Which method is used for applying pesticides directly to the bare ground?

The method used for applying pesticides directly to the bare ground is surface soil application. This technique involves spreading or spraying the pesticide onto the surface of the soil where it can effectively reach the target pests or plants. It's particularly beneficial for treating soil-borne pests or diseases, allowing for the active ingredients to penetrate into the soil where they can take action against unwanted organisms.

The surface soil application method is advantageous because it facilitates quick dispersal and absorption of the pesticide into the soil, minimizing potential losses due to environmental factors like evaporation or degradation. This method is often used in agricultural settings, landscapes, and gardens where direct soil treatment is necessary.

In contrast, the other options represent different application methods that are either not suited for direct soil application or target different surfaces. For example, a soil drench involves applying pesticides directly to the soil but typically entails saturating the soil around the base of plants rather than treating bare ground. Bark spray is used to target pests on the bark of trees. Wiper application pertains to applying pesticide to tall weeds or plants using a wiper or roller, not directly onto the soil.