Aculus truncatus explained

Aculus truncatus is a species of mite which causes galls on the leaves of purple willow (Salix purpurea). It was first described by Alfred Nalepa in 1892.

Description

The gall is a short, NaNmm narrow twisted, downward roll on the leaves of purple willow (S. purpurea). It is lined with red hairs and contains mites.^{[1] [2] [3]}

Similar looking galls have also been found on common osier (S. viminalis) and on sallows, which could also be A. truncatus. The mites should be identified by an expert.^[1]

A. truncatus has also been known to use Salix alba as a host.^[4]

Notes and References

1. Book: Redfern. Margaret. Shirley. Peter. Bloxham. Michael. British Plant Galls. 2011. FSC Publications. Shrewsbury. 978-1-85153-284-1. 282–299. Second.
2. Web site: Aculus truncatus (Nalepa, 1892). Ellis. Willem N.. Plant Parasites of Europe. 13 January 2018.
3. Book: Alford, David V.. Pests of Ornamental Trees, Shrubs and Flowers. Elsevier. 2012. 978-0-12-398515-6. Second. Mites. 405–433 . 10.1016/B978-0-12-398515-6.50003-3 .
4. Ripka. Géza. 2008. Additional Data to the Eriophyoid Mite Fauna of Hungary (Acari: Prostigmata: Eriophyoidea). Acta Phytopathologica et Entomologica Hungarica. 43. 1. 143–161. 10.1556/APhyt.43.2008.1.15. ResearchGate.