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Whiteflies a growing threat to coconut and other crops in Sri Lanka

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Text and pictures by PRIYAN DE SILVA

White flies (Aleyrodidae) have become a threat to coconut and other agricultural crops in Sri Lanka. They damage plants by sucking out its juices. Heavily infested plants can be seriously weakened. Leaves often turn yellow, appear dry and drop prematurely. White flies also transmit crop viruses.

Deputy Director (Research) at the Coconut Research Institute (CRI) Lunuwila, Dr. Nayanie Aratchige says that around 1,500 species of White Fly have been reported from around the world of which four species, Aleurotrachelus atratus (Palm-infesting whitefly), Paraleyrodes minei (Citrus nesting whitefly), Aleurodicus dispersus (Spiraling whitefly) and Aleurodicus cocois (Coconut whitefly) are presently a threat to coconut palms in Sri Lanka.

Dr Aratchige said that the first mention of the White Fly plaguing coconut palms was in Barbados in 1846, and that outbreaks have been reported in the Caribbean and South American regions since the 1990s and outbreaks of Rugose spiraling whitefly (Aleurodicus rugioperculatus) in India since 2016.

The species Aleurodicus dispersus (spiraling white fly) has been present in Sri Lanka since 1990 but it was previously considered a minor pest to coconut palms.

The first major white fly outbreak in coconut plantations in Sri Lanka was reported in 2019 from the Kegalle District and it is believed to have been caused by the accidental introduction of a new species via illegal importation of seedlings, the impact of climate change, sudden drop of natural enemy populations of the native population of whiteflies due to excessive use of insecticides on other crops.

Dr. Nayanie Aratchige

Dr Aratchige said that White Flies had invaded coconut plantations in Gampaha, Kegalle, Kandy, Kalutara, Colombo, Kurunegala, Ratnapura, Puttalam and even the Galle, Matara and Hambantota Districts, which have been battling the Weligama Coconut Leaf Wilt disease for over a decade.

Banana, guava, citrus, avocado, eggplant, okra, cashew, Indian almond (Kottamba), caryota palm (Kithul palm), areca nut, ornamental plants, curry leaves, green chillie, mango, jackfruit, breadfruit, neem, pigeon pea, different varieties of pepper, Water melon, coffee, etc., host the White Fly.

The Coconut Research Institute and the Coconut Cultivation Board are conducting awareness programmes on the identification of the pest and coordinated spraying of insecticides.

Sticky traps

Dr Aratchige said that placing yellow sticky traps or spraying of the following insecticides to control the menace is recommended.

Neem oil and soap mixture

(Neem oil – 10 ml, Soap powder – 05 g dissolved in 1 L of water) or

Thiamethoxam (Actara)

(3g in 10 l of water) or Carbosulfan (Marshal 20) (20ml in 10 l of water) or Chlorantraniliprole+Thiomethoxam (Virtako 40G) (2.5g in 10 l of water)

Neem oil and soap mixture is recommended for all infested areas as this mixture is less toxic to the natural enemies of whiteflies. Artificial insecticides are particularly recommended for newly infested areas and the coconut seedling nurseries.

The CRI is further researching on methods of chemical and biological control and have sought assistance from other countries for importation of exotic natural enemies of the white fly.



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Indonesian Navy Sailing Ship KRI BIMA SUCI – 945 makes port call in Colombo

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The Indonesian Navy Sailing Ship KRI BIMA SUCI – 945 arrived at the Port of Colombo on a goodwill visit on 15 Apr 2026 and was welcomed by the Sri Lanka Navy (SLN) in compliance with time-honoured naval traditions.

The vessel’s arrival is a key highlight of the ASEAN Plus Cadet Sail (APCS) – 2026 programme , accompanying a diverse contingent of Navy cadets from 26 different nations alongside their Indonesian counterparts.

The ship is commanded by Commander SUGENG HARIYANTO. Meanwhile, Officer Under-trainees of the Sri Lanka Navy are expected to participate in various programmes aboard the
ship and naval personnel observe its operational functions during its stay in the island.

Furthermore, the ship’s crew is scheduled to take part in programmes organized by the Sri Lanka Navy to enhance camaraderie between the two navies, as well as visit several tourist attractions in the country.

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PM initiates children into learning at the auspicious time while observing New Year traditional customs and rituals

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The Sinhala and Tamil New Year cultural festival, organized by the Ministry of Buddha Sasana, Religious and Cultural Affairs, was held on Tuesday  (14) in Gampaha under the patronage of Prime Minister Dr. Harini Amarasuriya, with the performance of traditional auspicious customs and rituals.

In accordance with tradition, during the Punya Kalaya (inauspicious time), the Prime Minister visited the Medagama Sri Sunandarama Viharaya in Gampaha and participated in religious observances and received blessings from Venerable Thunmodara Samitha Thero, a member of the Karaka Sangha Sabha of the Sri Lanka Ramanna Maha Nikaya and the Chief Incumbent of the Medagama Sri Sunandarama Dharmaduta Piriven Viharaya.

The traditional observances of the Sinhala and Tamil New Year cultural festival were held at the residence of Darshana Weerasinghe in Gampaha. Marking the auspicious time for commencing work, and upon the invitation of the host family, the Prime Minister planted a sapling within the premises. Concurrently, Minister of Buddha Sasana, Religious and Cultural Affairs, Dr. Hiniduma Sunil Senevi, and Minister of Foreign Affairs and Tourism, Vijitha Herath, joined the PM.

Subsequently, the Prime Minister joined children in engaging in traditional folk games.

At the auspicious time for engaging work and educational activities, the PM participated with children in reading and writing, guiding them and symbolically marking the commitment to advancing the educational development of the nation’s children.

Thereafter, the Prime Minister and other distinguished guests observed the traditional customs of exchanging greetings, transactions and gifts with the host family, and joined them to partake in the customary New Year meal.

Extending New Year greetings to all citizens, the Prime Minister expressed her gratitude to all Sri Lankans, both at home and abroad, for their contributions in overcoming and effectively managing the various challenges faced by the country.

Speaking at the occasion, Minister Dr. Hiniduma Sunil Senevi stated that the Sinhala and Tamil New Year festival symbolizes renewal and purity, and reflects the energy of the sun. He also conveyed his wishes for a peaceful and prosperous New Year for all.

The occasion was attended by the Deputy Minister of Finance and Planning and Minister of Labour, Dr. Anil Jayantha; Deputy Minister of Labour, Mahinda Jayasinghe; Member of Parliament for the Gampaha District, Ruwan Mapalagama; along with the Gampaha District Secretary, Mayor, Divisional Secretaries, and a large number of government officials.

(Prime Minister’s Media Division)

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Navy seize an Indian fishing boat poaching in seas north of Mannar

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During an operation conducted in the dark hours of 13 Apr 26, the Sri Lanka Navy seized an Indian fishing boat and apprehended 04 Indian fishermen while they were poaching in Sri Lankan waters, in the sea area north of Mannar.

The seized boat and Indian fishermen  were handed over to the Fisheries Inspector of Kilinochchi for onward legal proceedings.

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