CARNATION RUST AND ITS CONTROL BY SYSTEMIC FUNGICIDES

Urediniospores of carnation rust remained viable for up to six months depending on the conditions of storage. Carnation plants became infected when urediniospores were kept in free water on the leaf for 24 h and uredinia appeared about two weeks after inoculation. Sprays of the fungicides benodanil, oxycarboxin, pyracarbolid or triadimefon did not eradicate established infection but root drenches of benodanil or oxycarboxin decreased rust symptoms when applied before or after inoculation of potted plants. Oxycarboxin, applied as a drench to carnation plants growing under commercial conditions, effectively halted the progress of rust infection whereas the disease became severe in plants which did not receive the fungicide. Copyright © 1979, Wiley Blackwell. All rights reserved