Susceptibility of Elite Acacia mearnsii Families to Ceratocystis Wilt in South Africa

概要

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Ceratocystis albofundus is a recently described pathogen infecting Acacia mearnsii in South Africa, and it causes a disease known as Ceratocystis wilt. Symptoms of the disease include die-buck, gummosis and wilting of infected trees. In order to select trees tolerant to this fungus, susceptibility tests were conducted on trees representing fourteen families of A. mearnsii. A virulent isolate of C. albofundus was selected and inoculated into the stems of twelve-month-old plants in a plantation. Lesion lengths, in the bark, and disease development were assessed after 6 weeks. All fourteen families of A. mearnsii were susceptible to infection by C. albofundus. Considerable variation was, however, noticed between individual trees within the same family and the incorporation of disease tolerant trees into breeding programmes is proposed.
日本森林学会の論文
1999-05-16