Qualification Level: TESDA NC I – Sustainable Resin Induction
Crop Focus: Agarwood (Aquilaria spp.)
Objective: Understand the different methods to inoculate Agarwood trees for controlled resin formation
I. INTRODUCTION
Inoculation is the controlled introduction of fungi or other microbial elicitors into the tree to stimulate resin production.
The method chosen affects resin quality, quantity, and tree health.
Key Principle: Inoculation should be sustainable, minimally stressful, and compatible with biofertilizer and irrigation practices.
II. TYPES OF INOCULATION SYSTEMS
1. Physical / Mechanical Wounding + Inoculation
Method:
- Drill small holes or make shallow cuts on the trunk or branches
- Insert inoculant (fungal culture, BarIno FusaTrinity™, agar plugs, or liquid suspension)
- Seal with wax or biodegradable plugs to prevent contamination
Pros:
- Direct delivery to heartwood
- High resin induction rate
Cons:
- Can stress the tree if overdone
- Requires skill to avoid tree death
2. Syringe / Liquid Injection System
Method:
- Use a syringe or injection tool to introduce liquid fungal inoculant into drilled holes
- Often combined with fertigation or irrigation water for microbial establishment
Pros:
- Precise dosage
- Minimal mechanical damage
- Reduces risk of external contamination
Cons:
- Limited area of effect per injection
- Requires careful timing for tree age and condition
3. Paste / Mud Inoculation
Method:
- Mix fungal inoculant with clay, mud, or organic carrier
- Apply to wounds or shallow cuts on the trunk
- Often covered with natural sealant (mud plug or wax)
Pros:
- Easy for small-scale or low-tech operations
- Can carry multiple beneficial microbes together
Cons:
- Less uniform distribution
- Needs monitoring to prevent washout during rainfall
4. Frill / Canker Method
Method:
- Make spiral cuts or shallow slits along the trunk (frill)
- Introduce fungal inoculant into the exposed wood
- Seal with wax or biodegradable plug
Pros:
- Large area for resin formation
- Commonly used for commercial resin induction
Cons:
- Requires careful technique
- More stressful than small-hole methods
5. Agar Plug / Wood Chip Method
Method:
- Place fungus-grown agar plug or colonized wood chip into drilled holes
- Seal hole to prevent contamination
- Fungi colonize heartwood over weeks/months
Pros:
- Fungal colonization is direct and controlled
- High-quality resin formation
Cons:
- Labor-intensive
- Limited to trained personnel
III. SELECTION CRITERIA FOR INOCULATION SYSTEM
| Factor | Consideration |
|---|---|
| Tree age & size | Seedlings: avoid heavy methods; Mature trees: can withstand frill or multiple injections |
| Desired resin quality | Agar plug and controlled fungal injection → high-quality resin |
| Labor & resources | Syringe injection for precision; paste method for low-tech farms |
| Environmental conditions | Avoid wet season for paste inoculation; ensure dry period for sealant adherence |
| Integration with biofertilizers | Ensure soil microbial health is maintained for optimal resin induction |
IV. BEST PRACTICES
- Always use healthy, well-nourished trees
- Apply biofertilizers (Mycoboost, Biogrow) to support microbial activity before and after inoculation
- Avoid excessive wounding to prevent tree death
- Monitor soil moisture; maintain moderate irrigation
- Record inoculation date, method, tree ID, and fungal strain for traceability
V. TESDA NC I PERFORMANCE STANDARD
Learner must demonstrate ability to:
- Identify types of inoculation systems
- Select appropriate method based on tree age and plantation condition
- Apply inoculants safely and effectively
- Monitor tree response post-inoculation
VI. FARMER-FRIENDLY CHECKLIST
☐ Tree health assessed before inoculation
☐ Correct inoculation method chosen (hole, syringe, paste, frill, agar plug)
☐ Fungal inoculant prepared per SOP
☐ Sealant applied to prevent contamination
☐ Soil moisture and biofertilizers managed before and after inoculation
☐ Record-keeping updated (tree ID, method, date, fungal strain)
Key Takeaway: Choosing the right inoculation system ensures effective, controlled resin induction, minimizes stress on trees, and integrates with sustainable farming practices like biofertilizer use and irrigation management.