Ecology and Control of Gladiolus Fusarium Wilt

Abstract

Fusarium wilt caused by Fusarium oxysporum f. sp. gladioli is a serious problem to gladiolus production in Taiwan. No control measure has been ever practical to this disease previously. The pathogen was usually associated with planting materials, and was commonly isolated from root, corm, husks of diseased and apparently healthy gladiolus. About 10 times more of the fungus was obtained from macerated diseased corms than from apparently healthy ones. 由Fusarium oxysporum f. sp. gladioli引起之萎凋病為本省唐菖蒲生產最大的難題。病菌經常汙染種植材料，可由病株或外觀健全植株之種皮、球莖和根部分離到病菌。不過病菌在病株球莖之含量常比外觀健全者高出10倍以上。 根由球莖長出後即可分離到病菌，病菌在土壤內主要分佈在表土至深20公分處，到30公分深乃能分離到，球莖種植在不同深度的土壤影響其發芽與發病度。