Correct option is C
✅ (c) Sugarcane top borer (
Scirpophaga excerptalis): • Larvae bore into the central whorl, causing dead heart in early stages and bunchy top in later stages. • Leaves become narrow, erect, and the growth of the central shoot is arrested. • One of the major pests of sugarcane.
❌ (a), (b): • Affect different parts of the cane but don’t cause bunchy top.
❌ (d) Wooly aphid: • Affects leaves and reduces photosynthesis, not responsible for bunchy top.