The black tree disease also known as black root Is a virus which is spreading through the sprouts and plans 
The sprouts where the first one to encounter the plants were later on infected 
The sprouts are glowing small white particles floating around the air
Sprouts
A infected plant leaf would look like with black around the leaf
The cause of the virus is unknown most ponies think it was twilight who caused the virus to spread but yet she is not guilty
Why does it called the black tree disease
