What term describes a small, typically multicelled organism that can cause plant diseases such as rust, smuts, mildews, wilts, and leaf spots?

What term describes a small, typically multicelled organism that can cause plant diseases such as rust, smuts, mildews, wilts, and leaf spots?

• A. Fungus
• B. Bacteria
• C. Virus
• D. Algae

Answer: (A)

Fungi are the organisms most commonly responsible for rusts, smuts, mildews, wilts, and leaf spots. They are typically multicelled and spread through spores, growing on or in plant tissue to cause the listed diseases. That combination of disease types is classically fungal, which is why this term fits best. Bacteria can cause plant problems but not these classic rusts and smuts; viruses produce different symptoms like mosaics or leaf curling; algae aren’t the usual culprits for these turf diseases. So, fungus is the best choice.

Fungi are the organisms most commonly responsible for rusts, smuts, mildews, wilts, and leaf spots. They are typically multicelled and spread through spores, growing on or in plant tissue to cause the listed diseases. That combination of disease types is classically fungal, which is why this term fits best. Bacteria can cause plant problems but not these classic rusts and smuts; viruses produce different symptoms like mosaics or leaf curling; algae aren’t the usual culprits for these turf diseases. So, fungus is the best choice.