نماتدهای انگل گیاهی مرتبط با درختان نخل در بخش‌هایی از جنوب ایران

Palms are invaded by several plant parasitic nematodes that cause their growth and development reduction. In order to study the plant-parasitic nematode fauna in palm orchards in some parts of the southern Iran, 104 soil samples were collected from five regions including, Asaluyeh, Abpakhsh, and Dalaki (Bushehr province), Ghir and Karzin (Fars province), and Behbahan (Khuzestan province) in March 2024. The nematodes were extracted, fixed and transferred to glycerin according to the De Grisse method. Permanent slides were prepared from the extracted nematodes and studied with a light microscope. In this study, 14 genera of plant parasitic nematodes belonging to infraorder Tylenchomorpha including Aphelenchus, Basiria, Ditylenchus, Ecphyadophora, Filenchus, Helicotylenchus, Hemicycliophora, Meloidogyne, Merlinius, Paratylenchus, Pratylenchus, Rotylenchus, Scutylenchus, and Tylenchorhynchus were identified. The frequency percentages of Helicotylenchus, Meloidogyne, Merlinius, Paratylenchus, and Pratylenchus in Ghir and Karzin regions were calculated by 23%, 44%, 2%, 2%, and 13%, respectively; those for Meloidogyne, Paratylenchus, and Pratylenchus in Abpakhsh region were calculated by 35%, 55%, and 2%, respectively; those for Merlinius, Paratylenchus, Pratylenchus and Meloidogyne in Asaluyeh region were calculated by 6.6%, 62.5%, 2.9% and 8.1% respectively, those for Helicotylenchus, Merlinius, and Pratylenchus in Behbahan region were calculated by 80%, 7.5%, and 6.8%, respectively; and those for Helicotylenchus and Pratylenchus in Dalaki region were calculated by 92.3% and 7.7%, respectively. Eight genera Aphelenchus, Ditylenchus, Ecphyadophra, Hemicycliophora, Meloidogyne, Paratylenchus, Rotylenchus, and Scutylenchus are new records from Iranian palm trees. Additionally, two genera Ecphyadophora and Scutylenchus are new records in the world for the palm tree. Species identification based on morphological and morphometric characteristics is in progress.