Pasiphila debiliata, the bilberry pug, is a moth of the family Geometridae. It is found from Europe, east to southern Siberia, the Amur region and Japan.

The wingspan is 17–19 millimetres (0.67–0.75 in). The ground colour is a very delicate, evanescent pale green, the crosslines are much weak, strongest on the veins. — ab. nigropunctata Chant, has only the principal lines, these being marked as strong vein-dots. — grisescens Dietze is silvery grey without a tinge of green. Discal spot present.

The larva is light green with scattered, fine, pale bristles.

Adults are on wing from June to July.

The larvae feed on Vaccinium myrtillus.

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