What is the purpose of foliar application in pest control?

The purpose of foliar application in pest control is to address pests that are present on the leaves and stems of plants. This method involves applying insecticides or fungicides directly to the foliage, where many pests feed and reproduce. By targeting the leaves and stems, which are crucial areas for pest infestation, the application can effectively control and reduce pest populations before they cause significant damage to the plant.

In contrast, targeting the roots of plants or managing soil pests directly would require different methods of application, such as drenching the soil or using systemic pesticides that are absorbed by the root system. Additionally, enhancing the growth of beneficial plants involves practices unrelated to pest control applications and typically focuses on improving soil health or choosing the right plant species. Thus, the primary goal of foliar application is to protect the most visibly affected parts of the plant from pests that threaten their health and productivity.