If you are looking for a high-yielding, fast-growing, and well-adapted rubber variety, RRIV 124 (Lai Hoa 90/952) is one of the most successful and widely recommended clones developed by the Vietnam Rubber Research Institute (RRIV).
This variety has become a cornerstone for both new planting and replanting programs across Vietnam’s major rubber-growing regions thanks to its balance of vigorous growth, stable latex productivity, and broad adaptability to diverse climates and soils.
1. Overview and Position of RRIV 124 among Hybrid Rubber Clones
Table of Contents
RRIV 124 – also known as Lai Hoa 90/952 – belongs to the high-yield hybrid group created by RRIV.
It is officially listed in the Vietnam Rubber Group (VRG) clone structure for 2022–2026, particularly for Southeast Vietnam and the Central Highlands.
The variety stands out for its excellent growth rate, balanced canopy, and stable latex yield, making it a popular choice among smallholder farmers and state-owned plantations alike.
2. Origin and Breeding History
RRIV 124 was bred at the Vietnam Rubber Research Institute in 1982 from the cross RRIM 600 × PB 5/51.
It underwent multiple phases of rigorous trials (stages II, III, IV) across Vietnam, Laos, and Cambodia.
After nearly two decades of evaluation, RRIV 124 proved its superiority and was officially included in Vietnam’s national clone structure in 2002.
This success illustrates the technological and scientific capacity of RRIV in breeding high-performance rubber clones.
3. Growth Characteristics
RRIV 124 exhibits strong vigor, particularly during the establishment stage.
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Rapid growth rate: The trees reach tapping size within 5–6 years after planting.
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Trunk and canopy: Straight trunk with a symmetrical, moderately dense canopy – ideal for maintenance and harvesting.
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Regenerated bark: Soft and thick, ensuring easy tapping and minimal bark injury.
4. Latex Yield and Quality
RRIV 124 is classified as a high-yielding and stable clone:
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Latex yield: 2.0–2.5 tons/ha/year under normal management; can exceed 2.8 tons/ha/year in intensive systems.
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Response to stimulation: Reacts well to Ethephon when used correctly according to VRG technical standards.
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Latex quality: High and stable Dry Rubber Content (DRC), suitable for industrial processing.
5. Disease Resistance and Environmental Adaptability
Resistance profile
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Moderate to good resistance against powdery mildew and pink disease.
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Sensitive to Corynespora leaf fall, especially in humid regions or prolonged rainy seasons.
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Vulnerable to tapping panel dryness (TPD) if over-stimulated or over-tapped.
Adaptability
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Grows well across basalt, grey, and sandy loam soils.
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Performs strongly in both Southeast Vietnam and Central Highlands, even in areas with distinct dry seasons.
6. Recommended Planting Regions
According to VRG’s clone structure for 2022–2026, RRIV 124 remains a widely grown clone but is no longer prioritized for new expansion due to its large existing area.
Farmers replanting should also consider improved modern clones such as RRIV 209 and RRIV 106 for better yield and disease resistance.
7. Cultivation and Management Guidelines
7.1. Establishment Stage
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Maintain balanced planting density (450–500 trees/ha).
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Ensure proper weed control, soil preparation, and balanced fertilization for uniform growth.
7.2. Tapping Techniques
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Opening criteria: Begin tapping when 60% of trees reach 50 cm trunk circumference (at 1 m height).
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Tapping systems: Common systems include d/2 or d/3 (half spiral, every two or three days).
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Stimulation: Apply Ethephon following Decision 4689/QĐ-BNN-TT (2021) to optimize yield without harming tree health.
7.3. Nutrition Management
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Fertilization: Base on soil test results and tree age. Combine organic and inorganic sources for better soil fertility.
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Organic matter: Use compost, bio-fertilizers, and mulching to sustain long-term productivity.
7.4. Disease Management
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Regular monitoring: Watch for powdery mildew, pink disease, and Corynespora.
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Preventive actions: Prune for good air circulation, keep tapping panels clean, and avoid waterlogging.
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Prompt treatment: Apply approved fungicides as recommended by RRIV experts.
8. Hybrid Rubber Clones – What Does “Lai Hoa” Mean?
“Lai hoa” means cross-pollinated hybrids, combining genetic advantages from two distinct parent clones.
Such hybrids often demonstrate:
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Higher latex yield,
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Improved disease resistance,
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Wider adaptability to soil and climate.
Prominent Vietnamese hybrid clones include:
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RRIV 124 (Lai Hoa 90/952)
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RRIV 106, RRIV 209, RRIV 4, etc.
These are all outcomes of decades of hybridization and selection work at the Vietnam Rubber Research Institute.
9. Certified Seedling Sources and Current Prices (2025)
For authentic RRIV 124 seedlings, buy only from authorized suppliers:
Center for Rubber Variety Research & Development – RRIV
National Highway 13, Lai Khê Hamlet, Bến Cát City, Ho Chi Minh City
02743.565.596 | 0982.450.133 (Mr. Vinh)
Current price (July 2025):
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19,000 – 40,000 VND/tree (1-tier leaf seedlings)
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Price varies by supplier, size, and order volume.
10. Economic Potential
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Stable latex income: Reliable yield ensures steady cash flow for smallholders.
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Long productive life: Can produce latex for over 20 years under proper management.
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High adaptability: Reduces replanting risk in various soil and weather conditions.
11. Conclusion
RRIV 124 (Lai Hoa 90/952) remains one of Vietnam’s most reliable and productive rubber varieties.
It combines strong growth, consistent yield, and wide adaptability, ensuring sustainable economic returns for both large-scale and smallholder plantations.