Which of the following statements about granules is true?

Granules are a form of pesticide or fertilizer that, when applied, release their active ingredients over time. The statement that they are most effective when watered in is true because watering helps to activate the granules, allowing them to dissolve and penetrate the soil more efficiently. This activation enhances the bioavailability of the active ingredients, making them more effective in reaching their target organisms or plants.

When granules are watered in, the moisture facilitates the absorption of the substance into the soil, ensuring that it can be taken up by the root systems of plants or can encounter pests in the ground. This method maximizes the potential benefits of the granules, whether they are being used for pest control or providing nutrients to the soil.

In contrast, the other statements do not accurately represent the behavior and use of granules. For instance, the idea that granules are least effective when watered in contradicts the understanding of their activation process, and stating that they are only used in gardens limits their applications, as they can be utilized in various settings, including agricultural fields and landscapes. Lastly, suggesting that granules cannot be applied in wet conditions ignores that, while caution may be needed, many formulations are designed to be effective in diverse weather conditions, and their application may sometimes