Reddish-brown lines appear on the upper sides of the leaves and rusty brown spots on the undersides, especially along the main veins. Leaves may be deformed. Misting will help dislodge many insects. Click on insects above for more information and controls. Leaves are curled.
Softbodied insects cluster around young stems and leaves.
Apply Bulb Dust or Rose Dust . Destroy badly infested leaves. Improve air circulation. Spray with Benomyl Small blisters show up on the leaves. These blisters enlarge and run together.