Weather-wise applications can help you save money by saving the pesticide lost through ___________ and ___________.

Weather-wise applications are crucial for ensuring the effective use of pesticides while minimizing waste and unnecessary expenses. The correct choice focuses on the concepts of drift and run-off.

Drift refers to the unintentional movement of pesticide droplets away from the target area, often caused by wind or air currents during application. When pesticides drift, they can end up in non-target areas, which not only wastes product but may also lead to environmental concerns, such as affecting surrounding wildlife or crops.

Run-off involves the movement of pesticide from the application area to surrounding areas via water flow, particularly after rain or when irrigation occurs. This can occur if the pesticide is applied to surfaces that are not properly prepared or if it rains soon after application. Like drift, run-off results in the loss of the product and can also lead to contamination of water sources.

By timing applications to optimal weather conditions, applicators can reduce the risk of drift and run-off. This practice ultimately leads to more efficient use of pesticides, reducing costs and improving the effectiveness of pest control efforts. Other options, while presenting different concepts, do not specifically relate to the immediate concerns of cost-saving in pesticide application regarding loss through atmospheric and environmental effects.