The caterpillar lives polyphagous in the herb layer. I obtained young caterpillars from samples of Silene nutans (forest gap system, Lindauer Hütte, Montafon, west Austria, 1700m above sea level, July 2007).
Mniotype adusta inhabits wet to moderately dry (at higher altitudes) forest gap systems, stream margins, grove rich hillsides, forest margins to pastures, fringes in forests, dwarf shrub belts and other extensive, sunny to semi-shaded areas. Mountain ranges are clearly preferred.
The moths fly from mid-May to early August. The caterpillar develops from mid-June to early or mid-September and digs then to construct the pupation cocoon. But the actual pupation occurs only in the spring.
Endangerment: regionally endangered or decreasing
Mniotype adusta is locally in decline especially in the lower regions of its distribution through intensive forestry and agriculture as well as other land use for the interests of the people.
Mniotype adusta is widespread Holarctic (most of Europe, temperate Asia and North America).