Sanitary status of stone fruits, olive and citrus in Palestine
1999
Jarrar, S.
A total of 1420 samples from commercial orchards, collection plots and nurseries, of the main crop-growing areas, were collected in January 1999. ELISA, immunoprinting, mechanical inoculation, graft transmission and dsRNA techniques were used for the detection of the main transmissible pathogens. 900 of stone fruits trees were tested in ELISA. Viruses were detected but not nepoviruses. A spherical virus isolated from a plum tree, induces local ring lesions and deformations in Nicotiana occidentalis leaves. A total of 140 trees of citrus were tested for the presence of citrus tristeza (CTV), citrus psorosis (CPV), citrus variegation (CVV), and citrus vein enation (CVEV) viruses and Spiroplasma citri. 63 per cent of the 22 olive samples analysed by dsRNA showed multiple bands, indicating infections of viral origin.
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