Fig. 1. Oat seedling affected with 

 grey speck. Note the grey areas 

 and the characteristic line of 

 weakness in affected leaves. 



Fig. 2. Oat leaf exhibiting the 

 characteristic symptoms of grey 

 speck. 



Fig. 3. Sugar beet suffering from manganese deficiency. Note the speckling of 

 the leaves, appearing in the photograph as a mottling. 



