What was the reason the narrator in top of the food chain give for originally spraying the DDT?

In "Top of the Food Chain," the narrator explains that he originally sprayed DDT to combat a devastating mosquito infestation that was threatening public health and comfort. At the time, he believed the benefits of controlling the mosquito population outweighed the potential environmental risks. However, he later reflects on the unforeseen consequences of this decision, highlighting the complex and often detrimental impact of pesticide use on the ecosystem.