Improved technique for rapid and non-destructive in vitro differentiation between resistant and susceptible banana clones of Fusarium oxysporum f. sp. cubense.

Culture filtrates of Fusarium oxysporum f. sp. cubense were applied to field-grown banana leaves of susceptible and resistant clones. The difference in leaf lesions, measured after 48 h, varied from 13 to 51 mm2 depending on the composition of the growth medium.