ISHS Acta Horticulturae 701: XII International Symposium on Apricot Culture and Decline
BACTERIAL CANKER OF STONE FRUIT TREES: APRICOT SUSCEPTIBILITY AND WINTER ROOT RESPIRATION |
| Authors: | A. Vigouroux, C. Bussi, T. Girard |
| Keywords: | Pseudomonas syringae, Prunus, apricot, soil texture, soil oxygen, water content |
| Abstract:
Damages by bacterial canker of stone fruits are especially heavy in orchards in coarse-textured soils. It has been previously pointed out that in such soils winter tree hydration is higher than in finer ones. Moreover, higher tree hydration has been shown to favour bacterial infection. As an important coarse soil feature is a high aeration, which greatly influences water uptake, this aspect was studied. Apricots were grown in large containers with a soil substrate in which aeration was experimentally increased or not. After two years of culture, water content and susceptibility of the trees were significantly increased when soil was more aerated. Winter root respiration could be a dramatic factor of tree susceptibility to bacterial canker, probably through water uptake modulation. | |
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