New report of Biscogniauxia rosacearum as a pathogen on almond trees in Iran

[EN] Biscogniauxia species are known as fungal trunk pathogens on various tree species in the world. During a survey of trunk diseases of fruit trees conducted in Iran, a branch dieback was observed on almond trees in Kerman province (in the Southeast of Iran). Evaluation of symptomatic branches revealed wood discoloration in cross-sections and the presence of fruiting bodies of an ascomycete fungus on their bark. A total of 31 fungal isolates were obtained, 13 isolates recovered from necrotic wood tissues and 18 isolates from fruiting bodies. These isolates were subjected to morphological analysis as well as sequencing analysis of the partial ITS-rDNA and beta tubulin gene sequences. These fungal isolates were identified as Biscogniauxia rosacearum. Results of the pathogenicity tests showed that this species is pathogenic on almond shoots. Based on our knowledge, this is the first report of this species on almond trees in Iran and in the world.The first author is financially supported by the Iranian Ministry of Science, Research and Technology (MSRT) just for her 4 months stay in Spain as a part of her PhD project. However, no funding was received from MSRT for this study by the authors.Sohrabi, M.; Mohammadi, H.; Armengol Fortí, J.; León Santana, M. (2022). New report of Biscogniauxia rosacearum as a pathogen on almond trees in Iran. Journal of Plant Diseases and Protection. 129:411-417. https://doi.org/10.1007/s41348-022-00582-yS41141712

Fungal pathogens associated with branch and trunk cankers of nut crops in Iran

[EN] Branch and trunk canker diseases have become prevalent on nut crops in Iran. During 2015 to 2018, extensive field surveys were conducted on 58 almond, 43 pistachio and 80 walnut orchards in Iran to study fungal pathogens associated with symptomatic trees. One hundred and fifty-six representative fungal isolates were selected and identified based on morphological characteristics and by phylogenetic comparison of DNA sequence data. Fungal species found were Collophorina hispanica, Pleurostoma richardsiae, nine species of Phaeoacremonium (namely P. angustius, P. cinereum, P. italicum, P. fraxinopennsylvanicum, P. minimum, P. parasiticum, P. scolyti, P. tuscanum and P. viticola), 11 species of Botryosphaeriaceae (namely Botryosphaeria dothidea, Diplodia gallae, D. mutila, D. seriata, Dothiorella plurivora, Do. sarmentorum, Do. viticola, Lasiodiplodia citricola, L. mahajangana, L. theobromae and Neofusicoccum parvum), four species of Diatrypaceae (namely Cryptosphaeria pullmanensis, Diatrype whitmanensis, Eutypella citricola and E. vitis) and two non-identified Eutypella spp. (Eutypella sp. 1 and Eutypella sp. 2). Some of these species represent new reports in Iran and/or are reported for the first time in their respective hosts. Pathogenicity tests demonstrated that most of these fungi were pathogenic to inoculated almond, pistachio and walnut shoots. 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An opportunistic resource management model to overcome resource‐constraint in the Internet of Things

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