If you’ve ever noticed nipple-like swellings on hackberry leaves, you already know a little about the hackberry nipplegall maker, Pachypsylla celtidismamma.  Pachypsylla is a genus of tiny insects that grow up inside galls that form on hackberry leaves.  Like other gall makers, Pachypsylla adults lay their eggs on leaves, which then start to swell around the egg or developing larva, forming a gall. After feeding on the gall tissue all summer, Pachypsylla adults emerge in the fall. Unfortunately for fastidious homemakers, these adults commonly enter structures at this time in their… Read More →