How is a weed defined in agricultural terms?

In agricultural terms, a weed is defined as a plant that interferes with the growth of crops or ornamental plants. This definition encompasses a wide variety of plants that, while they may have their own ecological roles, are undesirable in agricultural settings due to their propensity to compete with cultivated plants for resources such as sunlight, nutrients, and water. Weeds can also harbor pests and diseases that may affect crop health, leading to reduced yields.

This concept is fundamental in agricultural management and pest control, as it guides practices aimed at mitigating the negative impacts of these intrusive species. Understanding that a weed is not limited by its characteristics, such as being ornamental or producing seeds alone, is crucial for effective weed management strategies.