News
Whiteflies a growing threat to coconut and other crops in Sri Lanka
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.
News
Govt. extends ban on LTTE
The NPP government has issued a new extraordinary gazette renewing and extending Sri Lanka’s long-standing ban on the LTTE and several Tamil diaspora organisations and individuals, continuing to designate them as “terrorists”.
The gazette, published recently, replaces a previous gazette issued in May 2025 and reaffirmed the proscription of a wide range of Tamil political and advocacy bodies operating around the world, alongside dozens of named individuals. The government alleged both the organisations and individuals listed are involved in “terrorism-related activities”.
The organisations blacklisted by the Sri Lankan government include:
• Liberation Tigers of Tamil Eelam (LTTE)
• Tamil Rehabilitation Organisation (TRO)
• Tamil Coordinating Committee (TCC)
• World Tamil Movement (WTM)
• Transnational Government of Tamil Eelam (TGTE)
• World Tamil Relief Fund (WTRF)
• National Council of Canadian Tamils (NCCT)
• Tamil Youth Organisation (TYO)
While the majority of the designations mirror those contained in the May 2025 gazette, the latest document updates identification details and addresses for a number of individuals and introduces at least one additional organisation to the list. All entries have been reissued under new reference numbers for 2026, though the underlying allegations and framing remain unchanged.
Successive governemnts have maintained a sweeping proscription regime against Tamil diaspora groups and individuals. A ban can make it a criminal offence for Sri Lankan citizens to maintain contact with these organisations or their members, severely restricting political engagement and stifling links between the diaspora and the Tamil homeland.
The original mass listings were introduced in 2014 under the administration of Mahinda Rajapaksa. Despite repeated outcry, subsequent governments have continued to uphold and renew the proscription regime, even after the Rajapaksas were voted out of power.
News
Police obtain court order banning Wimal’s protest
Police yesterday (12) obtained an injunction order from the Kaduwela Magistrate’s court against the protest launched by National Freedom Front (NFF) leader and former Minister Wimal Weerawansa opposite the Education Ministry, Isurupaya, at Battaramulla.
Police informed Weerawansa of the court order. In line with the court order, the police informed Weerawansa that the road near the Ministry should not be obstructed and that no sound amplification equipment be used while the GCE Advanced Level (A/L) examination is in progress. The examination, put off due to Cyclone Ditwah, recommenced yesterday.
News
Chinese Foreign Minister Wang Yi expresses optimism that Sri Lanka is on the right path to progres
Minister of Foreign Affairs, Foreign Employment and Tourism Vijitha Herath held productive discussions with his Chinese counterpart Wang Yi today (12/01), during the latter’s brief visit to Sri Lanka.
The meeting aimed at further strengthening bilateral engagement and advancing the Strategic Cooperative Partnership between the two countries. Both Ministers reaffirmed the longstanding friendship and time-tested cooperation between Sri Lanka and China rooted in centuries of exchanges and consolidated since the establishment of diplomatic relations seven decades ago. The discussion also focused on enhancing partnership in the areas of trade, investment, development cooperation and tourism.
Minister Herath extended deep appreciation to the Government and the people of China for the steadfast support extended to Sri Lanka following cyclone Ditwah and requested further support for the second phase of resettlement, relocation and rebuilding, particularly for the restoration of affected infrastructure including identified roads, railways and bridges that are vital to connectivity, economic recovery and daily lives of people. Minister Wang assured China’s fullest support for this initiative and expressed confidence that Sri Lanka will continue its rapid recovery under the leadership of President Anura Kumara Disanayaka. He also welcomed the people-centric policies of the Government and expressed optimism that Sri Lanka is on the right path toward fulfilling aspirations of its people.
Minister Herath expressed appreciation for China’s constructive role in international fora and reiterated Sri Lanka’s firm commitment to the One China Policy and China’s sovereignty and territorial integrity.
Both Ministers also recalled the successful high level exchanges in the recent past, including visits of the President and the Prime Minister of Sri Lanka to China in 2025.
-
News2 days agoSajith: Ashoka Chakra replaces Dharmachakra in Buddhism textbook
-
Business2 days agoDialog and UnionPay International Join Forces to Elevate Sri Lanka’s Digital Payment Landscape
-
Features2 days agoThe Paradox of Trump Power: Contested Authoritarian at Home, Uncontested Bully Abroad
-
Features2 days agoSubject:Whatever happened to (my) three million dollars?
-
News2 days agoLevel I landslide early warnings issued to the Districts of Badulla, Kandy, Matale and Nuwara-Eliya extended
-
News2 days agoNational Communication Programme for Child Health Promotion (SBCC) has been launched. – PM
-
News2 days ago65 withdrawn cases re-filed by Govt, PM tells Parliament
-
Opinion4 days agoThe minstrel monk and Rafiki, the old mandrill in The Lion King – II
