The larvae feed on Carex digitata, Carex ericetorum, Carex flacca, Carex humilis, Carex ornithopoda, Carex pilosa, Deschampsia cespitosa, Melica and Sesleria caerulea. They mine the leaves of their host plant. The mine generally descends from the leaf tip and may occupy the space between the leaf margin and midrib, but may also occupy the entire width of the leaf. Most frass is deposited in the oldest part of the mine. Pupation takes place outside of the mine. Larvae can be found from late summer to the following spring. The species overwinters within the mine. They are yellowish white with a dark brown head.
- "Elachista (Elachista) cinereopunctella (Haworth 1828)". 2.6.2. Fauna Europaea. August 29, 2013. Retrieved November 8, 2013.
- Swedish Moths
- "Elachista cinereopunctella (Haworth, 1828)". Bladmineerders.nl. Archived from the original on September 27, 2012. Retrieved September 23, 2011.
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