What is “foliar application”?

Foliar application refers specifically to the method of applying pesticides directly onto the leaves of plants. This technique is often utilized because it allows for quick absorption of the active ingredients through the leaf surface, leading to efficient pest control or plant treatment. Leaves have a larger surface area exposed to the atmosphere, which can enhance the effectiveness of the pesticide by allowing it to penetrate the plant tissue where pests may be feeding.

Other methods mentioned, such as applying pesticides to the soil before planting or using irrigation systems, represent different approaches in pest management that do not involve targeting the leaves directly. Spraying pesticides during sunset, while a consideration for reducing evaporation and drift, does not define the application method itself. Therefore, the definition of foliar application is specifically highlighted through its direct interaction with plant foliage.