Plant symptoms may be the result of multiple causes.

• A. True
• B. False
• C. Not sure
• D. Cannot determine.

Answer: (A)

Plant symptoms are not tied to a single cause. The same visual signs—yellowing, wilting, spotting, stunted growth—can stem from a range of factors, including pathogens ( fungi, bacteria, viruses ), pest damage, and environmental or cultural stresses ( drought, nutrient deficiency or toxicity, salinity, herbicide injury, improper watering, or soil compaction ). For instance, leaf yellowing might indicate iron deficiency in the soil, root problems from overwatering, or a viral infection, while spots could come from fungal disease, bacterial blight, or sunburn. Because multiple factors can produce similar symptoms, you must look at the whole context: the plant’s growing conditions, history, other symptoms across the plant, and, if needed, tests of soil nutrients, moisture, or lab tests for pathogens. Sometimes more than one factor is involved at once, creating a disease complex or synergistic stress. That broad possibility is why the statement is true.