Which application method is directly associated with using irrigation systems for pesticide delivery?

The method associated with using irrigation systems for pesticide delivery is chemigation. Chemigation involves the application of pesticides through irrigation water, allowing for the simultaneous irrigation of crops and the application of chemicals. This method is efficient because it ensures that the pesticide is applied evenly across the field and can penetrate the soil more effectively, maximizing its contact with target pests and minimizing pesticide waste.

In contrast, bait applications involve the use of pesticide forms intended to attract and kill pests, but do not utilize irrigation systems. Granule applications involve solid pesticide formulations that are spread over the soil surface and require mechanical application methods rather than water delivery. Dust application typically means spreading a dry pesticide formulation as a dust, which also does not utilize irrigation systems. Each of these methods has unique advantages and is used for specific scenarios, but chemigation stands out as the approach that integrates directly with irrigation systems.