What are nematicides?

Nematicides are specialized chemicals specifically designed to control nematodes, which are microscopic worm-like parasites that can be harmful to plant health. These substances can be highly toxic and may come in the form of fumigants or drenches—the former being gaseous substances that penetrate soil, while the latter involve applying a liquid solution directly to the soil. Their primary objective is to manage nematode populations that can negatively affect crops and turfgrass, causing stunted growth or disease.

The other options do not accurately describe nematicides. Fertility-promoting chemicals and organic fertilizers serve to enhance soil quality and support plant growth, but they do not address nematode control. Herbicides are targeted at eliminating weeds, which is a different aspect of pest management. Thus, the focus on toxicity and effectiveness against nematodes solidifies why the description of nematicides as highly toxic fumigants and drenches for nematode management is correct.