Insecticides

noun a synthetic organic compound used as an insecticide

• DDT, or dichlorodiphenyltrichloroethane, was once widely used as a pesticide but has since been banned in many countries due to its harmful effects on the environment and human health.
• I heard they used to spray DDT all over the fields back in the day to get rid of bugs.
• Don't mess with that stuff, it's like DDT for your brain.
• Her criticism was like DDT to his ego, leaving him feeling completely destroyed.

noun a substance or agent used to kill adult insects

• The city council decided to use adulticide to control the mosquito population.
• They're going to spray adulticide in the park to get rid of the mosquitoes.
• Let's hit those bugs with some adulticide and get rid of them once and for all.
• Sometimes we need to use adulticide to eliminate the negative thoughts that plague our minds.