Which statement describes factors influencing development of resistance?

Which statement describes factors influencing development of resistance?

• A. The color of the pesticide label
• B. The frequency of resistance in the pest population before you use the pesticides in question
• C. The weather
• D. The size of the field

Answer: (B)

Development of resistance in pests is driven by genetics and the selection pressure from repeated pesticide use. The most influential factor is how common resistant individuals are in the pest population before you apply the pesticide. If there’s already a sizable portion carrying resistance traits, applying the pesticide quickly selects those survivors and the resistant group grows, making the pesticide less effective over time. If resistance is rare at the start, it can be slowed by rotating chemicals with different modes of action and using integrated pest management strategies. The color of the label is cosmetic and doesn’t affect resistance. Weather can affect pest activity and exposure to the pesticide but doesn’t change the underlying genetics that drive resistance. Field size affects how many pests you encounter and how much product you need, but it doesn’t directly influence the development of resistance.

Development of resistance in pests is driven by genetics and the selection pressure from repeated pesticide use. The most influential factor is how common resistant individuals are in the pest population before you apply the pesticide. If there’s already a sizable portion carrying resistance traits, applying the pesticide quickly selects those survivors and the resistant group grows, making the pesticide less effective over time. If resistance is rare at the start, it can be slowed by rotating chemicals with different modes of action and using integrated pest management strategies.

The color of the label is cosmetic and doesn’t affect resistance. Weather can affect pest activity and exposure to the pesticide but doesn’t change the underlying genetics that drive resistance. Field size affects how many pests you encounter and how much product you need, but it doesn’t directly influence the development of resistance.