A plant disease is defined as any condition in a plant caused by what?

A plant disease is defined as any condition in a plant caused by living and non-living agents because this definition encompasses both biotic and abiotic factors that can affect plant health. Living agents include pathogens such as bacteria, fungi, viruses, and nematodes that actively infect and harm plants. Non-living agents refer to environmental factors such as toxins, nutrient deficiencies, or physical damage that can also lead to disease symptoms.

This comprehensive definition allows for a broader understanding of what can cause diseases in plants, highlighting the importance of recognizing both the biological and environmental stresses that plants may encounter. Identifying the type of agent responsible for a disease is crucial for effective management and treatment strategies in horticulture and agriculture.