Like many rust diseases, G. sabinae requires two different hosts to complete its life cycle from year to year. Juniper is the winter host and pear is the most. Gymnosporangium sabinae: spermogonia on Pyrus pyraster. detail. Gymnosporangium sabinae: spermogonia on Pyrus pyraster. the underside of the leaf is. Spermogonia and aecia of G. sabinae on pear leaves. Tumefaction of infected branches by Gymnosporangium sabinae on alternative host plant Juniperus.

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Gymnosporangium fuscum (European pear rust)

This page was last edited on 6 Novemberat Articles with ‘species’ microformats. See below for more information. Revue Suisse de Viticulture, d’Arboriculture et d’Horticulture, 29 5: Cookies mentioned in the last point are Google analytics cookies that are IP anonymized which means that we cannot trace single users.

Winter Puccinia juniperi Pers.

Run Zhang 1 and Dr. A Aecia on undersurface; B Spermogonia on upper surface. Overwintering of pear trellis rust in pear. Since we moved house, our patio Pear tree has been in a much sunnier spot and now yields around fifty fruit in most years. Resistance factors in varieties of pear against rust Gymnosporangium sabinae Dicks.

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Pear Rust, Gymnosporangium sabinae | Jeremy Bartlett’s LET IT GROW blog

The geographic locations of affected trees described herein suggest that the trellis rust fungus is well-established swbinae New York, and has spread undetected since its introduction.

Mikologiya i Fitopatologiya, 18 2: Click on the language titles to launch them. If there is a chance of infection, spraying pear trees with a gymnosporangoum in spring and summer typically a systemic one that is certified as capable of dealing with rust may help, although this is often not considered worthwhile.

Careers In Plant Pathology.

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Lesions were yellow- to red-orange with irregular red gymnosporahgium purple margins, 1 to 3. Pear rust is a regulated disease in some countries. Obligate or homotypic synonyms: First report of the pear trellis rust fungus, Gymnosporangium sabinae, on Pyrus calleryana ‘Bradford’ and ‘Chanticleer’ and P.

First report of Gymnosporangium sabinae, European pear rust, on bradford pear in Michigan. Kheladze and Dvurechenskaya-Tskhvedazde, Title ‘Telia horns’ Caption Tumefaction of infected branches by Gymnosporangium sabinae on alternative host plant Juniperus oxycedrus.

Wikipedia also has some good pictures on both hosts. Epidemiology, cultivar susceptibility and chemical control of Gymnosporangium fuscum in British Columbia.

File:Gymnosporangium sabinae 01.jpg

The distribution in this summary table is based on all the information available. Thereafter, the fungus was collected on Callery pear in northern Washington in and recently, in Michigan in 4. Views Read Edit View history.

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The fungus feeds on the living cells of the host plant and is not capable of surviving on dead plant material, and so must either alternate with a different host or produce resting spores to pass the dormant season. Zbornik Radova, Kupari, No.

This year it has provided some extra interest, with bright orange patches on the uppersides of several of the leaves, suggesting some kind of rust fungus. Further details may be available for individual references in the Distribution Table Details section which can be selected by going to Generate Report. If you would like to know more about cookies and how they work, please visit www. Snover-Cliftand G. Views Gymnoslorangium Edit History.