Abstract
The purpose of the present paper was to find oud about the population of bacteria collonizing hazel-nuts with black spotted symptoms of the pericarp and darkening and softening of the nucleus. Moreover, pathogenic abilities of the selected bacterial isolates towards these organs were estimated. The object of the studies conducted in the years 2000–2002 consisted of hazel-nuts, cultivar Hall’s Gigant, with the above mentioned symptoms, orginiating from commercial plantations in Motycz and Koskowola. The bacteria were isolated from diseased hazel-nuts each year, in June and August, and among the
population obtained, 42 representative cultures were chosen, which were used in physiological, biochemical and pathogenicity tests. It was shown that 3 isolates of Erwinia spp., 4 isolates of Bacillus spp. and 3 of Pseudomonas fluorescens could damage the fruitsets and fruit of hazel. The effectiveness of infection was considerably higher after inoculation of young and injured organs. Erwinia spp. were recognized as a potential pathogen of hazel-nuts. It seems that pectinolytic isolates of Bacillus spp. and Pseudomonas fluorescens might be recognized as facultative parasites which have the abilities to damage hazel-nuts
in favourable conditions.
References
Arsenijevic M., Obradovic A., 1996. Occurrence of bacterial wilt and soft rot seed cabbage plants (Brassica oleracea var. capitata L.) in Yugoslavia. J. Phytopath. 144, 6, 315–319.
Bogatko J., Sobiczewski P., 1989. Bacterial soft rot of hyacinth and trials of its control. Proceedings of the 7th International Conference of Plant Pathology. In: Plant pathogenic bacteria. Z. Klement (ed.), Budapest, 801–805.
Bradbury J. F., 1986. Guide to plant pathogenic bacteria. CAB International Mycological Institute, Ferry Lane, Kew, Surrey, England, 332 pp.
Bradbury J. F., 1988. Identification of cultivable bacteria from plants and plant tissue cultures by use of simple classical methods. Acta Hortic. 225, 27–37.
Edelsztein-Kosowa R., 1933. Bakterjoza cebuli jadalnej (Allium cepa L.). Acta Soc. Botanic. Pol. 10, 595–520.
Fokkema N. J., 1993. Opportunities and Problems of Control of Foliar Pathogenes with Microorganisms. Pestic. Sci. 37, 411–416.
Granata G., 1985. Le principali malattie del nocciolo in Italia. Inform. Fitopat. 4, 19–24.
Harling R., Kellock L. J., Chard., 1994. Pathogenicity of bacteria causing-spear (head) rot of calabrese (broccoli). 46 th International symposium on crop protection, Gent, Belgium, 3 May, 1994. Mededelingen Faculteit Landbouwkundige en Toegepaste Biologische Wetenschappen Universiteit Gent, 1994, 59, 36, 1189–1191.
Klement Z., Farkas G. L., Lovrekovich L., 1964. Hypersensitive reaction induced by phytopathogenic bacteria in the tobacco leaf. Phytopathology 54, 474–477.
Kuropatwa E., Machowicz-Stefaniak Z., Nurzyńska-Wierdak R., Zalewska E., 1997. The study of pathogenicity of bacteria isolated from garlic (Allium sativum L.) bulbs. Phytopathol. Pol. 13, 39–47.
Lelliot R. A., Billing E., Hayward A. C., 1966. A determinative scheme for the fluorescent plant pathogenic pseudomonas. J. App. Bacteriol. 28, 470–489.
Machowicz-Stefaniak Z., Zalewska E., 2000. Grzyby wystepujące na nadziemnych organach leszczyny. Monitoring Grzybów. M. Lisiewska i M. Ławrynowicz (red.), Sekcja Mikologiczna PTB, Poznań-Łódź 2000, 153–166.
Mechlenbacher S. A., 1991. Hazelnuts (Corylus). Acta Hort. 290, 789–835.
Monnet Y., 1994. Bacterial diseases associated with French vegetable crops. Type and importance of losses. Phytoma 468, 36–38.
Psallidas P. G., 1993. Pseudomonas syringae pv. avellanae pathovar nov., the bacterium causing canker disease on Corylus avellana. Plant Pathol. 42, 358–363.
Psallidas P. G., Panagopoulos C. G., 1979. A Bacterial Canker of Corylus avellana in Greece. Phytopathology 94, 103–111.
Sobiczewski P., Bryk H., Berczyński S., 1996. Evaluation of epiphytic bacteria isolated from apple leaves in the control of postharvest apple diseases. J. Fruit Orn. Plant Res. 4, 1, 35–45.
Zalewska E., 1999. Effect of phyllosphere microorganisms on the growth of Monilia coryli. Phytopathol. Pol. 18, 57–67. 84
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