Which statement about pesticide toxicity is true?

The statement about pesticide toxicity that is accurate is that a pesticide with an oral LD50 of 5 mg/kg is more toxic than one with an LD50 of 250 mg/kg. LD50, which stands for "lethal dose, 50%," represents the amount of a substance that is required to kill 50% of a tested population, typically laboratory animals. The lower the LD50 value, the more toxic the substance is considered to be because it indicates that a smaller dose is required to achieve lethal effects. In this example, since 5 mg/kg is significantly less than 250 mg/kg, the pesticide with the lower value (5 mg/kg) is indeed more toxic.

The other statements do not hold true in the context of pesticide toxicity. Manufacturers are often required to include chronic toxicity information on product labels to ensure safe handling and usage guidelines. The signal word on a label reflects both acute toxicity and the potential for chronic effects, making it more comprehensive than simply indicating acute toxic effects. Lastly, pesticide toxicity is highly related to dosage; a particular substance may be safe at certain dosages and toxic at others, illustrating the fundamental principle that toxicity often correlates with the quantity administered.