The things that cockroaches are most afraid of can be summarized as follows:
1. Boric acid: Boric acid is toxic to the nervous system of cockroaches and can directly cause their death. The use of insecticides containing boric acid or homemade boric acid potatoes can effectively eliminate cockroaches.
2. Natural camphor balls and certain aromatherapy agents: The scent of natural camphor balls has a strong repellent effect on cockroaches and can interfere with their navigation system. The scent of aromatherapy such as lavender, rosemary, and mint also has a repellent effect on cockroaches because these odors are very uncomfortable for them.
3. Dry environment and sound: Cockroaches prefer damp environments, and their survival ability will be greatly weakened in dry environments. Maintaining a dry indoor environment is an important way to prevent the breeding and survival of cockroaches. Certain sounds such as the sound of boiling water or high-frequency sound waves emitted by ultrasonic insect repellents can also make cockroaches feel uneasy and fearful, thereby driving them away.
The smell, dry environment, and specific sounds of boric acid, natural camphor balls, and fragrances are all feared by cockroaches. When controlling cockroaches, these methods can be comprehensively applied to achieve better results.