Does anyone know whats wrong with my draceana? All the new leaves have those "pale green" areas, they have it already in the beginning. I´m familiar with the common pests and they are not the cause. All the old leaves seems healthy. The plants get plenty of indirect sunlight, and I water it only when the soil is dryed. I have seen the same symptoms in other tall "Rikki"s, I have met in my work as a plant carer, but no-one know the cause for this or could it be treated.
I looked into this a little more and the only explanation for mottled leaves i could find is a virus that is apparently not curable. See link below. See if the symptoms match what you are seeing.
The only other common thread I could find in descriptions of diseases/conditions for this species is lack of air circulation.