RRII 429

RRII 429 is a high-yielding clone in the RRII 400 series, a newer option that has shown good vigour and yield in traditional-belt trials and is used for replanting in Kerala. Its overall management follows the standard traditional-belt package.

Plant typeBudded clone
MaturityPerennial — 6–7 years to first tapping, then tapped for ~25–30 years
Yield potentialHigh, with good vigour in traditional-belt trials
Disease resistanceGood general disease tolerance
SoilDeep, well-drained laterite / lateritic loam, acidic pH 4.5–6.0
SeasonAll seasons

• Sowing timeField-plant with the first steady monsoon rains, roughly June–July
• Seed rateNot a seed crop — about 445 budded plants per hectare at 4.9 × 4.9 m spacing
• Spacing4.9 × 4.9 m (about 445 trees/ha)
• Sowing methodPlant into pre-dug, refilled 75 cm pits on a contour layout, with a leguminous cover crop between the rows
• IrrigationRainfed in the traditional belt; immature-phase irrigation only in dry non-traditional tracts
• FertilizerGraduated immature NPK-Mg mixtures in split rounds; a mature-rubber mixture once or twice a year after opening
• HarvestingOpened at year 6–7 on girth; then alternate-day tapping, refoliation rest and monsoon rain-guarding

Actual yield depends on sowing time, soil, irrigation, weather, seed quality and crop management.

• Kerala
• Tamil Nadu

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  The Rubber Research Institute of India's most planted clone for decades and long the industry benchmark — very high yield, but slow to tap and needs a full disease-management programme.

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• RRII 414

  An RRII 400-series clone (RRII 105 × RRIC 100) released to improve on RRII 105 — earlier tapping, faster immature growth, higher early yield and better Corynespora tolerance.

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• RRII 417

  An RRII 400-series clone from the same RRII 105 × RRIC 100 cross as RRII 414, combining vigorous growth and high yield with a good general disease profile.

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• RRII 430

  An RRII 400-series clone valued for high yield with a relatively wind-firm, well-branched crown; recommended where wind damage has been a problem for RRII 105.

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• RRII 208

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• GT 1

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• PB 260

  A Malaysian Prang Besar clone (PB 5/51 × PB 49) grown internationally for early, high yield and quick immature growth; used in India in both traditional and non-traditional areas.

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• PB 217

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• RRIM 600

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