What term describes a pesticide formulated specifically to control nematodes?

The term that describes a pesticide formulated specifically to control nematodes is "nematicide." A nematicide is designed to target and eliminate nematodes, which are microscopic roundworms that can cause significant damage to plant roots and other parts. These specialized chemicals work by either killing nematodes on contact or being absorbed by the plant, providing systemic control.

In contrast, the other options refer to different contexts. "Nematode" is a term that identifies the organism itself, rather than a product used to control it. "Neonicotinoid insecticide" refers to a specific class of insecticides that primarily target insects and not nematodes. "Nontarget organism" encompasses any organism that is not the intended target of the pesticide application, which does not specifically relate to the control of nematodes. Thus, "nematicide" accurately identifies the product intended for that purpose.