Abstract
Vascular wilt of carnation in New Zealand is commonly caused by Fusarium oxysporum var. dianthi (Prill, and Del.) Snyder and Hansen. Sometimes Verticillium dahliae Kleb. is responsible. Verticillium cinerescens Wollenw., a fungus of great importance in Europe, has been found on one property, in Christchurch, where it was introduced with cuttings imported from England in 1958. The bacterial wilt organism, Pseudomonas carophylli (Burkholder 1942) Starr and Burkholder 1942 was not found. Fusarium culmorum (W. G. Sm.) Sacc. does not produce a vascular wilt, but is important in plantings as the commonest causc of dieback and branch rot; it also causes a basal rot of young plants.

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