Main Plant Diseases – Old Year Questions

1. Which of the following statements is/are correct?
Viruses can infect
1. Bacteria
2. Fungi

3. Plants
Select the correct answer using the code given below:

(a) 1 and 2 only
(b) 3 only
(c) 1 and 3 only
(d) 1, 2 and 3

[I.A.S. (Pre) 2016]


2. Which one of the following in not correctly matched ?

(a) Wheat – Phalaris minor
(b) Potato – Late blight
(c) Bajra – Ergot
(d) Sugarcane – Powdery mildew

[U.P.P.C.S. (Mains) 2009]


3. Which one of the following is not correctly matched? Crop Disease

(a) Rice Green hair
(b) Bajra Ergot
(c) Pea Powdery mildew
(d) Gram Wilt

[U.P. Lower Sub. (Pre) 2015]


4. Which element deficiency causes chlorosis in maize plant?

(a) Nitrogen
(b) Zinc
(c) Copper
(d) Mangnese

[U.P. U.D.A./L.D.A. (Pre) 2006]


5. White tip of maize leaves indicates the deficiency of

(a) Fe
(b) Mn
(c) N
(d) Zn

[U.P.P.C.S. (Mains) 2010]


6. White Bud disease in plant is caused by deficiency of

(a) Zinc
(b) Copper
(c) Boron
(d) Manganese

[Jharkhand P.C.S. (Pre) 2016]


7. Pyrilla is pest of which crop?

(a) Wheat
(b) Rice
(c) Sugarcane
(d) Soyabean

[M.P. P.C.S. (Pre) 1990]


8. White rust is prominent fungal disease of –

(a) Wheat
(b) Mustard
(c) Rice
(d) Millet

[R.A.S./R.T.S. (Pre) 1996]


9. Two common fungal diseases of wheat are :

(a) Black rust & smut
(b) White rust & smut
(c) Smut & leaf curl
(d) Black rust & white rust

[R.A.S./R.T.S. (Pre) 1996]


10. Karnal Bunt is a disease of :

(a) Barley crop
(b) Wheat crop
(c) Bajra crop
(d) Jowar crop

[U.P. R.O./A.R.O. (Pre) 2016]


11. Tungro virus of rice is spread by –

(a) Borer
(b) Inflorescent Bug
(c) Golmiz
(d) Green leafhoppers

[U.P.P.C.S. (Mains) 2009]


12. Consider the following :
1. Birds
2. Dust blowing
3. Rain
4. Wind blowing
Which of the above spread plant diseases?

(a) 1 and 3 only
(b) 3 and 4 only
(c) 1, 2 and 4 only
(d) 1, 2 , 3 and 4

[I.A.S. (Pre) 2018]


13. What causes ‘Blackheart’ in potato ?

(a) Copper deficiency
(b) Boron deficiency
(c) Oxygen deficiency
(d) Potassium deficiency

[U.P.P.C.S. (Spl) (Pre) 2008]


14. Yellow vein mosaic disease in okra, caused by :

(a) Aphids
(b) Whitefly
(c) Leafhopper
(d) Fungi

[U.P.P.C.S. (Mains) 2002]


15. ‘Yellow Vein Mosaic’ is a serious disease of :

(a) Brinjal
(b) Okra
(c) Pea
(d) Cabbage

[U.P. P.C.S. (Mains) 2016]


16. ‘Spongy Tissue’ is a serious disorder hampering the export of mango variety. It is –

(a) Alphonso
(b) Dashehari
(c) Neelum
(d) Langra

[U.P.P.C.S. (Mains) 2002]