What are rodenticides?

Explanation

**Step-by-Step Text Solution:**

1. **Definition of Rodenticides**: Rodenticides are chemicals specifically designed to kill rodents, which are small mammals that include species such as rats and mice.

2. **Importance of Rodenticides**: Rodents can significantly harm crops by feeding on them. They tend to come out at night and can damage the plants, leading to a decrease in crop yield.

3. **Mechanism of Damage**: Rodents not only crush the crop plants but also consume the nutrients from them, which further affects the growth and health of the crops.

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