BIOLOGICAL CONTROL OF FUSARIUM IN GLADIOLUS WITH NON-PATHOGENIC FUSARIUM ISOLATES
Pretreatment of gladiolus corms with spores of a non-pathogenic Fusarium isolate before corms were planted in soil infested with Fusarium oxysporum f.sp. gladioli reduced disease severity. Corms were dipped in a spore suspension of a non-pathogenic Fusarium isolate and incubated under moist conditions at 20°C before they were planted in infested soil. An incubation period of 2 days gave the largest differences between pretreated corms and control corms dipped in water. Pretreatment of corms with heat-killed spores or culture filtrates of pathogenic or non-pathogenic isolates had no protective effect. Disinfection of pretreated corms in 2% formaldehyde after the incubation period and before planting neutralized the effect of the pretreatment.
Reduction of disease could be obtained with different non-pathogenic isolates of F. oxysporum or F. proliferatum.
Roebroeck, E.J.A. and Mes, J.J. (1992). BIOLOGICAL CONTROL OF FUSARIUM IN GLADIOLUS WITH NON-PATHOGENIC FUSARIUM ISOLATES. Acta Hortic. 325, 769-780