Question

Aecidial stage of Puccinia develops on

• A. Upper surface of wheat leaves
• B. Lower surface of wheat leaves
• C. Upper leaf surface of barbery
• D. Lower leaf surface of barberry

Answer 1

The correct option is D Lower leaf surface of barberry

Puccnia appear on barberry plants in the spring, usually in the upper leaf surfaces. They are often in small clusters and exude pycniospores in a sticky honeydew. 5 to 10 days later, cup-shaped structures filled with orange-yellow, powdery aeciospores break through the lower leaf surface. The aecial cups are yellow and sometimes elongate to extend up to 5 mm from the leaf surface. Thus, the correct answer is option D.