That won't work well as a stencil yet... Needs more bridges... Also the t and c should be separated (to avoid it flapping).
The face will also become a flap if there's not more bridges.
Also you shouldn't just spray paint. You should brush the stencil edges lightly with a glue first, so any gaps between the stencil and wall are closed. It gives you much more crisp lines and is worth it.
Other than that, good artwork and creativity! Keep creating!
The pesticide in question was "paraquat dichloride" and 10 others (unnamed but perhaps related to paraquat dichloride, as that was her focus).