i just bumped my head!

i didnt really but an idea has formed or maybe an experiment! I am an hairdresser by trade and something i know to work on nits is tea tree oil!
Now i am not suggesting you put this straight on your plants but most insects that i am aware of do not like this natural oil and will steer clear of it!
I think i may put a cold glass of oil near my plants to see if it maybe beneficial to getting rid of e.g. carrot fly not dissimilar to the nit also known as pediculosis capitas, i am always interested to see if ideas that forem can create difference,just wondered if anyone would like to take this journey or maybe already has been done with what effect?

maybe just a few (10?) drops neat into a dosage glass put under a plant (to keep rain out) and let the oil evaporate slowly on the plot?