2, not all bitter plants can repel mosquitoes, such as Andrographis paniculata, which is particularly bitter, but has no mosquito repellent effect. Although mint has mosquito repellent effect, its effect is poor. Mosquitoes just don't like being near plants. In a room of seven or eight square meters, relying on a plate of mint to repel mosquitoes is not very useful. The best mosquito repellent plant is pyrethrum, and other plants that can repel mosquitoes are similar to mint.
Extended data:
Mosquito repellent skills
1, put a few boxes of essential balm and cooling oil in the room, or put some mint on the wall.
2. Sprinkle some perfume on your body or pillow.
3. Grind the mothballs and scatter them in the corner of the house.
4. Plant one or two tomatoes in an indoor flowerpot. The smell of tomato branches and leaves will drive away mosquitoes.
Hang a handful of shallots under the lamp, or wrap a few shallots with gauze, so that all kinds of bugs will not fly.
6. Cover the light bulb with orange cellophane or silk. Mosquitoes are most afraid of orange light
Reference: Baidu Encyclopedia-Mosquitoes (including mosquito repellent methods)