Created 21-Jul-11
Modified 21-Feb-12
Visitors 52
49 photos
Photo's updated 5 January 2012. For the latest photo's scroll down the thumbnails.

This gallery shows the progress for the control of a very damaging invasive water fern called Azolla Filiculoides using a biological control method with the weevil Stenopelmus Rufinasus.

This is a small pond teeming with wildlife. It has had its ups and downs over recent years with the biggest threat to this little pond being a non-native invasive water fern called Azolla filiculoides (water fern). It is a very invasive pond fern that can ultimately kill the majority of wildlife within the water body if control/elimination is not implemented.

A very effective biological control method using a non-native weevil called Stenopelmus rufinasus will get this under control, but will take many weeks before any substantial progress can be seen.

A link containing the information about the invasive weed Azolla:

http://www.nhm.ac.uk/nature-online/species-of-the-day/biodiversity/economic-impact/azolla-filiculoides/index.html


A link to a very informative case study of the use of the weevil Stenopelmus rufinasus used as biological control for Azolla:
http://invasivespeciesireland.com/wp-content/uploads/2010/11/Case_Study_4_Biological_control.pdf


Another link to an information sheet about Azolla:
http://www.invasivespeciesscotland.org.uk/invasive_non_native_species/water_fern.asp

Categories & Keywords
Category:Animals
Subcategory:Wildlife
Subcategory Detail:
Keywords:Azolla, Azolla filiculoides, Reigate, Reigate Castle Grounds, Reigate Castle Grounds moat pond, Reigate Surrey, Stenopelmus rufinasus, fairy moss, invasive pond plants, invasive water fern, moat pond Reigate, pond weed, weevil, weevil Stenopelmus rufinasus

Pre-Azolla on 17 May 20112nd June 201119 July 201119 July 201119 July 201119 July 201119 July 201126 July 201126 July 201126 July 201126 July 20119 August 20119 August 20119 August 20119 August 201111 August 2011 - weevils in 10 August11 August 2011 - weevils in 10 August11 August 2011 - weevils in 10 August11 August 2011 - weevils in 10 August17 August - 1 week later