What is a notable disadvantage of using overhead sprinklers for irrigation?

The notable disadvantage of using overhead sprinklers for irrigation is that they can lead to a potential spread of disease due to wet foliage. When water is sprayed directly onto the leaves of plants, it can create a humid environment that is conducive to the growth and spread of various plant diseases. Many pathogens thrive in moist conditions, and when foliage remains wet for extended periods, the risk of fungal infections and other diseases increases significantly. This situation is particularly critical in densely planted areas where air circulation might be limited, allowing moisture to linger on the leaves for longer periods.

In contrast, while costly installation, complicated setup, and limited coverage area can be considerations in choosing irrigation methods, they do not directly impact the health of the plants in the same way that increased moisture on foliage can. Thus, the potential for disease transmission linked to wet leaves is a key reason why this method of irrigation may be seen as a disadvantage.