Dothistroma NEEDLE Blight - In recent years, Scots pine has been badly affected by DOTHISTROMA NEEDLE BLIGHT disease.  This can form needle discolouration and a significant slowing of growth, almost to the point of stand-still.

Diagnosis of DNB can be tricky as many other factors can cause temporary or permanent discolouration, so Forest Research has produced this useful field guide to help with identification and it also gives details on where to send samples for diagnosis.