• Fn3Pt
  • Arvalis
  • innoplant
  • semae

Symptoms

 

 

Tuber rot often begins at the heel-end, with brown spots on the surface (photo 1); in the flesh, the affected areas are separated from the healthy ones by a blackish border.

 

The flesh tissues become elastic but remain dense, unlike rot symptoms due to bacterial contamination. When the tuber is cut, the flesh turns red on exposure to air, then black within one hour (photo 2).

Last change : 06/26/18
Phytophthora1
Figure 1
Phytophthora2
Figure 2