海外「蚊を退治する新しい方法を発見したよ」

In July, mosquitoes appeared in the season. I’ve always heard that it’s better not to hit while you’re being stabbed, and that certain blood types are more likely to get stabbed, but is that true? I asked Yohei Izumi (48), an associate professor of biological resources science at Shimane University, who is familiar with the physiology and ecology of pests, about the authenticity of rumors and the ecology of mosquitoes. (Hitoshi Yoshino, S-Digital Editorial Department)


　Izumi mainly studies the ecology and control of pests such as mosquitoes and cockroaches. He is a pest expert who is an advisor to the development of Balsan products at LEC Corporation (Tokyo), known for manufacturing and selling insect repellent goods, including Balsan, an insecticide. First of all, Izumi taught me basic information about mosquitoes. Mosquitoes stop on the prey’s body and inhale blood and inject saliva that has an analgesic effect. The human body’s defensive response to saliva stimulates nerves and causes itching. It is said that there are about 100 kinds of mosquitoes in Japan, and they are largely divided into two types: “exploration type” and “ambush type.”

　The search type travels extensively in search of prey. Most mosquitoes you see in the house because they get in when you take in laundry. There are many brown-brown red-spotted woodpecker, and their activities peak in August, and they rarely see them after that. However, because they survive the winter as adults, the out-of-season mosquitoes seen occasionally in autumn and winter are the red sea bream. The ambush type, which lives in forests and forests and is called the “Yabuka,” is famous for its island-shaped “Human Sujishimaka,” which is active until around October. It is said that adults do not see eggs in winter because they lay and die, and eggs winter. Mosquitoes have surprisingly different ecology depending on their species.