Trend to explain the distribution of root-knot nematodes Meloidogyne spp. associated with olive trees in Morocco

Ali, Nawal; Tavoillot, Johannes; Chapuis, Élodie; Mateille, Thierry

doi:10.1016/j.agee.2016.03.042

Cited by 16 publications

(15 citation statements)

References 55 publications

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“…RKN were detected in 1/2 of the nurseries and in less than 1/4 of the surveyed orchards. This corroborates with other reports which reveal only scarce detection of RKN in olive-producing areas [16]. Potential damage of these species to olive has never been properly investigated.…”

Section: Discussionsupporting

confidence: 91%

“…Meloidogyne species were characterised through biochemical (PAGE esterase phenotypes) and molecular RAPD primer (SCAR) methods [16, 21]. Est phenotype is the most instructive biochemical identification technique for Meloidogyne species [37, 38] because of its species-specificity within the Meloidogyne genus [39–41].…”

Section: Discussionmentioning

confidence: 99%

“…Est phenotype is the most instructive biochemical identification technique for Meloidogyne species [37, 38] because of its species-specificity within the Meloidogyne genus [39–41]. All the phenotypes have previously been reported on other crops [22, 42] including olive [15, 16]. Nevertheless, some variability within M. javanica populations in orchards and within M .…”

Section: Discussionmentioning

confidence: 99%

“…Previous surveys revealed scarce populations of M. arenaria , M. hapla and M. spartelensis in wild olive whereas M. javanica dominated in cultivated areas of Morocco [16]. We hypothesized that its widespread distribution might be due to inductions from nurseries.…”

Section: Introductionmentioning

confidence: 96%

“…are major PPN, causing a worldwide loss of about 50 billion Euros [13, 14]. Meloidogyne species like M. javanica, M. inconita, M. arenaria, M. hapla and M. lusitanica are known to infect olive trees [15, 16]. Recently M. baetica and M. spartelensis were also identified on wild olive trees in southern Spain and northern Morocco [17].…”

Section: Introductionmentioning

confidence: 99%

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Diversity of root-knot nematodes in Moroccan olive nurseries and orchards: does Meloidogyne javanica disperse according to invasion processes?

et al. 2017

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BackgroundRoot-knot nematodes (RKN) are major pest of olive tree (Olea europaea ssp. europaea), especially in nurseries and high-density orchards. Soil samples were collected from main olive growing areas of Morocco, to characterize Meloidogyne species and to discuss the contribution of biotic and abiotic factors in their spatial distribution.ResultsRKN were found in 159 soil samples out of 305 from nurseries (52.1% occurrence) and in 11 out of 49 soil samples from orchards (23.2% occurrence). Biochemical and molecular characterisation (PAGE esterase and SCAR) revealed the dominance of M. javanica both in nurseries and orchards with minor presence of M. incognita only in nurseries, and M. arenaria in only one nursery. RKN were distributed on aggregated basis. Frequent presence of M. javanica in orchards might have come from nurseries. In contrast, the detection of M. incognita in nurseries alone suggests that this species could not reproduce in orchards because of either the competition with other plant-parasitic nematodes or unfit local habitats. The impact of environmental variables (climate, habitat origin and physicochemical characteristics of the substrates) on the distribution of Meloidogyne species is also discussed.ConclusionOlive nurseries in Morocco are not able to guarantee the safety of rooted plants. As a result, olive production systems are exposed to strong RKN invasion risks. Consequently, the use of healthy substrates in nurseries may prevent plant-parasitic nematode induction in orchards.

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Section: Discussionsupporting

confidence: 91%