Plant Parasitic Nematodes Associated with Fruit trees in the Newly Reclaimed Soils at El-Sadat Province, Menoufia Governorate

Sweelam, Mohamed Elameen Mohamed; Abokorah, M.; Elsebaay, Waffae

doi:10.21608/ejaj.2022.218676

Plant Parasitic Nematodes Associated with Fruit trees in the Newly Reclaimed Soils at El-Sadat Province, Menoufia Governorate

Document Type : Original Article

Authors

¹ Shebin Elkom, Menoufia Univesity

² Economic Entomology and Agricultural Zoology Dept., Fac. Agric., Menoufia Univ., Egypt.

10.21608/ejaj.2022.218676

Abstract

This study aimed to identify the most important genera or species of nematodes that associate with some fruit trees and cause remarkable economic losses and to study their seasonal fluctuations in newly reclaimed soil in the city of El-Sadat, Menoufia that focused on four fruit trees, namely orange, mango, grapes and peach. Composite soil samples from the rhizosphere of the tested plants were monthly collected, where the first six months of the year 2017 represented summer period (April 2017 – September 2017) and the others represented winter period (October 2017 – March 2018). Composite soil samples from orange trees variety Naval in summer period revealed that there were four nematode genera or species, Tylenchulus semipenetrans, Pratylenchus spp., Hemicycliophora spp.and Xiphinema americanum associated with citrus (orange) trees, where citrus nematode, was the most common representing 51% of the total parasitic nematodes, followed by lesion nematode, Pratylenchus spp. as 33.8% and the dagger nematode, Xiphinema americanum has the lowest frequency of occurrence (0.1%). As for winter months, the same four previous genera were recorded, but at different frequencies of occurrence %. The most important nematode genera in the soil of mango trees variety Kit were:Meloidogyne spp.,Pratylenchus spp. and Criconemoides spp. Root- knot nematodes, Meloidogyne spp. recorded the highest frequency of occurrence% of parasitic nematodes associated with mango trees (45.8%) in summer months, followed by Pratylenchus spp. with 39.7%, while ring nematodes, Criconemoides spp. recorded the lowest incidence (14.6%). As for the winter months, the same three nematode genera in the summer months were recorded, but at different proportions. The most important nematode genera or species in the soil of grape variety Flame Seedless were:Meloidogyne spp., Pratylenchus spp., Criconemoides spp < em>. and Xiphinema americanum. The most important nematode genera or species in the soil of peach trees variety Florida were: Meloidogyne spp., Criconemoides spp.,and Xiphinema americanum. Root- knot nematode, Meloidogyne spp recorded the highest occurrence % (54.9 %) of the total parasitic nematode in summer months, followed by Criconemoides spp. (38.6 %), while the lowest percentage was for dagger nematode (6.5 %). As for the winter months, the same three nematode genera were recorded, but at different proportions.

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