殺虫剤 (satchuuzai) Japanese meaning: insecticide | KotomoraA cockroach appeared, so I bought some insecticide.
Farmers use pesticides to protect their crops.
Usage patterns
〈虫〉に殺虫剤をかけるto spray insecticide on an insect
I sprayed insecticide on the cockroach.
〈場所〉に殺虫剤をまくto scatter/spray insecticide in a place
I sprayed insecticide around the garden.
殺虫剤の効果が切れるfor the effect of an insecticide to wear off
The insecticide's effect wore off and the bugs came back.
