Question

Observe the given figure and answer the given question.
a) Identify the disease and write its causal organism.
b) Write the characteristics of the disease shown in the figure.
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Answer 1

(a) The stem rust also known as black rust are caused by the fungus Puccinia graminis .

(b) characteristics of stem rust :-

Stem rust occurs primarily on stems but can also be found on leaves, sheaths, glumes, awns, and even seed. Symptoms begin as oval to elongate lesions that are generally reddish-brown in color. In the late stages of the disease, erumpent pustules produce numerous black sooty spores. Severe infestations with many stem lesions may weaken plant stems and result in lodging.