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Showing 4 results for Dieback

Abbas Salahi Ardakani,
Volume 1, Issue 2 (9-2012)

Citrus gummosis disease cause canker accompanied by gum exudates, crown and root rot, twig dieback, and decline of citrus trees. This disease has been reported from Khuzestan and Fars provinces, now infected by in parts of Kohgiluyeh and Boyerahmad province (southwest Iran), namely: Molabarfi, Bidestan, Posht-e-koh, Tol-e-mavizi, Bidzard, Chaharbish-e-olia and Chaharbish-e-sofla from Gachsaran town and Cheshm-e-belghis, Dehborji, Spar and Marin from Kohgiluyeh town. Sour lemon, sweet lemon, big sour lemon and orange were more infected respectively. Pathogen identified as Phytophthora nicotianae. As it is epidemic in this province for planting diseased seedlings, incorrect planting method, stalk sensitivity, incorrect irrigation method, can manage by planting healthy certified seedlings on sour orange stalk, correction planting and irrigation methods, chemical control, and biological control with antagonistic fungi or bacteria.
Mohammad Abbasi Domshahri, Reza Ghaderi,
Volume 8, Issue 1 (3-2019)

Abbasi Domshahri M. and Ghaderi R. 2019. Causal agents of citrus trees decline in Fars province . Plant Pathology Science 8(1):15-23. DOI: 10.2982/PPS.8.1.15.
 During recent years, citrus trees decline has becoming one of the most important factors of limiting the area of citrus orchards in the south of Iran including Fars province. Different biotic and abiotic agents were attributed to citrus decline worldwide, but it appears that some abiotic stresses including soil drought, and soil or water salinity, as well as some infectious diseases including gummosis, dieback, citrus nematode and witch’s broom are more important in Fars province. This is an attempt to gather information of the potential agents of complex diseases known as “citrus trees decline”, as well as, discussion on management strategies of citrus decline in Fars province.

Noorallah Hassanpour, Mehdi Arzanlou,
Volume 8, Issue 2 (9-2019)

Hasanpour N and Arzanlou M (2019) Ash dieback disease. Plant Pathology Science 8(2):70-76. DOI:10.2982/PPS.8.2.70
Ash tree is an important symbol of the urban green space in the world, which is also used in the construction of home and sport equipment. Ash dieback disease caused by Hymenoscyphus fraxineus is widespread in the most forests and green areas of the European countries. The disease was first observed in Poland and Lithuania in the early 1990s. The geographical spread of the pathogen has increased in the last two decades and so it is now is considered as a serious threat to the Ash trees. Initial infection is caused by ascospores released from apothecia formed on the previous year's leaves dropped. Disease management can be achieved by prevention and quarantine methods, sanitation, identification and cultivation of resistant cultivars and the use of chemical fungicides. The disease has not been reported from Iran so far, however, the possibility of entering the disease in the future is unclear. Therefore in this article we discuss the various aspects related to this disease including symptoms, pathologic biology, and management methods.

Soghra Ghasemi-Doodaran, Mahdi Davari,
Volume 9, Issue 2 (8-2020)

Ghasemi-Doodaran S, Davari M (2020) Fungal diseases of hazelnut in Iran. Plant Pathology Science 9(2):85-94. DOI: 10.2982/PPS.9.2.85.
Hazelnut tree has natural habitats in northwestern Iran in the forests of Ardabil and Gilan provinces. Decline disease is a threatening agent of hazelnut trees in these areas. Symptoms of the disease include weakness, reduced growth, leaf fall and dieback of the branches, branch and trunk canker and root rot that eventually lead to the gradual death or decline of the tree. In Iran the fungi cause hazelnut decline disease, Diaporthe amygdali, and Cytospora fuckelii as canker and Fusarium semitectum, F. lateritium, F. anthophilum and Armillaria mellea as root rot causative agents. This article describes symptoms of hazelnut decline in Iran, pathogenic fungi and management strategies.

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