What is the legal authority governing: "Chemical Compound X has an oral LD50 of 15 mg/kg. Chemical C..."?

This standard is governed by 40 CFR § 156.62 under the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) and 40 CFR Part 171.

What is the passing score for the EPA Pesticide Applicator exam?

The minimum passing score for the National Core Pesticide Applicator Certification exam is 70% (40 CFR § 171.103).

Pesticide Hazards And First Aid MEDIUM 40 CFR § 156.62

A Compound Y, because 4,500 is a much higher number than 15.

B Compound X, because a smaller dose is required to kill 50% of the test population. ✓ OFFICIAL VERIFIED CORRECT ANSWER

C Both compounds have identical mammalian lethality.

D Neither compound is toxic because LD50 only measures soil microbes.

40 CFR § 156.62

Official Manual Chapter: Chapter 5: Hazards & Toxicity

LD50 (Lethal Dose 50%) is inversely proportional to toxicity: the LOWER the LD50 number in mg/kg, the MORE toxic the pesticide.

Official EPA Core Study Domain Pesticide Hazards And First Aid