Which of the following applies pesticides onto a device that wipes them onto weeds taller than crops?

The correct answer is the rope-wick/wiper treatment. This method is specifically designed to apply pesticides in a way that minimizes the contact with desirable plants, such as crops. The technique involves using a device that contains a wicking material soaked in herbicide. As it moves across the taller weeds, this wicking action allows the herbicide to transfer onto the weeds while avoiding direct application on the crops, effectively targeting unwanted vegetation without harming the desirable plants.

Other methods, such as crack-and-crevice applications, focus on confined spaces and are not suitable for treating taller weeds. Spot treatments are typically used for localized applications but do not utilize the wicking method for taller plants. Soil incorporation involves mixing the herbicide with the soil, which is not relevant to the direct targeting of weeds at above-ground levels. Thus, the rope-wick/wiper treatment is distinct due to its specific design and functionality for managing weeds efficiently.