Seems Gifting a Princess the Withered Cornucopia then spamming her with Frog's Viscous Water is bugged
Was trying this as Insecticide however it doesn't seem to register her having it equipped
v0.16.8
Patches/Patch1560484394.rvdata2
Changed Common Event 830 "FrogWat eff Harvest" and Map 17 "Insect Princess Chambers" to properly register Withered Cornucopia being equipped by a Princess.
Though at the moment this only effects Harvest Princess and Insect Princess
Edit: For those who are wondering you can't kill Insects while they are underground... Seems Common Event "*DailyF* We/Pop Check " only checks if they are ready for Ruin if they are Surfaced First.