Monitoring Example at RAMU
Sampling (200 stalks per field)
Examination (Critical level: 8 pupae/200 stalks or 20% stalk damage)
- Monitoring at 3-4 weeks interval
- 2-7 months aged cane plants
Sampling (200 stalks per field)
- First 60-100 meters from headlands
- 20 cane rows selected at random
- One stalk sampled every 20 steps starting at 5 meters from the headland
Examination (Critical level: 8 pupae/200 stalks or 20% stalk damage)
- Examination of leaf sheaths for egg masses
- Longitudinal slicing of stalks to view boring within
- Number of larvae and pupae inside the split stalk is counted