Acta Botanica Croatica, Vol. 32 No. 1, 1973.
Izvorni znanstveni članak
A Graft Transmissible Agent from the Non-Variegated Pittosporum tobira (Thunb.) Ait
József Horváth
; Mađarska
Sažetak
A pathogen, transmissible by means of bark grafting, has been isolated from Pittosporum tobira plants showing dendritic-like vein clearing, yellowish chlorotic spots, leaf roll, terminal rosettes and leaf deformation symptoms. The material has been found and collected around Dubrovnik and the Peninsula of Lapad at the Yugoslav seashore. This disease is somewhat similar symptomatologically to the vein clearing virus disease of Pittosporum. Nevertheless, the pathogen isolated by us could not be transmitted mechanically.
Further investigations are required in order to solve the question of whether Pittosporum vein clearing disease, Pittosporum variegation disease, and Pittosporum dendritic vein yellowing disease — a name proposed for the disease described here — are caused by the same pathogen, and to establish the virus or mycoplasma nature of these pathogens. According to our preliminary observations, leafhopper species (not yet identified), which occur on Pittosporum tobira in a large number, play a possible role in the spread and distribution of the pathogen. Main aims of further investigations in this field are the identification of possible insect vectors, determination of mode of transmission of the pathogen, as well as host range studies.
Ključne riječi
Hrčak ID:
157209
URI
Datum izdavanja:
31.12.1973.
Posjeta: 1.144 *