Which symptom indicates a Rhizoctonia sp. infection?

Rhizoctonia species are known to cause a range of symptoms in infected plants, reflecting their role as significant plant pathogens. The correct answer encompasses all the symptoms listed: leaf spot, dieback, and wilting.

When a plant is infected by Rhizoctonia, it can exhibit leaf spots that might appear as dark, sunken lesions on the foliage. Furthermore, dieback can occur as the infection progresses, causing the tips of branches or stems to die, which can severely affect plant growth. Wilting is another critical indicator, often seen when the roots are compromised, leading to water uptake issues, thereby stressing the plant and causing it to droop.

Since Rhizoctonia can induce these diverse symptoms, having the answer that includes all of them reflects a comprehensive understanding of the pathogen's effects on plant health. This knowledge is essential for diagnostics and determining appropriate management strategies.