Which category does nutrient toxicity fall into?

Which category does nutrient toxicity fall into?

• A. Living disease agent
• B. Nonliving disease agent
• C. Pathogen
• D. Beneficial microbe

Answer: (B)

Understanding how disease factors are categorized: some are living organisms that reproduce and invade, while others are nonliving chemical or physical agents. Nutrient toxicity is a chemical condition caused by excess nutrients or salts in the plant’s environment, which stresses tissues and causes symptoms, but no organism is present. So it falls under nonliving disease agents. Living disease agents include organisms like bacteria, fungi, and viruses that can cause disease, which is why a pathogen (a living disease-causing organism) doesn’t apply here. A beneficial microbe helps the plant and does not cause disease, so that choice isn’t correct either.

Understanding how disease factors are categorized: some are living organisms that reproduce and invade, while others are nonliving chemical or physical agents. Nutrient toxicity is a chemical condition caused by excess nutrients or salts in the plant’s environment, which stresses tissues and causes symptoms, but no organism is present. So it falls under nonliving disease agents. Living disease agents include organisms like bacteria, fungi, and viruses that can cause disease, which is why a pathogen (a living disease-causing organism) doesn’t apply here. A beneficial microbe helps the plant and does not cause disease, so that choice isn’t correct either.