What is the primary purpose of a nematicide?

The primary purpose of a nematicide is to control nematodes, which are microscopic, worm-like parasites that can adversely affect plant health. Nematodes often feed on plant roots, leading to reduced growth, decreased yields, and sometimes even plant death. By using nematicides, growers can target these pests specifically, thus improving the overall health of the plants and enhancing productivity.

The other options do not align with the primary function of nematicides. For instance, while controlling insect larvae is vital for pest management, insecticides would generally be used for that purpose instead. Similarly, preventing fungal infections relates to fungicides, not nematicides, and enhancing soil fertility pertains to fertilizers or soil amendments rather than to nematicidal action. Each of these alternatives serves different roles in agricultural practices, but only nematicides focus specifically on combating nematode populations.