What are nematicides?

Nematicides are specifically designed to manage nematodes, which are microscopic, worm-like organisms that can be harmful to plant health. These chemicals either kill the nematodes directly or disrupt their life cycle, thereby reducing their population in the soil.

The indication that nematicides are "highly toxic fumigants and drenches" highlights their potency in controlling nematode infestations, often employed in agricultural and horticultural settings where nematodes are known to cause significant crop damage. This understanding is critical for anyone involved in pest management, as it emphasizes both the effectiveness and the caution needed when applying these substances, given their toxicity to non-target organisms and potential environmental impact.

The other options—promoting soil fertility, enhancing plant growth, and eliminating weeds—represent entirely different functions that do not relate to nematode management. Fertilizers and herbicides serve distinct purposes in soil and plant management, illustrating the specificity of pest control methods in agriculture.