Agarwood resin can be targeted for different end uses: incense (solid chips) or oil extraction. Each requires different induction and harvest strategies to maximize yield, quality, and aroma profile.
1. Incense-Grade Resin (Solid Chips)
- Objective: Produce resin-rich wood suitable for burning, usually for traditional incense markets
- Characteristics:
- Dark, thick resin zones
- Dense, aromatic wood
- Slightly lower oil concentration than extraction-grade resin
- Induction Strategies:MethodNotesMechanical woundingDeep holes, nailing, bark removal to stimulate resin streaksModerate microbial inoculationEnhances aroma without over-stressing treeHybrid chemical elicitorsOptional, mild doses to avoid over-polymerization
- Harvest Timing:
- Typically 12+ months after induction
- Focus on resin color, density, and streak continuity
2. Oil-Grade Resin (Essential Oil Extraction)
- Objective: Produce high-oil-content resin for distillation or luxury oil markets
- Characteristics:
- Very dense, dark resin
- High sesquiterpene & chromone concentration
- Strong, complex aroma
- Induction Strategies:MethodNotesHybrid inductionMechanical + microbial + chemical for deeper penetrationConsortium inoculantsPromote uniform biofilm-assisted resin zonesModerate to high chemical elicitorsEnhance secondary metabolite (oil) accumulation
- Harvest Timing:
- Monitor resin maturity indicators: color, density, aroma, oil content
- Secondary induction cycles may be used to increase oil yield
3. Key Differences
| Feature | Incense-Grade | Oil-Grade |
|---|---|---|
| Resin Density | Moderate to high | High |
| Aroma Complexity | Moderate | Very complex, layered |
| Oil Content | 5–10% | ≥10% |
| Induction Intensity | Moderate | Higher, hybrid methods recommended |
| Harvest Window | 12 months | 12–18 months, depending on maturity |
4. Farmer Tips
✔ Decide the market target before induction → plan stress type, depth, and wound density accordingly
✔ Use 3‑, 6‑, 12-month benchmarks for monitoring resin
✔ Secondary induction cycles are more useful for oil-grade production
✔ Track color, density, smell, and oil content to determine harvest timing
✔ Record all tree data, induction methods, and harvest outcomes for future cycles
Farmer Key Message
“Incense-grade = moderate resin, ready for burning.
Oil-grade = dense, aromatic resin, rich in essential oils.
Choose your induction and harvest strategy based on the final product goal.”