Calcium Deficiency in Rubber India — Symptoms, Causes & Correction

Blossom end rot, tip burn, fruit cracking, poor cell wall. Young tissue affected first.

Inconsistent irrigation, excess N+K, high humidity, root damage.

Kerala, Karnataka, Tamil Nadu
Laterite, pH 4.5–6

Correction Products & Doses

Product	Method	Rate	Best For
Calcium Nitrate	Drip	2–3 kg/acre/week	Primary N source for drip crops
Calcium EDTA chelated	Foliar	2–3g/L weekly	Fast correction, prevent BER
Calcium Chloride 77%	Foliar	3–5g/L post-harvest	Apple bitter pit, storage quality

Confirm deficiency — Soil test + leaf analysis. Check soil pH (most deficiencies are pH-related).
Immediate foliar spray — Apply Calcium Nitrate at 2–3 kg for fast correction. Repeat after 7–10 days.
Drip correction — Apply via fertigation for lasting effect.
Prevent recurrence — Include in regular nutrition program. Test soil pH and adjust if needed.

Direct from CIB-registered manufacturer. Share your soil test and we recommend exact dose for your farm.