What term describes a pesticide formulated specifically to control nematodes?

The term that describes a pesticide formulated specifically to control nematodes is "nematicide." This classification of pesticide is designed to effectively target and suppress nematode populations, which can be harmful to crops and plants. Nematicides work by either killing nematodes or inhibiting their activity, thereby reducing their impact on agricultural productivity and plant health.

In contrast, the other terms provided refer to different concepts. "Nematode" refers to the actual type of organism that nematicides are designed to control, while "neonicotinoid insecticide" refers to a class of insecticides that affects insects rather than nematodes. "Nontarget organism" describes any organism that is not the intended target of a pesticide, meaning that it does not specifically relate to nematode control. Thus, "nematicide" is the clear and correct choice for a pesticide aimed at nematodes.