What is an action threshold in pest management?

The concept of an action threshold in pest management is crucial for determining when to intervene in the case of pest infestations. This threshold represents the specific point at which the presence of pests has reached a level that justifies implementing control measures to prevent further damage to crops or plants.

In this context, choosing the action threshold at 80% of the economic injury level (EIL) is particularly effective because it ensures that management practices are conducted before the pest population reaches a point where significant economic damage occurs. The EIL is the population density at which the cost of pest damage equals the cost of managing the pest. By setting the action threshold at a percentage of the EIL, pest managers can address the problem proactively, minimizing potential losses while also being conscious of the costs associated with pest control measures.

This strategy supports integrated pest management (IPM) principles, which emphasize using a combination of strategies to manage pest populations rather than relying solely on pesticides. It balances economic considerations with environmental sustainability, aiming to minimize interventions while ensuring healthy crop yields.