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New data and observations on the general distribution of powdery mildew of Platanus × hybrida, P. orientalis and P. occidentalis in Hungary.
Vajna, L.; Süle, S.; Agroinform Kiadó, Budapest, Hungary, Növényvédelem, 2011, 47, 10, pp 421-427, 20 ref. As a summary of three-year observations and investigations authors first present data on the general distribution and sporadic epidemic occurrence of Erysiphe platani on Platanus × hybrida. At the same time this is the first record of Erysiphe platani on ...
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First report of Plasmopara obducens on impatiens (Impatiens walleriana) in Hungary.
Vajna, L.; British Society for Plant Pathology, UK, New Disease Reports, 2011, 24, pp Article 13, 5 ref. In July 2010, diseased impatiens (Impatiens walleriana) hybrids were found with symptoms of downy mildew in a city garden in Budapest, HUngary. Stunting of plants and poor flowering, curling of upper leaves and intensive development of a white sporangioph...
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First report of Sclerotium cepivorum causing white rot of garlic in Hungary.
Bakonyi, J.; Vajna, L.; Szeredi, A.; Tímár, E.; Kovács, G. M.; Csősz, M.; Varga, A.; British Society for Plant Pathology, UK, New Disease Reports, 2011, 23, pp Article 5, 4 ref. In June 2008, premature yellowing and wilting of foliage were observed in a 32 ha commercial garlic (cv. Arno) within the biggest Allium-producing region of Hungary, 200 km southeast of Budapest. The underground parts of affected plants were covered with ...
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Characterization of a Plasmopara species on Ambrosia artemisiifolia, and notes on P. halstedii, based on morphology and multiple gene phylogenies.
Choi YoungJoon; Kiss, L.; Vajna, L.; Shin HyeonDong; Elsevier Ltd, Oxford, UK, Fungal Biology, 2009, 113, 10, pp 1127-1136 Common ragweed (Ambrosia artemisiifolia) is an invasive and highly allergenic plant species, on which two species, Plasmopara halstedii and Plasmopara angustiterminalis, have been recognized to cause downy mildew disease. In this study, morphological and ...
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Extensive planting of gallery pear in Hungary. Disease and pest consequences at present and to be expected (a case study).
Vajna, L.; Agroinform Kiadó, Budapest, Hungary, Növényvédelem, 2010, 46, 4, pp 161-167, 17 ref. The case study summarises first experiences of the extensive planting of Gallery pear in Budapest, Hungary. It provides information on pathogens registered worldwide on Pyrus calleryana, and of fungal pathogens identified recently in Hungary. First record...
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Powdery mildew, a new disease of Gallery pear (Pyrus calleryana Decaisne): shall we have to control the pathogen or the host in the future?
Vajna, L.; Kiss, L.; Agroinform Kiadó, Budapest, Hungary, Növényvédelem, 2008, 44, 10, pp 489-494, 12 ref. The paper provides detailed information on the occurrence of powdery mildew on Gallery pear trees (Pyrus calleryana) in Hungary. The pathogen has been identified as Podosphaera leucotricha on the basis of morphological and molecular investigations. It als...
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First report of bacterial leaf and flower spot of Zinnia elegans caused by Xanthomonas campestris pv. zinniae in Hungary.
Schwarczinger, I.; Vajna, L.; Süle, S.; Blackwell Publishing, Oxford, UK, Plant Pathology, 2008, 57, 2, pp 367, 4 ref. In 2006, a serious outbreak of bacterial leaf and flower spot disease was observed on zinnia (Z. elegans cultivars Capricio and Mondo) grown in several parks in Budapest, Hungary. The disease initially appeared on leaves as diffuse, transluscent, circular...
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Circulation of plant pathogens in our global world: expect the unexpected?
Vajna, L.; Agroinform Kiadó, Budapest, Hungary, Növényvédelem, 2007, 43, 7, pp 307-313, 25 ref. In spite of the efforts of international plant protection organizations and local, national plant quarantine services, plant pathogens (viruses, bacteria and fungi) are more or less freely introduced from one country or continent to another. This occurs t...
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Downy mildew epidemic on common ragweed in Hungary caused by Plasmopara halstedii.
Vajna, L.; Blackwell Science, Oxford, UK, Plant Pathology, 2002, 51, 6, pp 809, 1 ref. In the autumn of 2001, downy mildew epidemic on common ragweed (Ambrosia artemisiifolia) occurred in large areas of Central Hungary. The causal organism was isolated and identified as Plasmopara halstedii based on microscopic examinations. This is thought...
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First report of Phyllachora ambrosiae in Europe causing epidemics on common ragweed.
Vajna, L.; Bohár, G.; Kiss, L.; Plant Disease, 2000, 84, 4, pp 489, 2 ref. In July 1999 Ambrosia artemisiifolia var. elatior exhibiting irregular brown spots with yellowish halos were collected from roadside sites in Hungary. The fungus was isolated and identified as P. ambrosiae.
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