What type of organism is targeted by nematicides?

Nematicides specifically target nematodes, which are microscopic, worm-like organisms that can cause significant damage to plant roots and overall plant health. These targeted organisms belong to the phylum Nematoda and can be parasitic, feeding on the roots of various crops and ornamental plants. The use of nematicides helps manage these pests by either killing or repelling them, thereby protecting plants from the detrimental effects of nematode infestations.

The other options involve different types of organisms that nematicides do not affect. Weeds are typically managed with herbicides, fungi with fungicides, and pests with exoskeletons (such as insects) are treated with insecticides. Each type of pesticide is formulated to target specific pests or plant diseases, making nematicides unique in their function by being effective solely against nematodes.