Fungi,Viruses and Bacterial Plant Diseases

Q. Match the given diseases with their respective causative agents.
$\begin{array}{cccc}& Disease& & Pathogen\\ 1& Brownrustofwheat& a& Fungus\\ 2& Lateblightofpotato& b& Bacteria\\ 3& Blackrotofcrucifers& c& Virus\\ 4& Turnipmosaic& & \end{array}$

1. 1 - a, 2 - a, 3 - b, 4 - c
2. 1 - a, 2 - c, 3 - b, 4 - c
3. 1 - b, 2 - a, 3 - b, 4 - c
4. 1 - b, 2 - a, 3 - c, 4 - b

Q. The mung bean variety developed through induced mutations, possesses resistance to which disease(s)?

1. Yellow mosaic virus
2. Powdery mildew
3. Both A & B
4. Black rot

Q. Plant variety Himgiri is resistant to which disease?

Q. Match the crop with disease against which it has acquired resistance
$\begin{array}{cccc}& Crop& & Resistancetodiseases\\ a& Wheat& i& Bacterialblight\\ b& Brassica& ii& Leafandstriperust\\ c& Cauliflower& iii& Blackrot\\ d& Cowpea& iv& Whiterust\\ e& Chilli& v& Chillymosaicvirus,Tobaccomosaicvirus,Leafcurl\end{array}$

1. a - ii, b - iv, c - iii, d - i, e - v
2. a - ii, b - iii, c - iv, d - i, e - v
3. a - iv, b - ii, c - iii, d - i, e - v
4. a - ii, b - iv, c - iii, d - v, e - i

Q. Match column I with column II and select the correct option.

Column I	Column II
A	Black rot	1	Wheat
B	Brown rust	2	Sugarcane
C	Red rot	3	Crucifers

Q. Pathogens that affect the yield of crops are

1. Bacteria and protozoans
2. Roundworms and methanogens
3. Fungi, viruses and bacteria
4. Euglenoids and insects