How does soil injection work?

How does soil injection work?

• A. It places pesticides dissolved or suspended in water into the soil within the root zone; the pesticide is then distributed via the tree's transport system to leaves and other living parts.
• B. It sprays pesticide onto the leaf surface for rapid absorption.
• C. It injects pesticide directly into the trunk only.
• D. It coats the soil surface with granules.

Answer: (A)

Soil injection works by placing the pesticide dissolved or suspended in water directly into the soil within the tree’s root zone. The roots take up the chemical, and it moves through the plant’s vascular system, primarily the xylem, with the transpiration stream from roots up to leaves and other tissues. This makes the pesticide systemic, providing protection throughout the tree rather than just where it was applied. This approach is different from spraying onto leaves, which is a foliar application and relies on leaf absorption; injecting into the trunk delivers the chemical directly into the trunk’s vascular system; and coating the soil surface with granules keeps the product on the soil surface and relies on movement through soil to reach roots.

Soil injection works by placing the pesticide dissolved or suspended in water directly into the soil within the tree’s root zone. The roots take up the chemical, and it moves through the plant’s vascular system, primarily the xylem, with the transpiration stream from roots up to leaves and other tissues. This makes the pesticide systemic, providing protection throughout the tree rather than just where it was applied.

This approach is different from spraying onto leaves, which is a foliar application and relies on leaf absorption; injecting into the trunk delivers the chemical directly into the trunk’s vascular system; and coating the soil surface with granules keeps the product on the soil surface and relies on movement through soil to reach roots.