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Thursday, May 26, 2022

Kenyan scientists discover invasive snail damaging rice farms

Kenyan scientists have discovered an invasive snail that is damaging rice farms, Theophilus Mutui, the Managing Director, Kenya Plant Health Inspectorate Service (KEPHIS), said on Friday, March 26, 2021.

Apple snail
Apple snail

“Given the impact of this species in Asia, there is the need for an assessment of its risk to Africa and the implementation of an appropriate response in Kenya and elsewhere to manage this new threat to agriculture and the environment.

“The apple snail, scientifically known as ‘Pomacea canaliculata’, threatens Kenya’s rice production, especially, in Mwea region where over 70 per cent of Kenya’s rice is grown.

“The snail is widely considered to be one of the most invasive invertebrates of waterways and irrigation systems.’’

Mutui said that since it was first detected in Mwea irrigation scheme in central Kenya,that the snail has spread gradually to other parts of the country.

He added, “To manage the spread of the snail, local farmers will be trained, the public will be made aware of its dangers, physical barriers will be installed, and the use of mechanical control and community-based snail management will also be promoted.’’

Ivan Rwomushana, a senior scientist in Invasive Species Management at the Nairobi-based Centre for Agriculture and Biosciences International (CABI), said that findings had shown that other irrigation schemes in Kenya were yet to be affected.

“Although seed and machinery brought from Mwea pose a risk for invasion.

“We will work with the relevant national agencies to develop a rapid response and containment strategy to tame this new invasive species,” Rwomushana said.

The snail has become an agricultural and ecological pest, causing significant economic losses in wetland rice cultivation and threatening biodiversity in Asia.

The snail is listed among 100 of the world’s worst invasive species.

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