Fortius

Tomato

Fortius is a rootstock with mid-strong vigor and is well suited for short and mid cycle production where growers face challenges with bacterial wilt. It is generative and is additionally well suited for areas where Fusarium wilt race 3, Fusarium crown and root rot, Corky root or Root knot nematode are a problem. Fortius has an intermediate resistance to certain strains of bacterial canker, however, this needs to be tested by the grower at their facilities to confirm performance against local strains.

  • Strong seedling development
  • Uniform emergence making grafting more efficient
  • Unique intermediate resistances to help customers who have specific disease pressures

Disease Key

CODE DISEASE PATHOGEN
Aal Alternaria stem canker Alternaria alternata f. sp. lycopersici
Fol Fusarium wilt Fusarium oxysporum f. sp. lycopersici
For Fusarium crown & root rot Fusarium oxysporum f. sp. radicis-lycopersici
Lt Powdery mildew Leveillula taurica
Mi Root knot nematode Meloidogyne incognita
Mj Root knot Meloidogyne javanica
On Powdery Mildew Oidium neolycopersici
Pf (Ff) Leaf mold Passalora fulva (Fulvia fulva)
Pi Late Blight Phytophthora infestans
Pl Corky root Pyrenochaeta lycopersici
Pst Bacterial speck Pseudomonas syringae pv. tomato
Rs Bacterial Wilt Ralstonia solanearum
Sbl Gray leaf spot Stemphylium botryosum f. sp. lycopersici
Sl Gray leaf spot Stemphylium lycopersici
Ss Gray leaf spot Stemphylium solani
ToANV Tomato apex necrosis Tomato apex necrosis virus
ToBRFV Brown rugose Tomato brown rugose fruit virus
ToMV Tomato mosaic Tomato mosaic tobamovirus
TSWV Tomato spotted wilt Tomato spotted wilt tospovirus
TYLCV: Is Tomato yellow leaf curl Tomato yellow leaf curl bigeminivirus (Israel strain)
Va Verticillium wilt Verticillium albo-atrum
Vd Verticillium wilt Verticillium dahliae

Resistance Terminology

HR = High resistance: plant varieties that highly restrict the growth and development of the specified pest or pathogen under normal pest or pathogen pressure when compared to susceptible varieties. These plant varieties may, however, exhibit some symptoms or damage under heavy pathogen or pest pressure.

IR = Intermediate resistance: plant varieties that restrict the growth and development of the specified pest or pathogen, but may exhibit a greater range of symptoms or damage compared to “highly resistant” varieties. Intermediately resistant plant varieties will still show less severe symptoms or damage than susceptible plant varieties when grown under similar environmental conditions and/or pathogen or pest pressure.

T = Tolerance: The ability of a plant variety to endure abiotic stress without serious consequences for growth, appearance and yield.