The author of this article Swapna Ghosh was once a national scholar in Botany and an active PhD researcher at Burdwan University. She has been a full-time gardener for the past 45 years. She loves to apply her plant knowledge in everyday life and grows most of her own veggies, fruits, flowers and even medicinal plants. Her yard and rooftop together host more than 40 varieties of plants and trees.
With heatwave warnings for the ongoing summer in India, sweltering afternoons are already driving up demand for tender coconuts throughout the country.
Did you know? As of March 2026, India is the world’s leading producer of coconuts, contributing roughly 30.37% of global production, with Kerala, Karnataka, Tamil Nadu, Andhra Pradesh, and West Bengal contributing the most.
But common coconut diseases often harm overall production in major growing areas.
The coconut mite is a serious pest that reduces yield. It spreads through the air and can also be carried on tools and equipment used for harvesting.
In this article, we will discuss two of the most common diseases, their symptoms, and simple, economical methods of prevention. These methods have been successfully used on our own trees in the backyard and can be easily adopted by farmers as well as home growers to improve coconut production.
Disease caused by Coconut Mite (Aceria guerreronis)
The coconut mite is a serious pest that reduces yield. It spreads through the air and can also be carried on tools and equipment used for harvesting. These mites can cause extensive damage to coconut production.
The mite first attacks the perianth (the floral parts at the base of the nut). Tender nuts may turn brown, or tender coconuts may develop brown patches. The nuts become deformed, remain small in size, or sometimes fall prematurely.
The pest flourishes in India and other Asian countries during dry months such as March to May. It causes significant economic damage to the coastal states of eastern and western India.
Control method: Neem leaf solution
Preparation (per plant/palm):
Take two to three handfuls of neem leaves. Grind them and mix them with ½ litre (0.5 L) of water.
Application:
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Moisten the soil around the root zone (especially if the soil is dry).
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Pour the neem leaf solution onto the wet root zone.
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From the next day, water the tree daily for seven days.
This organic root-feeding procedure can help improve coconut production significantly. Repeating the same procedure every three months keeps the disease away from our own trees for a very long time.
Disease caused by Rhinoceros Beetle
Sometimes, you may notice that young coconut leaves appear cut, with chewed fibre sticking out at the base of the central spindle. The organism responsible is the rhinoceros beetle.
An acute problem can be fully prevented by simple means, such as using naphthalene balls. At a time, one ball is sufficient per plant.
These beetles attack the top of the tree (the crown), feed on the sap, and destroy the leaves. As we all know, leaves are the “kitchen” of any plant — they produce food through photosynthesis. When the plant does not get enough food, it becomes weak, and coconut production is hampered. This can also result in 50%–100% tree mortality.
This acute problem can be fully prevented by simple means, such as using naphthalene balls. At a time, one ball is sufficient per plant.
Control method:
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Take a piece of cloth.
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Pour some sand onto it.
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Then place one naphthalene ball on top.
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Tie the cloth into a knot with the sand and naphthalene ball inside.
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Keep this knotted cloth on top of the plant, near the leaf base.
The pest will eventually go away, the plant will develop healthy leaves, and coconut production will increase.
Instead of relying on costly preventive methods, if we equip our farmers with easy solutions such as these, a country that produces over 20 billion coconuts a year will not only maintain its leading position in the global coconut trade but also generate greater revenue in the coming years.
