Impossible. Dr. Bushroot wouldn't hurt a fly. Well, there was that one time, but then we needed the wings for an experiment.
8 seconds sound clip from Darkwing Duck - Beauty and the Beet (S1E3).
You can hear this line at 00:13:29.142 in the DVD version of the TV Series.
Quote context
[...]
- Oh, poor Dr. Bushroot. I feel so sorry for him.
- You feel so sorry for that villainous vegetable? That flipped-out felonious flora?
- I'm the one with the Swiss cheese cape!
- Well, I'm sure whatever happened, Dr. Bushroot didn't mean it.
- Are you kiddin'? If it wasn't for DW, we'd be side dishes at the salad bar.
- She called me Reginald. Rhoda called me Reginald. Not Dr. Bushroot, but Reginald.
[...]