Which of the following is a type of chemical used to control fungal diseases?

Fungicides are specifically designed to control fungal diseases, which can affect plants, crops, and sometimes even humans. These chemicals work by targeting various life stages of fungi, inhibiting their growth, or eradicating them entirely. They play a critical role in agriculture and horticulture by protecting plants from diseases that can lead to reduced yield or quality.

Pesticides is a broad term that encompasses any chemical used to kill pests, which includes fungicides but also encompasses a range of other specific chemicals for different types of pests. Herbicides are targeted specifically at controlling weeds, while insecticides are intended to manage insect populations. Therefore, while both pesticides and fungicides fall under the umbrella of pest control methods, only fungicides are effective against fungal pathogens. This focused action on fungi makes fungicides the correct answer for managing fungal diseases.