Tham khảo luận văn - đề án 'báo cáo lâm nghiệp: "the survey of some factors affecting bark lesion development caused by phytophthora cactorum on common beech and other broadleaved trees"', luận văn - báo cáo phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | JOURNAL OF FOREST SCIENCE 56 2010 3 93-100 The survey of some factors affecting bark lesion development caused by Phytophthora cactorum on common beech and other broadleaved trees V. Holub K. Cerny V. Strnadová M. Mrazkova B. Gregorová S. Gabrielová Silva Tarouca Research Institute for Landscape and Ornamental Gardening Prủhonice Czech Republic ABSTRACT The three experiments relating to the pathogenicity of Phytophthora cactorum to beech and other forest tree species were carried out. The experiments were aimed to confirm pathogenicity of the pathogen to compare its pathogenicity with the other Phytophthora species isolated from woody plants in the Czech Republic P gonapodyides P. cambivora P. citricola . P. cinnamomi P. citrophthora to confirm its substrate specificity and diverse pathogenicity to common forest tree species common beech pedunculate oak sycamore small-leaved lime black alder common ash and to determine the influence of excessive watering on the stem canker development. We found out that the tested isolate of P cactorum was more effective to the host than isolates of P gonapodyides and P cambivora. The isolates of P cinnamomi and P citrophthora caused the largest necroses. It emerged that all tested tree species were susceptible to P cactorum. The most susceptible tree species were sycamore and common beech. The most resistant tree species were common ash and pedunculate oak. The existence of substrate specificity of the pathogen was unequivocally confirmed. It was found out that the water stress could play an important role in the bark lesion development. We found out important differences in lesion development in different periods during growing season June September . Keywords artificial infection bark lesion broadleaved trees pathogenicity common beech Fagus sylvatica Phyto-phthora cactorum substrate specificity water stress Phytophthora cactorum Lebert Cohn J. Schrot is the dangerous pathogen of some broadleaved tree species belonging to .
