Plant parasitic nematode communities associated to apple orchards in the Southern Brazil

In recent years, apple ( Malus domestica Borkh) has been one the most important fruit crops in the southern part of Brazil. Despite this, research about the attack by plant-parasitic nematodes (PPNs) and/or its involvement with apple replant disease (ARD) is poorly known up to now. Our study aimed t...

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Bibliographic Details
Published in:Tropical plant pathology 2022-10, Vol.47 (5), p.626-634
Main Authors: de Ramos, Eduarda Kalena Kirsh, Pazdiora, Paulo Cesar, Dallagnol, Leandro José, de Araujo Filho, Jeronimo Vieira
Format: Article
Language:English
Subjects:
Abundance
altitude
Annual precipitation
Apples
atmospheric precipitation
Bioclimatology
Biomedical and Life Sciences
Biometeorology
Brazil
Epidemiology
Fruit crops
Fruits
Helicotylenchus
Life Sciences
Malus domestica
Mesocriconema
Morphology
Nematicides
Nematodes
Orchards
Original Article
Plant communities
plant parasitic nematodes
Plant Pathology
Pratylenchus
Pratylenchus zeae
Replant disease
risk
soil
Soil types
Soils
species
temperature
Tylenchus
Xiphinema
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Summary:In recent years, apple ( Malus domestica Borkh) has been one the most important fruit crops in the southern part of Brazil. Despite this, research about the attack by plant-parasitic nematodes (PPNs) and/or its involvement with apple replant disease (ARD) is poorly known up to now. Our study aimed to ( i ) identify and quantify the major PPNs ( morphological groups ) infesting apple growing areas in southern of Brazil; ( ii ) to evaluate the relationship between altitude, bioclimatic variables, types of soil and the occurrence and abundance of PPNs; and ( iii ) to characterize (morphologically and morphometrically) the Pratylenchus species obtained from the apple orchards. During 2020/2021 crop season, we identified five genera of PPNs with variable abundance Pratylenchus (95%; 50 to 425 specimens/250 cm 3 soil), Helicotylenchus (95%; 25 to 875 specimens/250 cm 3 soil), Tylenchus (90%; 25 to 325 specimens/250 cm 3 soil), Xiphinema (90%; 25 to 550 specimens/250 cm 3 soil) and Mesocriconema (21%; 25 to 250 specimens/250 cm 3 soil). The ecological indices were reasonably high, with values varying from 0.78 to 1.35 for H ′ and 0.63 to 0.98 for J . The annual mean temperature (BIO1) and annual precipitation (BIO12) strongly influenced the abundance values, albeit in different ways ( p  
ISSN:1983-2052
1982-5676
1983-2052
DOI:10.1007/s40858-022-00517-w