What negative impact can result from overwatering plants?

Overwatering plants can lead to the development of certain diseases and infestations, which is a significant concern in plant care and management. When soil remains excessively moist, it creates an environment conducive to fungal growth and root rot, which can severely affect plant health. Furthermore, overwatering can attract pests, such as gnats and aphids, that thrive in wet conditions.

This negative impact is critical to understand because maintaining proper moisture levels is essential for the development of healthy plants. In contrast, stronger root systems and improved nutrition, as suggested in one of the choices, are outcomes typically associated with appropriate watering practices rather than overwatering. Additionally, improved drought resistance and the reduction of weedy species populations are not direct repercussions of excessive water; these scenarios are more likely to occur with proper irrigation and management rather than through overwatering.