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Showing 4 results for Pratylenchus
Root Lesion Nematode Pratylenchus thornei
Ehsan Fatemi , Habiballah Charehgani,
Volume 7, Issue 1 (3-2018)
Abstract

Fatemi E. and Charehgani H. 2018. Root lesion nematode Pratylenchus thornei. Plant Pathology Science 7(1):28-39.

Root lesion nematodes are one of the most important and fatal plant parasites. They often move between soil and host plants roots, during all stages of their life. Root lesion nematodes migrate and feed within the roots, therefore they cause necrotic lesions on the surface and throughout the cortex of infected roots. Their attack to the root can result stunting of plant root system as well as reduction in plants growth and eventually host kill. Different management methods such as the planting of resistant genotypes, crop rotation, fallow periods and use of biological control agents are successfully practiced against these nematodes. In this paper a brief discussion of economic damages, importance, taxonomy, biology and symptoms of Pratylenchus thornei attack and the most efficient management methods are presented.


Report of six plant parasitic nematodes from the orchards of Rafsanjan region, Kerman Province, Iran
Former Ms.c. Saeed Sharify Rostam-Abady, Mahdieh Rostami, Farahnaz Jahanshahi Afshar, ,
Volume 12, Issue 2 (9-2023)
Abstract
Sharify Rostam-Abadi S, Rostami M,  Jahanshahi Afshar F, Ardeshir F (2023) Report of six plant parasitic nematodes from the orchards of Rafsanjan region, Kerman Province, Iran. Plant Pathology Science 12(2):41-52.
Introduction: In the suburban area of Rafsanjan city in Kerman Province, Iran, there are many orchards infested with plant parasitic nematodes. Therefore, it was necessary to identify the plant parasitic nematodes in the orchards of this region. Materials and Methods: In 2018 and 2019, some soil samples were taken around the roots of apricot, peach, pomegranate, apple, cherry and persimmon trees in this area. Nematodes were extracted by two methods, tray and sieve-centrifuge, and after fixation, they were transferred to pure glycerin. Permanent slides were examined with a bright field microscope and extracted nematodes were identified using diagnostic keys and original descriptions. Results: Seven nematodes from the infraorder Tylenchomorpha, belonging to five families including: Tylenchidae, Pratylenchidae, Tylenchulidae, Criconematidae and Anguinidae were identified. Root-lesion nematode (Pratylenchus penetrans), pin-nematode (Paratylenchus neoamblycephalus) and Criconematid (Mesocriconema xenoplax) were the most important plant parasitic nematodes in fruit orchards of this region. Conclusion: Due to the presence of some important and damaging nematodes in the orchards of Rafsanjan, it is recommended to implement appropriate management methods and monitor the population of important plant parasitic nematodes.


 
Root-lesion and cyst nematodes of vegetable and cucurbits fields in the suburbs of Rumeshkan city, Lorestan province, Iran
Fahima Yarahmadi, Mostafa Darvishnia, Kourosh Azizi,
Volume 12, Issue 2 (9-2023)
Abstract
Yarahmadi F, Darvishnia M, Azizi K (2023) Root-lesion and cyst nematodes of vegetable and cucurbits fields in the suburbs of Rumeshkan city, Lorestan province, Iran. Plant Pathology Science 12(2):53-65.
Introduction: Root lesions and cyst nematodes can cause serious damage and loss in vegetable and squash production. This research aimed to identify these important plant parasitic nematodes in the fields of these plants in the suburbs of Rumeshkan city, Lorestan province, Iran. Materials and Methods: Forty-five soil and root samples were collected from vegetable and squash fields in the region, in 2021. The nematodes were extracted using the tray method and fixed using the modified de Grisse method and transferred to glycerol. After the permanent microscopic slides were prepared, the morphological characteristics of each nematode were examined using a bright-field microscope equipped with a digital camera and then identified using valid keys. Results: The lesion nematodes were identified as Pratylenchus speijeri, P. neglectus and P. thornei and the cyst nematode as Heterodera schachtii. This is the first report and description of P. speijeri from Iran and also the first report of H. schachtii from lettuce in Iran. Conclusion: Due to the presence of these important plant parasitic nematodes on these plants in this region, appropriate management practices need to be implemented.


 
Root parasitic nematodes of sugar beet in Khorasan Razavi Province, Iran
Fatemeh Azad Disfani, Farahnaz Jahanshahi Afshar, Mahdi Toloui-Nasab, Majid Shahi Bajestani,
Volume 14, Issue 1 (2-2025)
Abstract
Plant-parasitic nematodes are considered major pathogens of sugar beet, causing significant yield losses both quantitatively and qualitatively. This study was conducted to determine the distribution and population density of plant-parasitic nematodes in sugar beet fields under the jurisdiction of the Jovain Industrial and Agricultural Company, located in Razavi Khorasan Province, an area playing a vital role in the country's sugar beet supply. A total of 150 soil samples were collected from the rhizospher of sugar beet plants across five regions: Neqab, Azadvar, Rah-Chaman, Hokmabad, and Qazlqarshi, in 2022. The samples were transferred to the laboratory to examine the distribution of plant-parasitic nematodes. Nematodes were extracted using the sieving and centrifugation method, while cyst nematodes were extracted using the Fenwick can method. Identification of cyst and root-knot nematodes was carried out based on morphological characteristics of juveniles and the shape of the vulval cone of females. Twelve nematode species belonging to eight genera and seven families within the superfamily Tylenchomorpha were identified: Heterodera schachtii, Meloidogyne javanica, M. incognita, Pratylenchus thornei, P. neglectus, Merlinius brevidens, Ditylenchus myceliophagus, Scutylenchus rugosus, Tylenchorhynchus annulatus, Helicotylenchus sp., Aphelenchoides sp., and Aphelenchus avenae. Cyst and root-knot nematodes were found at frequencies of 38.3% and 17%, respectively. The Neqab region showed the highest prevalence of cyst nematodes (93.3%), while Azadvar had the highest prevalence of root-knot nematodes (60%) among all surveyed areas. Given the widespread distribution and high population densities of cyst and root-knot nematodes in certain regions, the implementation of management strategies is recommended to prevent their further spread and reduce their populations in sugar beet fields.

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