Which type of pesticide is constructed to mimic hormones that control insect development?

The correct choice is IGR, or Insect Growth Regulator. These pesticides are specifically designed to interfere with the normal hormonal processes that insects use for development and growth. By mimicking the natural hormones in insects, IGRs can disrupt their life cycle at various stages, preventing them from maturing into adults or reproducing effectively. This capability makes IGRs effective for controlling pest populations in a targeted manner while minimizing harm to non-target organisms.

Fungicides, on the other hand, are designed to manage fungal infections and are not related to insect growth regulation. Herbicides target weeds and are aimed at controlling unwanted plant species rather than insects. Acaricides are used to control mites and ticks but do not possess the hormonal action characteristic of IGRs. Thus, the focus and mechanism of action inherent in IGRs make them the appropriate choice in this context.