A few days ago, I found that the plant had small flying insects. I sprayed some medicine (high chlorofluoride) at night. The flower head broke the next day, my God
Just topped her accidentally. Won’t be too bad when two stems grow back to replace the one.
You will have new growth. Just be patient. It may turn out better than planned.
Any pics of the pest? Sticky traps, CJDB works great. Sprinkle or mix some mosquito bits up and top dress or top feed