Unveiling the structure and distribution of plant-parasitic nematode communities in soybean fields in southern of the Brazil

Our study aimed to assess the structure and distribution of plant-parasitic nematodes in soybean [ Glycine max (L.) Merr] in the south of Brazil. High taxonomical diversity was found, with records of 10 genera of plant-parasitic nematodes (PPNs), including important pests, such as Meloidogyne (mostl...

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Bibliographic Details
Published in:European journal of plant pathology 2021-06, Vol.160 (2), p.457-468
Main Authors: Márquez, Luis Alejandro Yánez, Gomes, Cesar Bauer, Bellé, Cristiano, Dallagnol, Leandro José, de Araújo Filho, Jerônimo Vieira
Format: Article
Language:English
Subjects:
Agriculture
Bioclimatology
Biomedical and Life Sciences
Ecology
Epidemiology
Esterase
Genera
Glycine max
Helicotylenchus
Life Sciences
Meloidogyne
Nematodes
Pests
Plant communities
Plant Pathology
Plant Sciences
Pratylenchus
Soybeans
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Summary:Our study aimed to assess the structure and distribution of plant-parasitic nematodes in soybean [ Glycine max (L.) Merr] in the south of Brazil. High taxonomical diversity was found, with records of 10 genera of plant-parasitic nematodes (PPNs), including important pests, such as Meloidogyne (mostly M. javanica with small esterase variability), Pratylenchus (mostly P. brachyurus ) and Helicotylenchus spp. The Shannon-Weaver index (H ′ ) ranged from 0 to 1.23 (mean = 0.37), whereas Pielou’s evenness (J) ranged from 0 to 1 (mean = 0.51). The amount of PPNs (0 to 22,050 per 250 cm 3 soil, and 0 to 15,500 per 10 g roots), incidence and abundance for Meloidogyne (28.6%; 50 to 19,250 per 250 cm 3 ), Pratylenchus (45.1%; 50 to 550 per 250 cm 3 ), Helicotylenchus (91.2%; 50 to 9,150 per 250 cm 3 ), Tylenchus (34.1%; 50 to 550 per 250 cm 3 ), Xiphinema (33%; 50 to 250 per 250 cm 3 ), Mesocriconema (15.4%; 50 to 2,000 per 250 cm 3 ), Rotylenchus (8.8%; 50 to 1,900 per 250 cm 3 ), Hemicycliophora (1.1%; 50 per 250 cm 3 ), Discocriconemella (1.1%; 950 per 250 cm 3 ) and Tylenchorhynchus (1.1%; 50 per 250 cm 3 ) were related differently to the bioclimatic variables under analysis. Our findings provide an update for the status of PPNs in the south of Brazil and suggest important epidemiological issues linked to the management of these pests in the near future.
ISSN:0929-1873
1573-8469
DOI:10.1007/s10658-021-02256-1