What does soil injection involve?

Soil injection involves placing pesticide below the surface of the soil, which allows for targeted application. This method is beneficial because it delivers the pesticide directly to the root zone of the target plants or pests, minimizing potential environmental impact and reducing exposure to non-target organisms. By applying the pesticide sub-surface, it also helps to protect the active ingredients from degradation by sunlight and rain, leading to more effective pest control. This technique is particularly useful for controlling soil-borne pests and diseases, ensuring that the chemicals are utilized most effectively.

The other options relate to different methods of pesticide application that do not involve inserting products into the soil. Pouring pesticide on the surface treats only the top layer, while spraying chemicals directly onto plant leaves focuses on direct contact with foliage rather than soil pests and problems. Applying fertilizer on the soil surface does not involve pesticides and is intended to enhance plant nutrition rather than control pests.