Abstract
Verticillium dahliae, the cause of blackheart of apricots, is a common soilborne pathogen in South Australia. Eight Prunus armeniaca selections from both the Central Asian and European Groups, including ‘Zailisky Altai’, a selection classified as resistant to V. dahliae, were tested for resistance to this pathogen. Other apricot-related selections viz. P. sibirica, P. ansu and P. mandschurica and three plum rootstock cultivars P. cerasifera cv. ‘Victorian MyrobaIan’ and cv. ‘Myrobalan 29’ and P, cerasifera × P. munsoniana (?) cv. ‘Marianna 2624’ were also tested. Openpollinated F2 seedlings of the apricot and apricot-related selections and rooted cuttings of the plum cultivars were root-wounded, dipped in a spore suspension of V, dahliae (ranging from 1 × 105 to 1 × 108 micro-conidia per ml), potted for 14–20 weeks and assessed for presence of the pathogen in stem vascular tissue. All apricot and related selections were susceptible whereas all the plum cultivars tested were resistant. This demonstrates the potential of plum as a rootstock for apricots in sites where V, dahliae is present.
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Gathercole, F.J., Wachtel, M.F., Magarey, P.A. et al. Resistance of potted apricot and plum rootstocks to Verticillium dahliae (Kleb.). Australasian Plant Pathology 16, 88–91 (1987). https://doi.org/10.1071/APP9870088
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DOI: https://doi.org/10.1071/APP9870088