Mammals become pests when they do what?

• A. Consume stored produce
• B. Eat live plants
• C. Pollinate crops
• D. Build nests in fields

Answer: (A)

Mammals become pests when they consume stored produce because the pest issue centers on postharvest losses and contamination in storage and handling. Animals like rodents will feed on grain, seeds, hay, and other stored crops, directly reducing the amount available and often contaminating it with droppings, urine, or debris. This creates economic losses for growers and can affect food safety and marketability, making stored-product consumption the classic pest behavior in agricultural settings.

Eating live plants happens while crops are growing, which is crop damage in the field but not the stored-produce scenario this item highlights. Pollinating crops is a beneficial activity, not a pest. Building nests in fields can cause nuisance or logistical problems, but it doesn't capture the primary economic impact of consuming stored produce.