Apple varieties differ in susceptibility to scab. Resistance to V. inaequalis is based mainly on Vf gene (major gene resistance). Varieties with polygenic resistance also are grown commercially.
- Most of the main culinary and dessert varieties grown in UK are susceptible to scab.
- Gala is very susceptible, Cox, Bramley, Jonagold, moderately susceptible; Discovery and Grenadier have a high degree of resistance (polygenic resistance).
- There are many varieties now available resistant to apple scab, based on Vf resistance, e.g. Saturn, Ecolette, Ahra, Topaz but few of these are commercially acceptable alternatives in the UK to the currently grown susceptible varieties.