Calluna - fungal damage

Calluna - fungal damage
Calluna - fungal damage

Phytophophera damage (fungus) effecting Calluna vulgaris. Most likely in warm moist summers. The effect is exacerbated by nitrogen inputs (NHx, NOy) – but worst with NH3.  

Photographed along NH3 release trasect at Whim Bog, Midlothian, UK.