Which piece of information is crucial when selecting a pesticide?

When selecting a pesticide, understanding the target pest, mode of action, and safety profile is essential for making an informed and effective choice. The target pest refers to the specific organism you aim to control; selecting a pesticide that is effective against this pest ensures that the application will yield the desired results. The mode of action describes how the pesticide affects the pest, which can influence both effectiveness and appropriate application methods. Additionally, the safety profile is vital for ensuring that the pesticide is safe for humans, pets, and the environment, helping to mitigate any potential risks associated with its use. This comprehensive approach allows for responsible and effective pest management, maximizing benefits while minimizing hazards.

Other options, such as the color of the pesticide, its container size, or the product's age, do not provide critical functional information necessary for effective pest control.