INVESTIGATION OF THE OCCURRENCE OF EUROPEAN PEAR RUST (GYMNOSPORANGIUM SABINAE) ON PYRUS COMMUNIS AND JUNIPERUS SPP. IN DEBRECEN

dc.contributor.advisorTarcali, Gabor
dc.contributor.authorAous, Shaheen
dc.contributor.departmentDE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási Kar
dc.date.accessioned2025-06-20T09:12:23Z
dc.date.available2025-06-20T09:12:23Z
dc.date.created2025-05-07
dc.description.abstractEuropean pear rust is considered a serious disease in different pear farms across Europe, especially in the organic ones. This disease has not been well studied in Hungary, possibly due to the decline in pear cultivation and the country’s mostly non-mountainous topography which limits the presence of Juniper species near pear orchards. In our survey for detecting and diagnosing European pear rust caused by Gymnosporangium sabinae, and other potential Gymnosporangium species on Pomoideae and Juniperus species conducted between May 2024 and May 2025, and through using both macroscopic and microscopic and morphological characterization, only Gymnosporangium sabinae was identified. To increase diagnostic certainty, PCR (polymerase chain reaction) analysis was performed on extracted DNA to explore through DNA sequencing the phylogenetic relationship of the pathogen prevalent in this area in the next step. On the other hand, 6 Juniperus species were found to host the fungus, showing varying levels of susceptibility amongst which J. sabina showed the highest infection rate followed by J. media in terms of frequency. Literature review and our field observations in comparation with data obtained from agrometeorological station of DE AKIT DTTI Practical Garden, we suggest a strong correlation between the severity of infection and two key factors: (1) rainfall preceding and coinciding with juniper shortly before and during flowering and and pear leaf emergence, in combination with ambient humidity; and 2nd is the proximity of susceptible juniper species to pear trees. Some juniper species were found to carry minor or unnoticeable infections. Chemical treatments seem to be not challenging. However, lack of knowledge about managing the disease in organic farms raises the interest of more dedicated research, especially when removing the juniper species is not possible. Additionally, three field experiments were conducted to better understand the biology and infection mechanisms of the pathogen on pear trees after analysis of results in the next step, and to open the doors for more in-depth future research.
dc.description.coursePlant Protection
dc.description.degreeMSc/MA
dc.format.extent45
dc.identifier.urihttps://hdl.handle.net/2437/394055
dc.language.isoen
dc.rights.infoHozzáférhető a 2022 decemberi felsőoktatási törvénymódosítás értelmében.
dc.subjectPear Rust
dc.subjectFungi
dc.subjectJuniper
dc.subjectGymnosporangium
dc.subject.dspaceAgricultural Sciences
dc.titleINVESTIGATION OF THE OCCURRENCE OF EUROPEAN PEAR RUST (GYMNOSPORANGIUM SABINAE) ON PYRUS COMMUNIS AND JUNIPERUS SPP. IN DEBRECEN
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