Japanese Painted Fern
Symptom Cause  
Leaves wrinkled or curled; discolored, stunted, tend to die
Aphids
>
Rotten spots on fronds; odor present
Bacterial Soft Rot
>
Young ferns rot at base and collapse
Damping-Off
>
Smooth holes in fronds
Japanese Beetles
>
Gray spots on leaves
Leaf Blight (fungus)
>
Reddish brown or blackish spots on fronds
Nematodes
>
Failure to thrive
Overcrowding
>
Deformed fronds
Overfeeding
>
Fronds yellowed; small bumps on fronds
Scale
>
Ragged holes in fern fronds
Slugs and Snails
>
Fronds flecked; whitened; then wilt and turn brown
Thrips
>
Root damage/ holes in fronds/plants wilted
Weevils
>