What is Spongy Tissue in Alphonso Mangoes?

Spongy tissue in Alphonso mangoes is a dry, white, corky patch inside the pulp caused by convective heat stress during the March–June season. It is 100% safe to eat. Near-infrared (NIR) scanning at a partner farm in the Ratnagiri-Devgad belt helps remove many affected fruit before packing, but no scanner catches every one. Simply scoop out the white area and enjoy the rest.

Buy Alphonso Mangoes Online

Both varieties below are GI Tagged, FSSAI-certified, and graded with near-infrared (NIR) scanning at a partner farm in the Ratnagiri-Devgad belt before packing. Season runs February to June (peak March to May). Orders placed before 10 AM ship same day via BlueDart air freight.

Commercial Comparison: Ratnagiri vs Devgad Alphonso

Feature	Ratnagiri Alphonso	Devgad Alphonso
GI Number	GI No. 139	GI No. 139
Brix (sweetness)	18 to 24°	23–27°
Season Window	Mid-March – end May	Late March – mid-June
Flavour Profile	Bold, rich, saffron-floral	Sweet, aromatic, honey notes
Fruit Weight	150–300 g per fruit	180–350 g per fruit
Box Price Range	₹1,849 – ₹5,399	₹1,849 – ₹5,499
Export Certified	Yes — APEDA 225579	Yes — APEDA 225579
Best For	Gifting, eating fresh, Aamras	Export, connoisseurs, gifting

Delivery Across India

Orders placed before 10 AM dispatch same day. BlueDart air freight handles all shipments. Typical transit windows by zone:

• Mumbai, Pune, Nashik: Next day (1 day transit)
• Delhi, Bengaluru, Hyderabad, Chennai: 1–2 days
• Kolkata, Ahmedabad, Surat: 1–2 days
• Northeast, Jammu, Andaman: 2–3 days

Every box ships in a double-corrugated carton with hay-bed cushioning. Mangoes are naturally ripened in hay — zero carbide, zero ethylene chamber. We do not ship July through January; fruit is not available in that window and we will not substitute inferior product.

How to order

1. Step 1: Select Grade — Choose Ratnagiri (₹1,849–₹5,399) or Devgad (₹1,849–₹5,499) based on Brix preference, budget, and occasion.
2. Step 2: Add to Cart — Select box size (6, 12, or 24 fruit) and quantity on the product page.
3. Step 3: Same-day Dispatch — Place order before 10 AM IST; BlueDart picks up same afternoon during season (March–June).

What Is Spongy Tissue in Alphonso Mangoes?

Cut open a perfect-looking Alphonso mango. Most of the time you find deep orange, butter-soft pulp. Occasionally you find a patch — white, dry, corky, slightly hollow. That is spongy tissue.

The scientific name is Spongy Tissue Disorder (STD). It is a physiological disorder, not a fungal infection, not a bacterial disease, not a chemical residue, and not a worm. The mango's own tissue breaks down internally under heat stress. The exterior looks completely normal. Even an experienced grader cannot detect it by sight, smell, or touch.

What Does Spongy Tissue Look Like Inside a Mango?

The affected area sits close to the seed. It appears white to off-white, dry, and slightly stringy. Healthy pulp is deep orange, firm but yielding, and intensely aromatic. The contrast is obvious the moment you cut the fruit. The white patch has almost no flavour — it is not bitter, not sour, simply tasteless and texturally unpleasant.

Is Spongy Tissue Common in Alphonso Mangoes?

Yes — more so than in any other variety. Alphonso is uniquely susceptible because it ripens during April and May, the peak of the Konkan summer. The laterite rock soil in Ratnagiri and Devgad absorbs and radiates heat intensely during those weeks. Other varieties ripen earlier or later, avoiding the worst of the heat window.

Why Does Spongy Tissue Happen?

The Convective Heat Cause

The primary cause is convective heat stress. In April and May, laterite rocks on Konkan farms — including in villages like Malgund and Pawas near Ratnagiri — reach surface temperatures above 60°C. Heat radiates upward from the soil while the sun beats down on the fruit. The mango is caught between two heat sources.

This sustained thermal stress disrupts calcium transport inside the fruit. Calcium is critical to cell wall integrity. When calcium absorption fails, cell walls in the tissue nearest the seed collapse. The cells dehydrate. The result is that dry, white, air-pocketed patch.

The Calcium Deficiency Link

Calcium moves slowly in plants. In extreme heat, the mango tree prioritises root survival over fruit nutrition. Calcium supply to developing fruit drops. Without adequate calcium, the mesocarp tissue (the edible pulp layer) cannot hold its structure. The breakdown is irreversible once it begins. No post-harvest treatment reverses spongy tissue.

Why Is It Invisible from Outside?

The skin and outer pulp layers stay intact. They receive enough calcium and moisture from the tree's vascular system. Only the inner pulp — furthest from the skin and closest to the seed — is deprived. This is why the mango looks, smells, and feels perfect right up to the moment you cut it.

Is Spongy Tissue Safe to Eat?

Yes. Completely safe. There are no toxins, no pathogens, and no harmful compounds in spongy tissue. It is dehydrated mango flesh — the same cells, desiccated.

Do not discard the whole mango. Scoop out the white patch with a spoon or cut it away with a knife. Discard that piece. The orange pulp surrounding it is fully sweet, safe, and nutritious. A mango with minor spongy tissue can still be used for Aamras, smoothies, or fresh eating — simply remove the affected area.

Nutrition in a Healthy Alphonso Mango

The unaffected pulp of an Alphonso mango contains Vitamin C, Vitamin A (as beta-carotene), potassium, folate, and dietary fibre. At 22–27° Brix, Alphonso is among the sweetest mango varieties in the world. One 150 g serving delivers roughly 100 kcal, 24 g of natural sugar, and 2.6 g of fibre.

How NIR Scanning Detects Spongy Tissue in Alphonso Mangoes

Near-Infrared Non-Destructive Testing (NIR-NDT)

Near-Infrared (NIR) scanning is the same non-destructive testing technology used in pharmaceutical and food safety labs. A scanning machine at one of our partner farms in the Ratnagiri-Devgad belt passes the fruit through on a conveyor belt. NIR light penetrates the skin and pulp. A sensor array reads how light is absorbed and reflected at different wavelengths.

Healthy pulp absorbs NIR light in a consistent pattern. Spongy tissue contains air pockets where collapsed cells once sat. Air reflects NIR light differently from dense fruit flesh. The scanner's software compares each reading with the reflection signature of spongy tissue and flags the fruit for rejection.

What NIR Scanning Cannot Catch

Scanning reduces spongy tissue but does not remove it: no scanner detects every affected fruit. Some cases are in a very early stage at the time of scanning — too small for the sensor to distinguish from normal tissue variation. In some of those cases, the defect continues to develop during the 1–3 day transit period due to heat inside the box.

If a spongy mango reaches you, it was not intentional. Contact us. We photograph every batch and track detection rates by orchard block and week. We are actively retraining the model with new season data each year to close that gap. Prashant Powle, who oversees sourcing and quality across our 48 Konkan villages, reviews rejection data weekly during peak season.

How We Reduce Spongy Tissue at Source

Mulching with Dry Grass

Mulching — spreading dry grass or coconut husk over the soil around each tree — insulates the laterite rock surface and reduces ground temperature by up to 8–10°C. We apply mulch across farms in Ratnagiri and Devgad by early March, before peak summer heat arrives. This reduces the convective heat effect at the root zone and improves calcium uptake.

Foliar Calcium Applications

We apply calcium-based foliar sprays directly to the developing fruit during the February–March period. Calcium applied to the fruit surface moves into the mesocarp. This supplements what the tree's vascular system delivers. The timing is critical — calcium sprays after fruit-set are far more effective than soil amendments at that stage.

Harvest Timing and Maturity Index

Harvesting too late increases spongy tissue risk. We use a combination of Brix measurement, skin colour change, and float-sink tests at the packing station. Fruit that sinks in water (higher dry matter, appropriate maturity) is selected. Over-mature fruit is not packed. This discipline reduces disorder incidence before the mango even reaches the scanner.

What We Do Not Do

We do not use calcium carbide for ripening — ever. We do not use ethylene chambers. We do not spray any post-harvest chemical to mask the appearance of spongy tissue. Natural hay-bed ripening in ambient Konkan conditions is the only method we use. This is verifiable under our FSSAI licence 10020022011783 and GI Authorised User certificate AU/5974/GI/139/260.

We also do not ship mangoes outside the March–June season. There is no Alphonso mango from our farms between July and January. Any product marketed as Alphonso in that window is either frozen pulp or a different variety.

For a deeper understanding of how to identify genuine GI-tagged Hapus, read our guide on how to identify real Alphonso mango. For seasonal storage tips that preserve quality after delivery, see our article on how to store Alphonso mangoes at home. Browse the full range in our Alphonso mango collection.

Frequently Asked Questions

Authority

AlphonsoMango.in is operated by Powle Home Foods, a brand of Powle Home Foods We hold GI Authorised User certificate AU/5974/GI/139/260 (GI No. 139, Registry certificate 4163, issued 16 October 2019), FSSAI licence 10020022011783, and APEDA registration 225579. All mangoes are carbide-free, naturally hay-bed ripened. We have served 47,000+ customers since 2019 and export to the US, UK, UAE, Singapore, and Japan. Prashant Powle personally oversees sourcing relationships across 48 villages in Ratnagiri and Devgad, Konkan, Maharashtra.

Source: Powle Home Foods (Powle Home Foods), GI Authorised User AU/5974/GI/139/260, Registry certificate 4163, issued 16 October 2019.

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