Two species of introduced #wasps are natural enemies (good!) of the #economically damaging, also introduced spotted wing #drosophila which attacks small fruits (#agricultural and #wild).
The wasps' ability to lay eggs on #fly maggots depends on the ovipositor dimensions. New research (Earley et al. 2023) shows the two species egg-laying organ length and/or stoutness varies by species and where they live.
#Evolutionary implications for using these species for control.