A diseased wheat plant shows brown pustules on the stalk, leaves and leaf sheath. Select the correct option for the mode of transmission and causal organism of this disease.

Mode of Transmission Causal Organisms

(i) Air and Seeds Puccinia graminis

(ii) Insects Yellow vein mosaic virus

(iii) Soil Tobacco mosaic virus

(iv) Air Xanthomonas citri

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Solution

Stem rust is caused by the fungus Puccinia graminis, which causes significant disease in cereal crops. Wheat leaf rust spreads via airborne spores and by the seedling by being carried over with the seed grain.

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Similar questions

What is the causative agent of the following diseases?

(a) Rust of wheat (b) Citrus canker (c) Yellow vein mosaic of bhindi (Okra)

Name the causative micro-organisms of the following plant diseases :

(a) Rust of wheat (b) Citrus canker (c) Yellow vein mosaic of bhindi (Okra)

State the causative micro-organisms and modes of transmission of the following human diseases.

Polio, cholera, hepatitis B.

Q. Identify the disease and its causal organism on the basis of given information and select the correct option.

	Diseases	Causal organisms
(i)	Yellow vein mosaic	Yellow vein mosaic virus
(ii)	Tobacco mosaic	Tobacco mosaic virus
(iii)	Rust of wheat	Puccinia graminis
(iv)	Citrus canker	Xanthomonas citri

Match these microorganisms with the plants they affect.

$\begin{matrix} Column I & Column II a. Puccinia hordei & i. Okra b.Yellow vein mosaic virus & ii. Oranges c. Xanthomonas axonopodis & iii. Barley d. Yellow rust & iv. Wheat \end{matrix}$

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	Mode of Transmission	Causal Organisms
(i)	Air and Seeds	Puccinia graminis
(ii)	Insects	Yellow vein mosaic virus
(iii)	Soil	Tobacco mosaic virus
(iv)	Air	Xanthomonas citri