The Use of Differential Hosts
Vegetable seed companies strive towards developing varieties with resistance to various diseases. As these new varieties are cultivated commercially, with time the associated plant pathogens evolve too. Pathogenic variation known as races within a species is not uncommon. To identify and distinguish different species of a pathogen and/or races within a species plant pathologists use 'differential hosts'.
Differential hosts are sets of plant cultivars used to define races of plant pathogens based on known susceptible and resistant reactions.
ISF has gathered information on host differentials from peer-reviewed scientific publications to help seed companies and researchers identify selected pathogen races and strains. With the exception of those indicated, ISF is unable to provide seed of the differential hosts.
ISF accepts no liability for the use of the information provided in the documents below.
Differential Hosts
Anthracnose (Cl) of bean
Common mosaic and common mosaic necrosis virus (BCMV, BCMNV) of bean
Fusarium wilt (Fop) of bean
Halo blight (Psp) of bean
Fusarium yellows (Foc) of cabbage
Anthracnose (Co) of cucumber
Fusarium wilt (Foc) of cucumber
Downy mildew (Bl) of lettuce
Fusarium wilt (Fol) of lettuce
Fusarium wilt (Fom) of melon
Near wilt (Fop) of pea
Bacterial spot (Xv) of pepper
Potyviruses (PepMoV, PVY, TEV) of pepper
Downy mildew (Pfs) of spinach
Fusarium wilt (Fol) of tomato
Leaf mould (Ff) of tomato
Tobamovirus (ToMV) of tomato
Anthracnose (Co) of watermelon
Fusarium wilt (Fon) of watermelon