Abstract:
In Czechoslovakia tomato bushy stunt virus (TBSV) was found for the first time in a sweet cherry tree (Prunus avium L. cv.
Kaštánka) diseased with detrimental canker of sweet cherry (ALBRECHTOVÁ et al., 1975).
When we elucidated the problem of pseudo plum pox disease we succeeded in demonstrating TBSV in two of seven trees of plum, bullace plum and gage (Prunus domestica L.) with symptoms of pseudo plum pox disease.
In addition to TBSV apple chlorotic leaf spot virus (CLSV) was found in all investigated trees.
TBSV was also present in trees severely infected with plum pox virus (PPV).
In August 1978 we carried out the investigation of the causal agent of sweet cherry trees (Prunus avium L.) decay which was manifested of withering branches, twisted leaves and red brown colour of leaves.
TBSV and tobacco necrosis virus (TNV) were isolated from the leaves and the phloem tissue of these trees.
From the shoots collected in March 1979 Pseudomonas syringae van Hall, was isolated and demonstrated by serological methods.
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