WebJan 11, 2024 · Floating pennywort ( Hydrocotyle ranunculoides) is a an aquatic plant which forms dense mats of rounded leaves that float across the water’s surface. It is most common in the wild in south east England, but is appearing more often across the rest of the country. The first record of floating pennywort in the United Kingdom was in 1990. WebFloating pennywort: Combination treatment using herbicides and physical removal. Action Link: Unknown effectiveness (limited evidence) 1: Synopsis Link: Floating pennywort: …
South American weevils released in UK waterways to tackle
WebNov 16, 2024 · Since 2011, CABI, with Defra funding, has been investigating the potential use of a biocontrol agent for floating pennywort which has the ability to grow up to 20 centimetres each day. It forms dense rafts over rivers and harms native plant, fish and invertebrate species, through competition and cutting oxygen levels in water. WebResearch into the biocontrol of floating pennywort using the Argentine weevil, Listronotus elongatus has been funded by Defra since 2011. The weevil has undergone … twist health
Invasive non-native plants and biocontrol BBC Wildlife Magazine ...
WebFloating pennywort (Hydrocotyle ranunculoides) The weevil Listronotus elongatus was approved for release into the wild in the UK in autumn 2024 after a decade of safety and … WebOct 12, 2024 · Floating pennywort (Hydrocotyle ranunculoides) is an aquatic plant that was introduced to the UK in the 1980s by the aquatic nursery trade. ... Biocontrol: The Centre for Agriculture and Biosciences International (CABI) are currently working on controlling floating pennywort using biological control, specifically a weevil from South America ... WebSupporting evidence from individual studies. A replicated laboratory and field study in 2011 in South America (Walsh & Maestro 2011) found that the South American weevil Listronotus elongatus, was the most common herbivore on floating pennywort and caused more feeding lesions on floating pennywort than on any other plant species, but field results … twist headphones hd speakers