Acute toxicity typically results in effects that occur within how many hours of exposure?

Acute toxicity is characterized by the immediate or short-term effects that occur shortly after exposure to a substance, such as a herbicide. Generally, these effects manifest rapidly, usually within 24 hours following exposure. This timeframe is critical for understanding how quickly a substance can impact human health or the environment.

In this context, 24 hours is considered the upper limit for acute toxicity effects, as they can appear within minutes to a few hours but generally do not exceed this timeframe. Recognizing the rapid onset of acute effects is essential for applying appropriate safety measures, monitoring, and reporting in pesticide use and management.