CANES WILTING WITH COLLAR AND ROOT ROT OF RASPBERRY CAUSED BY PHYTOPHTHORA PSEUDOCRYPTOGEA IN BULGARIA

A wide range of herbaceous and woody plant species are known as host plants of Phytophthora pseudocryptogea, a relatively newly described species. Recently P. pseudocryptogea was isolated from raspberry plants in Bulgaria. Diseases plants were found in the 4 to 5 years old variety Ljulin plants on the biological production orchards in Kostenets region. Canes suddenly wilt and turn brown at the onset of warm temperatures. The plants manifested disease symptoms such as collar and root rot. The precise species determination of obtained isolate was done on the basis of the colony and asexual spores morphology and sequence analyses of the ITS region of the nuclear DNA. The pathogenicity of the fungus was tested by detached leaf bioassay on several raspberry cultivars in the laboratory.