Apply Diazinon or Malathion when damage or insects are noticed. Pale spots appear on the uppersides and rusty blister-like spots on the undersides of the leaves. Apply Garden Sulphur or Rose Dust at weekly intervals during wet and humid periods. First yellow, then brown and black spots increase in size on the leaves. Lower leaves are affected first.
Leaves wither and die but remain hanging on the plant.
Pick off and destroy infected leaves. Avoid splashing water and soil onto plants. The use of Folpet , Garden Sulphur or Rose Dust at weekly intervals during wet and humid periods may help control this. Tan, irregular and winding tunnels can be seen on the leaves. Pick off and destroy infected leaves.