Which of the following is an appropriate trigger to start a control program for rabbits?

• A. Rabbits first appear in the yard
• B. Damage exceeds the cost and time of controlling them
• C. When a seasonal peak is observed
• D. Only after neighbors consent

Answer: (B)

The main idea is to use an economic threshold to decide when to act. Start a rabbit control program when the damage caused by rabbits exceeds the cost and time of applying the control measures. This ensures you’re spending money only when the expected benefits (reduced damage) outweigh the costs, making the action financially sensible and efficient.

Seeing rabbits in the yard or waiting for a seasonal peak aren’t themselves good triggers. Merely noticing rabbits can happen before any real damage is done, so acting then could waste resources. Planning around a seasonal peak can help with timing, but it doesn’t justify starting control unless damage or risk has reached the threshold where control is cost-effective. Neighbors’ consent isn’t a trigger for implementing control decisions; actions should be driven by pest impact and cost-benefit considerations, not by others’ approval.

So, the best trigger is when the damage surpasses the cost and time of controlling them.