What is the term for a plant problem caused by unfavorable growing conditions?

The term used to describe a plant problem resulting from unfavorable growing conditions is "disorder." Disorders typically arise due to environmental factors such as nutrient deficiencies, improper watering, poor soil conditions, or extreme weather conditions. These issues can affect the plant's health and growth without the involvement of infectious agents like pests or pathogens.

In contrast, disease specifically refers to issues caused by pathogens—such as fungi, bacteria, or viruses—that can infect plants. Pest infestations involve organisms like insects or other pests that harm the plant directly. Pathogens, as a broad category, include those agents that cause diseases but are distinct from the environmental conditions that lead to disorders. Thus, "disorder" is the most accurate choice for problems stemming from adverse growing conditions, as it encompasses the physiological and developmental issues that can occur when plants are not in their ideal environment.