Articles
GRAFT TRANSMISSION OF CALICO FROM THREE BLACKBERRY CULTIVARS
Article number
112_6
Pages
47 – 52
Language
Abstract
Three calico diseases of blackberry cultivars grown in Oregon were shown to be experimentally graft-transmissible.
Four blackberry hybrids, and one red raspberry cultivar were used as test plants in the grafting tests.
The calico disease of ‘Chehalem’ blackberry gave rise to a different pattern of symptoms in grafted test hosts than the calico diseases of ‘Marion’ and ‘Thornless Logan.’ ‘Marion’ blackberry is a suitable greenhouse indicator host for all 3 of these calico diseases.
However, allowing grafted indicator plants to go through dormancy out-of-doors increased symptom production in many cases.
A heat-treated, shoot-tip-propagated clone of ‘Thornless Logan’ from the Canada Department of Agriculture, designated AC-2, was found to be free of Loganberry calico disease.
Four blackberry hybrids, and one red raspberry cultivar were used as test plants in the grafting tests.
The calico disease of ‘Chehalem’ blackberry gave rise to a different pattern of symptoms in grafted test hosts than the calico diseases of ‘Marion’ and ‘Thornless Logan.’ ‘Marion’ blackberry is a suitable greenhouse indicator host for all 3 of these calico diseases.
However, allowing grafted indicator plants to go through dormancy out-of-doors increased symptom production in many cases.
A heat-treated, shoot-tip-propagated clone of ‘Thornless Logan’ from the Canada Department of Agriculture, designated AC-2, was found to be free of Loganberry calico disease.
Authors
R.H. Converse, K.L. Kowalczyk
Keywords
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