Sugarcane common rust (Puccinia melanocephala)
Initial symptoms of sugarcane common rust are elongate yellowish leaf spots, 1-4 mm long. On susceptible plants, the spots increase in size and reddish-brown in colour. Typical rust pustules form on the leaves. The elongate pustules are parallel to the venation of the leaf and measure 2-20 mm by 1-4 mm. Multiple pustules on leaves give a reddish appearance to plants from a distance.
- Control of sugarcane rust relies on planting resistant cultivars. Fungicides are neither practical nor economical for rust control.