Phytophthora rot appears in the orchard and in store and symptoms are similar. Symptoms vary according to the variety. The rot is usually firm and the skin easily peeled away.
- Cox – A firm rot ranging in colour from pale green to mid-brown often with a marbled appearance.
- Bramley, Gala, Jonagold and Egremont Russet – Phytophthora rot usually appears as a firm, dark brown rot. Very occasionally, rots may be pale green. On Bramley the rotting is often blotchy.
- Cox and Gala – The rot may also appear as a small brown/grey firm cheek rot, which, if the fruit is cut, is associated with extensive internal rotting. Such symptoms are usually found in fruit which have been treated post-harvest.
- A vinegary aroma is often associated with Phytophthora rot.
- The rot spreads in store by contact and so nests of rot may be present in late stored fruit.