What is a primary concern regarding the use of chemical seed treatments?

Chemical seed treatments are primarily used to protect seeds from various pests and diseases before they germinate. However, a significant concern associated with these treatments is their potential to adversely affect beneficial organisms in the soil and surrounding environment. When chemicals are applied to seeds, some of these treatments can leach into the soil, impacting non-target organisms such as beneficial insects, earthworms, and microbiota that play crucial roles in maintaining soil health and ecosystem balance.

The reduction of beneficial organisms can lead to disruptions in nutrient cycling, soil structure, and pest management, ultimately affecting agricultural productivity and sustainability in the long run. This concern plays an instrumental role in discussions around integrated pest management and the importance of balancing plant protection with ecological health.

In terms of the other choices, while it's true that some seed treatments can enhance crop productivity, this is not a primary concern but rather a potential benefit. The notion of pest immunity is relevant, as pests may develop resistance to the chemicals, but it is not the most pressing issue directly linked to environmental impact and non-target organism effects. Finally, the statement regarding no long-term effects on the environment is misleading, as studies have shown various long-lasting impacts.