If you have a problem with killing bugs with booze, remember, at least they die happy.
I have dealt with this in a past posting but a new simpler design is what I call the dolmen.
Simply sink an old jar or can into the bed until the rim is just clear of the soil.
Then place some stones around it to give some clearance and cover with a small slab of slate or stone.
Alcohol sprays are good as organic garden pest control, especially against aphids, whiteflies, and mealybugs. If you are using meths alcohol spray, use the 70%. Mix one litre of water with 300ml of alcohol.
Never spray your plants with undiluted alcohol.
Do a test, spray a few leaves first and check for damage.
Any injury to your plant should be apparent within a few days.
Then Fruit Flies - they have been known to like a tipple - real rot gut.
Fill up a saucer of some cheap white wine and add a little detergent to it.
Leave it around for the flies to sip and die
Finally, although debatable I find this method effective at times. Do you have a problem with cats and dogs? Plan this for when you expect them. Get a skinfull - I find cheap whisky best - then after it takes effect run around half naked, ranting, screaming abuse and chucking random items at the offending animals, works for a short period anyway and at least it gives the neighbours something to talk about- may attract men with white coats.
While reading this post, why not check out one of the best bands ever to come out of Canada, kinda a theme song for me at times.