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Showing 4 results for Fusarium Oxysporum
Fusarium species, the causal cumin wilt in the Khorasan-Razavi province of Iran
Javad Yousefi Nayi, Adel Pordel, Ahmad Drakhshan, Ali Nazvar,
Volume 10, Issue 2 (9-2021)
Abstract
 Yousefi-Nayi J, Pordel A, Drakhshan A, Nazvar A (2021) Fusarium species the causal cumin wilt in the Khorasan-Razavi province of Iran. Plant Pathology Science 10(2):30-39.  Doi: 10.2982/PPS.10.2.30.
Introduction: Cumin is the second most popular spice worldwide after black pepper. It is planted with a large acreage each year in Iran, especially in the Khorasan-Razavi province (northeastern Iran). Fungal diseases have caused great loss to this precious plant every year. This study aimed to investigate and identify the causal fungi of chlorosis and wilting of cumin in the Khorasan-Razavi province. Materials and Methods: Yellowed and wilted cumin plants were sampled from Torbat-Heydarieh, Kashmar, and Roshtkhar suburban’s farms, and fungi were isolated, purified, and identified, from their diseased tissues. The pathogenicity test of isolated fungi was carried out on a local cultivar under greenhouse conditions. Results: Two Fusarium species, including F. oxysporum with the highest frequency and F. equiseti with the lowest frequency, were isolated from diseased cumin plants. Between 43 isolates of these fungi in the pathogenicity test, twenty-four isolates of F. oxysporum caused wilt, and nine isolates of  F. equiseti caused chlorosis and leaf fall, in the plant. Conclusion: F. oxysporum, and F. equiseti are known as the causal agents of cumin wilt and chlorosis in the Khorasan-Razavi province of Iran.
 
Fusarium wilt disease of date palm
Azadeh Goudarzi,
Volume 12, Issue 1 (3-2023)
Abstract
Goudarzi, A. (2023). Fusarium wilt disease of date palm. Plant Pathology Science, 12(1), 64-73.       
Abstract
Fusarium wilt disease is known as one of the most destructive and fatal diseases of date trees in many date-producing areas of the world, especially date-producing countries in Africa. Currently, a significant portion of date orchards in Morocco and the western and central Sahara of Algeria are affected by Fusarium wilt disease. The economic losses caused by Fusarium wilt disease of dates, especially in the incidence of severe epidemics, are significant. Over the past century, the disease has killed more than 12 million palm trees in Morocco and about three million palm trees in Algeria. Fusarium oxysporum (Schltdl.) f. sp. albedinis, a soil-borne vascular pathogen, is known to cause Fusarium wilt disease of dates. The economic losses caused by this disease are very significant, especially in the incidence of severe epidemics, and in some areas, the Fusarium wilt epidemic has destroyed more than 70% of the date fruits. Integrated disease management strategies include the use of resistant or tolerant cultivars, prevention of introduction of the disease causal agent into disease-free areas, eradication of the disease, biological control and chemical control. This disease has not been reported from date-producing areas of Iran, although similar symptoms to Fusarium wilt have been observed in some date orchards of Hormozgan province.

Screening eight tomato varieties for resistance to Fusarium wilt disease
Leila Rasouli , Mehdi Sadravi , Kavoos Keshavarz ,
Volume 12, Issue 1 (3-2023)
Abstract
Rasouli, L., Sadravi, M., & Keshavarz, K. (2023). Screening eight tomato varieties for resistance to Fusarium wilt disease. Plant Pathology Science, 12(1), 46-52.     
Introduction: Fusarium wilt caused by soil-borne fungus Fusarium oxysporum f. sp. lycopersici (Fol) is one of the most important diseases of tomatoes in the world. Identification and cultivation of resistant varieties is an environmentally friendly method of disease management that leads to the production of a chemical-free and clean yield. This research was conducted to evaluate the reactions of eight tomato varieties to the disease and their correlation with peroxidase enzyme. Materials and Methods: Wilted tomato plants were sampled in the greenhouses of southwestern Iran and after isolation and purification and studying the morphological characteristics, two Fol  isolates were identified. The reactions of eight varieties vs. Kingston, Dafnis, Super chef, Karnak, CHpooya, Earlypooya, Superpooya, and CH to these two isolates were investigated in a factorial experiment with a completely randomized statistical design with four replications for each treatment under greenhouse conditions. The disease severity index and the vegetative and reproductive indices of the plant were determined. The level of peroxidase enzyme in the leaves of plants of each treatment was measured by spectrophotometric method at 470 nm wavelength and its correlation coefficient was determined with the disease severity index. Results: Analysis of the variance of these experimental data revealed a significant difference between Fol isolates in pathogenicity and interaction between Fol isolates and varieties. Fol2 isolate was more aggressive than Fol1 and CH was moderately susceptible, and  Earlypooya, Karnak, Superpooya, Dafnis, CHpooya, were moderately resistant, while Kingston and Super chef  were completely resistant to this hyper-virulent isolate of  the pathogen and disease. The peroxidase level had negatively correlated with the disease severity index. Conclusion: Among these varieties, Kingstone and Super chef are resistant to the disease. Peroxidase levels can be used as a resistance marker to assess how different tomato varieties react to the disease.

Two Fusarium species pathogenic to sugarcane in Khuzestan Province, Iran
Samaneh Dashtipoor, Dostmorad Zafari,
Volume 13, Issue 1 (9-2023)
Abstract

Sugarcane is an important commercial product that is used for sugar production and many industrial uses. This research was conducted to identify Fusarium species causing sugarcane pokabong disease in plants with symptoms of vascular wilting and red veins in the leaves. This disease is one of the most important and spreading diseases of sugarcane in the world, which leads to a significant decrease in the sugarcane crop. The purpose of this research was to identify Fusarium species causing this disease in Khuzestan province of Iran. The sugarcane fields of this province were visited and samples were taken from the diseased tissues of the plants. The diseased tissues were cultured on potato dextrose agar medium after washing and surface disinfection. Morphological identification of the species was done using valid identification keys, and the combined analysis method of the data of tef 1α and rpb2 gene regions was used to confirm their identity. The pathogenicity test was performed and the results indicated that the identified species were pathogenic. Fusarium culmorum and Fusarium oxysporum species were identified as sugarcane pathogens. This is the first report of F. culmorum and F. oxysporum species as pathogens of sugarcane in Iran.


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