Symptoms of MLN develop distinctly from existing foliar diseases

Mottling and dead heart symptoms (top down) are distinct from most foliar, fungal diseases

Plot level whole plant scoring scale

1 3 5

1 2 3

4 51 = no MLN symptoms 2 = fine chlorotic streaks

on lower leaves3 = chlorotic mottling

throughout plant4 = excessive chlorotic

mottling and dead heart

5 = complete plant necrosis