Question

Red rot of sugarcane and white rust of radish respectively are caused by

• A. Albugo candida and Cercospora
• B. Colletotrichum and Fusarium
• C. Pythium and Phytophthora
• D. Albugo candida and Puccinia graminis
• E. Colletotrichum and Albugo candida

Answer 1

Answer: (E)

Red rot of sugarcane is a severe disease traced in sugarcane. It is caused by Colletotrichum falcatum. The mycelium of the fungus infects the parenchymatous cells of the host tissue. The pathogen enters through the nodes at the leaf scars, through any kind of wound, through root primordia and seed-cuttings. It produces conidia which grow into mycelium and infects the host.

White rust is a disease caused by Albugo candida. Chlorosis on leaf surfaces, white blister-like growths on the underside of leaves and on the stems of the plant, and swelling of the roots are some common symptoms. It enters the host by producing the germ tube which will penetrate and infect the host through a stoma or the sporangia releases zoospores which travel through films of water.

So, the correct answer is option E.