Suppression of Fusarium Wilt of Carnation in a Composted Pine Bark and a Composted Olive Pumice. J. Pera, Departament de Patologia Vegetal, Institut de Recerca i Tecnologia Agroalimentāries, Centre d’Investigaciķ Agrāria de Cabrils, 08348 Cabrils, Spain. C. Calvet, Departament de Patologia Vegetal, Institut de Recerca i Tecnologia Agroalimentāries, Centre d’Investigaciķ Agrāria de Cabrils, 08348 Cabrils, Spain. Plant Dis. 73:699-700. Accepted for publication 6 March 1989. Copyright 1989 The American Phytopathological Society. DOI: 10.1094/PD-73-0699.

The use of a composted olive pumice or a commercial composted pine bark instead of sphagnum peat in container media delayed the appearance of wilt caused by Fusarium oxysporum f. sp. dianthi in cultivar Lena carnations. After 5 mo, wilt incidence in media with composted olive pumice and composted pine bark with an initial inoculum density of 10⁴ cfu/cm³ was 20 and 40%, respectively, whereas in a similarly infested medium with sphagnum peat as the organic component, wilt incidence was 99%.