Fruit rot (koleroga)
Young nuts turn water-soaked, rot and drop in heavy monsoon rain, often with white fungal growth. A garden can lose a large share of its crop in a few wet weeks if protective sprays are late.
Arecanut advisory and crop management in Karnataka
An arecanut garden is a decades-long investment. Most yearly losses come in the monsoon, and most of them can be prevented.
Arecanutಅಡಿಕೆसुपारी
Crop calendar
The working year in an established arecanut garden. Harvest timing varies by region and by whether nuts are sold tender or ripe.
At a glance
- Planting season
- June to July with the monsoon, or September to October in very high rainfall areas
- Crop duration
- Begins bearing in 5 to 7 years and stays productive for decades
- Main districts in Karnataka
- Dakshina Kannada, Udupi, Shivamogga, Davanagere, Chitradurga, Tumakuru, Chikkamagaluru, Uttara Kannada
- Typical spacing
- 2.7 × 2.7 m (9 × 9 feet) is the most common layout
What commonly goes wrong
Yellow leaf disease
Leaves yellow from the tips of the outer whorl, nuts become fewer and smaller, and the palm declines over years. Common in parts of the Malnad, and managed rather than cured.
Foot rot (Ganoderma)
Palms yellow and droop, the stem base rots and bracket fungus appears near the base. Infected palms are a source of spread to their neighbours.
Root grubs and poor nutrition
White grubs feed on roots and palms weaken. Boron and potassium shortage show up as nut splitting and poor bunches.
How advisory helps
- A spray calendar for fruit rot set to your rainfall, so the first protection goes on before the monsoon, not after
- Drainage, mulching and shade planning for the wet months
- Post-monsoon fertilizer and liming from your soil test
- Dry-season irrigation scheduling for your water source
- Same-day photo diagnosis of yellowing, nut drop or stem problems
Arecanut advisory
₹10,000
₹10,000 for the first acre, ₹5,000 for each additional acre.
Start Arecanut advisoryTests that matter for Arecanut
- Soil test, all parameters
Much arecanut soil is acidic. The test sets lime, potassium and boron for the year.
₹2,000
- Leaf sampling
Shows what the palms are actually taking up when yellowing appears despite good fertilization.
₹500
- Water sampling
Checks borewell water used for dry-season irrigation.
₹250
Questions about Arecanut
The first protective spray should go on just before the monsoon sets in, usually late May or early June, with follow-up sprays at intervals through the wettest weeks. Exact timing depends on your area's rainfall.
There is no cure, but good nutrition, drainage and care slow the decline and keep affected palms productive for longer. We can help you plan that.
Usually in two splits a year, the main one after the monsoon and a smaller one before it, with lime as the soil test indicates.
Yes. The first five years decide how well a garden bears for decades. We help with spacing, shade, intercrops, irrigation and early nutrition.
Growing arecanut in Karnataka
Karnataka grows more arecanut than any other state. Gardens stretch from the coast of Dakshina Kannada and Udupi through Shivamogga and Chikkamagaluru in the Malnad to Davanagere, Chitradurga and Tumakuru on the plains, where the crop has expanded rapidly under irrigation. A well-managed garden produces for decades, so decisions made in one year affect the next twenty.
The year in an arecanut garden
Before the monsoon
April and May are the time to prepare. Basins are cleaned and mulched, drainage channels are opened, and the first protective spray against fruit rot goes on just before the monsoon arrives. In gardens on the plains, irrigation continues until the rains are reliable.
Through the monsoon
June to September is when most losses happen. Fruit rot, known locally as koleroga, spreads fast in continuous rain and can strip a large share of the developing nuts. Follow-up sprays at the right interval, good drainage and covering bunches where practical keep it in check. This is also when foot rot and root problems advance in waterlogged soil.
After the monsoon
October and November are for feeding. The main dose of fertilizer, organic manure and lime is applied once the heavy rain has passed, guided by a soil test. Green manure such as Mucuna grown between rows during the rains is cut back and returned to the soil.
Harvest and the dry season
Ripe nuts are harvested from late in the year, with timing varying between regions and between tender and ripe nut markets. From February, irrigation becomes the main task. Arecanut is sensitive to moisture stress, and a garden that goes short of water in the hot months yields less the following season.
Problems to watch
Yellow leaf disease is the most serious long-term problem in parts of the Malnad. There is no cure, but palms that are well fed, well drained and not stressed decline far more slowly. Foot rot caused by Ganoderma kills palms and spreads to neighbours, so infected palms need to be handled carefully. Root grubs weaken palms from below. Nut splitting and poor bunches often trace back to boron and potassium shortage, which a soil and leaf test will show.
How Horti Guru supports arecanut growers
Season-long advisory for arecanut runs for twelve months. We build a year plan around your rainfall and soil: when to spray, what to apply after the rains, how much to irrigate in the dry months, and what to watch for. When nuts start dropping or leaves yellow, a photograph on WhatsApp gets you a specific answer the same day. Many growers also grow pepper on their arecanut palms; advisory covers both.
Not ready for a full season? Start with one call.
Talk to an expert, ₹250