What term describes how long a pesticide lasts?

• A. persistence
• B. resistant
• C. residue
• D. concentrated

Answer: (A)

Persistence describes how long a pesticide remains active after application. This term captures the duration of control the product provides and how long it continues to affect pests in the treated area. Persistence is influenced by how quickly the chemical breaks down under environmental conditions such as sunlight, heat, moisture, and microbial activity, as well as by the product’s formulation. A pesticide with high persistence stays active longer, which can mean fewer applications but may raise concerns about non-target effects and residues. By contrast, resistance refers to pests that survive exposure due to genetic traits, residue means what remains on surfaces after application, and concentrated describes how strong the formulation is, not how long it lasts.