Fungi,Viruses and Bacterial Plant Diseases

Q. Which part of the tobacco plant is infected by Meloidogyne incognita?

1. Flower
2. Leaf
3. Stem
4. Root

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. 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. 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

Q.

Which one of the following is not a fungal disease?

1. Rust of wheat

2. Smut of bajra

3. Black rot of crucifers

4. Red rot of sugarcane

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. 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 the diseases in plants with the causative organisms.

1. Virus
2. Bacteria
3. Rust
4. Rot
5. Mosaic
6. Fungi