Environmental Impact & Regulations Flashcards

A pesticide spill occurs near a drainage ditch that flows to a lake. The applicator's FIRST priority should be:

Answer: Contain the spill immediately to prevent it from reaching the waterway

Immediate containment is the top priority to stop the pesticide from reaching water and causing aquatic harm and regulatory violations.

Organophosphate and carbamate pesticides primarily pose environmental concern because they:

Answer: Are highly toxic to birds and mammals through acetylcholinesterase inhibition

Both classes inhibit acetylcholinesterase, making them acutely toxic to vertebrates including birds and mammals at relatively low doses.

Which category of pesticide formulation generally poses the lowest inhalation risk during mixing and loading?

Answer: Granular (G) formulations

Granular formulations have minimal dust and vapor generation during handling, significantly reducing inhalation exposure compared to powders or liquid concentrates.

The 're-entry interval' (REI) listed on a pesticide label is defined as the minimum time that must pass after application before:

Answer: Workers may enter the treated area without required personal protective equipment

The REI specifies the minimum time workers must stay out of treated areas to avoid harmful exposure to pesticide residues.

Which type of pesticide application method typically results in the greatest off-target drift and potential environmental contamination?

Answer: Aerial application by fixed-wing aircraft at low altitudes

Aerial applications, especially at higher altitudes or in unfavorable wind conditions, produce significant spray drift compared to ground-based or subsurface methods.

State lead agencies (SLAs) can enforce pesticide regulations that are STRICTER than federal FIFRA requirements. This is known as:

Answer: State primacy or 'more restrictive' state authority

FIFRA sets a federal floor but allows states to enact more restrictive pesticide regulations through their own authority, often called state primacy.

Which best describes the purpose of a pesticide 'mode of action' classification system (e.g., IRAC numbering)?

Answer: To help applicators rotate between chemically distinct pesticide groups to manage resistance

The IRAC mode of action system groups pesticides by their biochemical target site, enabling applicators to rotate groups and slow resistance development.