Species Variety of Fusarious Rotting Agent of Leek

Plant Protection Institute, BG-2230 Kostinbrod, Bulgaria


KOLEVA, K, 2003. Species variety of fusarious rotting agent of leek. Bulg. J. Agric. Sci., 9: 621–624

Species of Genus Fusarium have been isolated and identified as fusariuos rotting agents on leek for the first time in Bulgaria. Depending on the period of the disease occurrence species Fusarium have been divided in two groups. In the first group are species causing rotting during vegetation – F. oxysporum Schlecht, F. moniliforme Scheldon, F. equiseti (Corda) Sacc. In the second group is F. culmorum (W.G. Smith) Sacc., which causes rotting on leek during its preservation. The isolated and identified species Fusarium are pathogenic when leek and onion are infected artificially, and they are less pathogenic for tomatoes. Potatoes and carrots can be infected only by F. culmorum.

Key words: leek, rotting, isolate, mycelium, identification, Fusarium