What effect is categorized by immediate injury upon contact with a pesticide?

The correct answer is local effects. Local effects refer specifically to the immediate injury or response that occurs at the site of contact when a pesticide comes into contact with skin, eyes, or other localized areas of the body. This can manifest as irritation, redness, or burns, all of which are direct reactions to the pesticide.

Understanding local effects is crucial for pesticide applicators, as it highlights the importance of personal protective equipment (PPE) and safe handling practices to prevent direct exposure. In contrast, systemic effects involve the absorption of the pesticide into the bloodstream, where it can affect internal organs and systems, and typically do not occur immediately upon contact. Acute effects denote health issues that occur rapidly after exposure, but those could be systemic or local, depending on the nature of the pesticide and the exposure route. Long-term effects refer to impacts that appear over an extended period after exposure, such as chronic health issues, and do not relate to immediate injuries.