Which of the following isn't a class of termiticide?

Sterilants are not classified as a class of termiticide in the context of termiticides used for controlling termite populations. Instead, sterilants are typically substances that inhibit reproduction or affect the reproductive capabilities of organisms. In the field of pest management, particularly regarding termites, we focus on different classes of termiticides that are specifically designed to kill or repel these pests.

Fipronil, Chlorfenapyr, and Neo-nicotinoids are all recognized groups of termiticides. Fipronil is a widely used active ingredient known for its effectiveness in treating termite infestations. Chlorfenapyr is another group that works by disrupting the insect's energy production, leading to its death. Neo-nicotinoids are a class of insecticides modeled after nicotine that disrupt the central nervous system of the pest, providing additional options for termite control.

Understanding these distinctions helps in the effective management of termite infestations and clarifies how various substances work within the pest control framework.