"
1
Johnson, Wendy Ann. "Discovery and distribution of root lesion nematode, Pratylenchus neglectus, in Montana." Thesis, Montana State University, 2007. http://etd.lib.montana.edu/etd/2007/johnson/JohnsonW1207.pdf.
Full text
2
Taylor, Sharyn Patricia. "The root lesion nematode, Pratylenchus neglectus, in field crops in South Australia." Title page, contents and summary only, 2000. http://web4.library.adelaide.edu.au/theses/09PH/09pht2462.pdf.
Full textAbstract:
Includes bibliographical references (leaves 241-25). Aims to evaluate sampling procedures; assess the extent and magnitude of yield loss caused by Pratylenchus neglectus; assess the population dynamics of Pratylenchus neglectus in cereals; determine whether resistance occurs in field crops; and, assess whether variation occurs between geographically isolated species of Pratylenchus neglectus
3
Taheri, Abdolhossein. "Interaction between root lesion nematode, Pratylenchus neglectus, and root-rotting fungi of wheat." Title page, contents and summary only, 1996. http://web4.library.adelaide.edu.au/theses/09PH/09pht128.pdf.
Full textAbstract:
Bibliography: leaves 307-329. This study concludes that in soils in South Australia where root-rotting fungi and P. neglectus exist together, root disease of wheat is caused by their combined effect. Evidence suggests that P. neglectus not only contributes to this interaction through mechanical wounding of roots, but also causes biochemical and physiological changes in plants, making them more prone to fungal infection.
4
Zuck, Peter Christopher. "Evaluation of alternative crops for management of Pratylenchus neglectus in Montana winter wheat production." Thesis, Montana State University, 2010. http://etd.lib.montana.edu/etd/2010/zuck/ZuckP0510.pdf.
Full textAbstract:
A series of crop rotations were evaluated for their impacts on soil-borne populations of root lesion nematodes, Pratylenchus neglectus. Population changes, measured as the ratio of P. neglectus adults counted at harvest to those counted at planting time, was recorded under a series of two-year rotations alternating winter wheat with either fallow, barley, pea, lentil, canola, and camelina. Fallow, barley, pea, and camelina were found to have a neutral effect on nematode populations (p < 0.001). Winter wheat and canola caused significant increases in populations, while lentils caused significant decreases (p < 0.001). Populations were sustained through winter following winter wheat and barley, but not canola, camelina, pea, lentil, or fallow treatments (p < 0.001). In addition to the rotation study, cultivars of barley and canola were evaluated for their resistance to P. neglectus. Greenhouse trials for barley showed significant differences among 19 cultivars tested (p < 0.001), with a 5-fold difference in P. neglectus multiplication separating the least- from the most resistant. Separation among cultivars was not found with canola (p = 0.20). The information gathered in this study will help Montana wheat growers better understand the impacts of their crop selections on this important pest.
5
Vanstone, Vivien Alison. "The role of fungi and the root lesion nematode, Pratylenchus neglectus, in damaging wheat roots in South Australia." Title page, summary and contents only, 1991. http://web4.library.adelaide.edu.au/theses/09PH/09phv281.pdf.
Full textAbstract:
Includes bibliographical references (leaves 265-296). Pathogens associated with root damage were investigated in the Murray Mallee region of South Australia over the 1987-1989 growing seasons. Occurence of fungal species and the root lesion nematode (Pratylenchus neglectus) was assessed, and related to the appearance and severity of symptoms on the roots. Field experiments were supplemented with innoculation tests in the glasshouse and laboratory.
6
Farsi, Mohammad. "Genetic variation for tolerance and resistance to Pratylenchus neglectus / by Mohammed Farsi." 1995. http://hdl.handle.net/2440/18625.
Full textAbstract:
Bibliography: leaves 318-347.ix, 347 [24] leaves : ill. (some col.) ; 30 cm.
Title page, contents and abstract only. The complete thesis in print form is available from the University Library.
A major problem in the production of agricultural crops including wheat, is the damage caused by destructive plant parasitic nematodes, among these the root lesion nematode (Pratylenchus spp.) The association of P. neglectus with fungi in ceraeal root disease has been reported. Infection is associated with leaf yellowing, which reduces plant photosynthesis and grain yield. In nematode infested soil, well fertilized crops are usually less affected.
Thesis (Ph.D.)--University of Adelaide, Dept. of Plant Science, 1996?
7
Farsi, Mohammad. "Genetic variation for tolerance and resistance to Pratylenchus neglectus / by Mohammed Farsi." Thesis, 1995. http://hdl.handle.net/2440/18625.
Full textAbstract:
Bibliography: leaves 318-347.ix, 347 [24] leaves : ill. (some col.) ; 30 cm.
A major problem in the production of agricultural crops including wheat, is the damage caused by destructive plant parasitic nematodes, among these the root lesion nematode (Pratylenchus spp.) The association of P. neglectus with fungi in ceraeal root disease has been reported. Infection is associated with leaf yellowing, which reduces plant photosynthesis and grain yield. In nematode infested soil, well fertilized crops are usually less affected.
Thesis (Ph.D.)--University of Adelaide, Dept. of Plant Science, 1996?
8
Vanstone, Vivien Alison. "The role of fungi and the root lesion nematode, Pratylenchus neglectus, in damaging wheat roots in South Australia / Vivien Alison Vanstone." Thesis, 1991. http://hdl.handle.net/2440/19581.
Full textAbstract:
Includes bibliographical references (leaves 265-296).vi, 296 leaves, [14] leaves of plates : ill. (some col.), maps ; 30 cm.
Pathogens associated with root damage were investigated in the Murray Mallee region of South Australia over the 1987-1989 growing seasons. Occurence of fungal species and the root lesion nematode (Pratylenchus neglectus) was assessed, and related to the appearance and severity of symptoms on the roots. Field experiments were supplemented with innoculation tests in the glasshouse and laboratory.
Thesis (Ph.D.)--University of Adelaide, Depts. of Plant Science and Crop Protection, 1991
9
Jayatilake, Dimanthi Vihanga. "Fine mapping of nematode resistance genes Rlnn1 and Cre8 in wheat (Triticum aestivum)." Thesis, 2014. http://hdl.handle.net/2440/97789.
Full textAbstract:
The root lesion nematode Pratylenchus neglectus and the cereal cyst nematode Heterodera
avenae cause significant yield damage to wheat (Triticum aestivum L.) and crops that are
grown in rotation with wheat. The focus of this thesis is on two loci in wheat, Rlnn1and
Cre8, which confer resistance against P. neglectus and H. avenae, respectively, with an
overall scientific goal of characterizing these two resistance loci as an initiative towards
isolation of the causal gene(s) and identification of diagnostic molecular markers for the
use in marker-assisted selection in wheat breeding programmes.
The thesis presents improvements to an existing Excalibur/Kukri linkage map of
chromosome 7A by adding Lr20 (a gene for resistance against leaf rust caused by Puccinia
triticina), Sr15 (a gene for resistance against stem rust caused by P. graminis), Psy-A1 (a
phytoene synthase gene), Cat3-A1 (a catalase gene) and 59 new molecular markers. The
genomic location of the Rlnn1 quantitative trait locus (QTL) was confirmed as the distal
end of long arm of chromosome 7A (7AL). It coincides with the position of Lr20/Sr15,
Psy-A1, Cat3-A1 and 34 molecular markers.
Based on the findings that 1) some markers that collocate with the resistance genes
Lr20/Sr15 and Rlnn1 are widely separated in mapping populations that do not segregate for
these genes; 2) when anchored to a chromosome 7A syntenic build, these markers spanned
a 0.9-Mb region; and 3) no recombinants were found in a large population of recombinant
inbred lines, it is suggested that the clustering of molecular markers/genes/QTL at the
distal end of 7AL is due to suppressed recombination. The suppressed recombination in
Excalibur may be a result of a translocation. This suggestion is based on 1) phylogenetic
analysis of Psy-A1 alleles; 2) marker amplification patterns that suggested that sequences
at the distal end of 7AL in Excalibur are very different from those in Kukri and Chinese Spring; 3) amplicons observed for a normally 7B-specific marker that collocates with
Rlnn1 on 7AL, and 4) FISH images that revealed an unknown putative translocation in
Excalibur that is absent in Kukri. It seems likely that the Rlnn1-containing segment of 7AL
may have been translocated from a 7B-like chromosome arm with an unknown ancestry.
Such a translocation could have pre-dated hexaploidisation and occurred in a tetraploid or
diploid ancestor.
The thesis also presents a high-resolution genetic linkage map for a Trident/Molineux
population. This map was used to confirm the locations of three previously reported QTL
for H. avenae, including the Cre8 locus mapped as a large-effect QTL at the distal end of
the long arm of chromosome 6B (6BL), with an estimated position 0.9 cM from the closest
markers. A cross was designed and made to develop a population for future use in fine
mapping. With these materials and with the closely-linked molecular markers developed
here, Cre8 seems amenable to positional cloning.
In the research conducted for this thesis, the Rlnn1 and Cre8 resistance loci were mapped
at the distal ends of 7AL and 6BL, respectively and diagnostic markers were identified for
the use in marker-assisted selection. A suppressed recombination at the end of 7AL
impedes the prospects of cloning Rlnn1, while the research reported here have identified
suitable markers and genetic resources for cloning the Cre8 gene with a forward genetics
approach.Thesis (Ph.D.) -- University of Adelaide, School of Agriculture, Food and Wine, 2014
Book chapters on the topic "Pratylenchus neglectus"
1
Ramouthar, Prabashnie. "Pratylenchus in sugarcane: a diminishing problem?" In Integrated nematode management: state-of-the-art and visions for the future, 66–72. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789247541.0010.
Full textAbstract:
Abstract This chapter focuses on the economic importance, host range, geographical distribution, damage symptoms and biology and life cycle of Pratylenchus brachyurus, P. neglectus, P. scribneri and P. zeae infesting sugarcane in South Africa. Information on their interactions with other nematodes and pathogens, the efficacy and optimization of some recommended integrated nematode management programmes and future nematode research requirements are also presented.