Phytomyza chaerophylli is a species of leaf mining fly in the family Agromyzidae which is found in Europe.[1]
The larvae make a short upper-surface gallery following a leaf margin which widens, so that within the confined limits of some umbelliferous leaves often forms a secondary blotch. The frass is in two untidy rows of isolated grains. Larvae leave the leaf through a semi-circular slit in the lower epidermis to pupate in the soil.[2] [3] Plant species which the fly larvae feed on include Sison amomum.[4]
Mines and larvae can be found throughout the winter, the first generation from April to July although larvae can be found feeding through most of the year.[3]
Widespread and common throughout much of Europe.[3]