Why are translocated pesticides most effective?

Translocated pesticides are particularly effective because they are designed to be absorbed by the plant and distributed throughout its tissues. This systemic action means that when a pest consumes the plant material, it will ingest the pesticide that is present in various parts of the plant, not just where it was initially applied. This method is advantageous for targeting pests that may be feeding on different parts of the plant or those that are not easily accessed during application.

Effectiveness is enhanced because these pesticides can provide control over a broader range of pests, including those that might be sheltered within the plant, and they can act over an extended time as they continue to move throughout the plant's system. The capacity for systemic movement allows for a more thorough and lasting control strategy as opposed to contact pesticides, which may only affect pests that contact the chemical upon application.