Why wouldn't you choose granular if you were going to treat a tree or lettuce crop?

When considering the treatment of a tree or lettuce crop with granular pesticide formulations, one of the main concerns is the application efficiency and effectiveness. Granular applications often do not adhere well to the plants' leaves, which can result in insufficient coverage of the target area. This lack of adherence can lead to reduced absorption of the chemical by the pest or plant, diminishing the overall impact of the treatment.

Granular formulations are typically effective for targeting soil-dwelling pests or providing long-lasting control in the soil. However, when applied to vegetation, particularly to crops like lettuce or on tree leaves that have a more vertical or complex structure, the granules may simply fall off or wash away due to rain or irrigation, therefore not providing the intended protective effect.

In contrast, other application methods, like liquid spray formulations, allow for better distribution over the foliage. These methods enhance adherence and ensure that the pesticide can effectively reach the target pests. Thus, the choice to avoid granular products when treating such crops is driven by their limited ability to cling to plant surfaces and deliver a sufficient dose of the active ingredient where it is most needed.