The Journal of Horticultural Science & Biotechnology
Vol. 50 No: 1
Virus Infection of Delphinium in Britain
A.H. AHMED and K.W. BAILISS
The viruses cucumber mosaic (CMV), broad bean wilt (BBWV), arabis mosaic (AMV), strawberry latent ringspot (SLRV), cherry leaf roll (CLRV), raspberry ringspot (RRSV) and potato virus X (PVX) were isolated from delphinium plants in Britain. They were identified by host range, electron microscopy and serology.
CMV and BBWV were most prevalent and widespread. Infected delphinium plants usually showed diverse symptoms that were either associated with individual viruses or virus mixtures. Severe stunting and leaf deformation was associated with BBWV alone or with mixed infections by BBWV and CMV. In field experiments there was an association between aphid numbers and the spread of CMV and BBWV. Field resistance to infection did not differ in the five delphinium types studied.
AMV was disseminated by infected cuttings and CMV and AMV were recovered from overwintered delphinium rootstocks. The viruses were not isolated from seedlings of commercially available seed or from those raised from CMV-infected plants.
CMV, CLRV and PVX were sap-transmitted to delphinium but AMV and BBWV were not.
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