The allium leafminer (Phytomyza gymnostoma) damages crops onions, garlic, shallots, and leeks via egg-laying in plant tissue and, to a greater degree, through larval feeding on foliage. Native to Europe, the invasive species was first discovered in North America in December 2015 in Lancaster County, Pennsylvania. (Image originally published in Barringer et al 2018, Journal of Integrated Pest Management)