Why should termiticides designed to bind to soil NOT be applied to water-saturated soil?

Termiticides designed to bind to soil are formulated to adhere to soil particles, which enhances their effectiveness in combating termite infestations. When soil is water-saturated, the pores between the soil particles are filled with water rather than air, significantly reducing the ability of the termiticide to adsorb or bind effectively to the soil. This reduced adsorption means that the termiticide may not stay in the targeted area for a sufficient amount of time to control termite activity, ultimately compromising the treatment's effectiveness.

The other choices pertain to potential legal implications, environmental impact, and efficacy concerns. While it is important to consider the legality of pesticide application and the environmental safety regarding application near water bodies, the primary reason for avoiding application on water-saturated soil centers around the physical and chemical interaction between the termiticide and the soil, which is greatly diminished when soil is saturated with water. Thus, the correct reasoning primarily revolves around the chemistry of soil and how termiticides function, making choice B the best answer.