Plant Diseases

Q.

Name any two animal diseases and two plant diseases caused by micro-organisms.

Q.

What is a citrus canker?

Q.

Name one plant disease each caused :(a) by fungi (b) by virus (c) by bacteria.

Q.

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

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

Q.

What is the causative agent of the following diseases?

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

Q.

Write about the Tobacco Mosaic Disease.

Q. Foot and mouth disease of cattle is caused by a:

1. Bacterium
2. Fungus
3. Protozoan
4. Virus

Q. Match the plant diseases with the type of microrganisms that causes it.

$$\begin{array}{cc}\text{Column 1}& \text{Column 2}\\ \text{a. Citrus canker}& \text{i. Fungi}\\ \text{b. Rust of wheat}& \text{ii. Bacteria}\\ \text{c. Yellow vein mosaic}& \text{iii. Virus}\end{array}$$

1. a ­iii, b ­ii, c ­iv, ­i

2. a­ iv, b­ i, c ­ii, d­ iii

3. a ­i, b­ iv, c ­iii, d­ ii

4. a ­ii, b ­iii, c­ i, d­ iv

Q. Anthrax is a .......... disease.

1. Fungal
2. Bacterial
3. All of the above
4. Viral

Q. Name the nematode that infests and damages tobacco roots. How are transgenic tobacco plants produced to solve this problem

Q. Match the following. [3 marks]

$\begin{array}{cccc}& \text{Column I}& & \text{Column II}\\ \text{A.}& \text{Citrus Canker}& i& \text{Tobacco mosaic virus}\\ \text{B.}& \text{Smut disease of rice}& ii& \text{Xanthomonas axonopodis}\\ \text{C.}& \text{Tobacco mosaic}& iii& \text{Ustilaginoidea virens}\end{array}$

Q. Sickle cell anemia is a non-infectious disease.

1. True
2. False

Q. Mark the correct statement

1. Microbes spoil leather
2. Microbes spoil clothing
3. Microbes spoil food
4. All of theses

Q. Mosaic of tobacco is caused by

1. Fungus
2. Virus
3. All of the above
4. Bacteria

Q.

Disease caused by defective canning

Q. Citrus canker is caused by ____________.

1. Bacteria
2. Fungi
3. Protozoa
4. Virus

Q. Which of the following pairs of microorganisms and diseases is wrongly matched?

1. Bacteria - Malaria
2. Fungus - Athlete's foot
3. Protozoa - Sleeping sickness
4. Virus - Tobacco mosaic disease

Q. Match the following.

$\begin{array}{cccc}& \text{Column I}& & \text{Column II}\\ \text{A.}& \text{Citrus Canker}& i& \text{Yellow mosaic virus}\\ \text{B.}& \text{Wheat rust}& ii& \text{Xanthomonas axonopodis}\\ \text{C.}& \text{Yellow vein mosaic}& iii& \text{Puccinia}\text{rust fungus}\end{array}$

Q.

Which is the mode of transmission for the plant disease called citrus canker?

1. Air

2. Water

3. Soil

4. Seed

Q. is a disease caused in citrus plants by Xanthomonas axonopodis.

1. Citrus black spot
2. Citrus canker
3. Citrus cancer

Q. Match the following.

$\begin{array}{cccc}& \text{Column I}& & \text{Column II}\\ \text{A.}& \text{Citrus Canker}& i& \text{Yellow mosaic virus}\\ \text{B.}& \text{Wheat rust}& ii& \text{Xanthomonas axonopodis}\\ \text{C.}& \text{Yellow vein mosaic}& iii& \text{Puccinia}\text{rust fungus}\end{array}$

Q. Which of the following disease is caused by a fungus?

1. Tuberculosis
2. Small pox
3. Black rust of wheat
4. Cancer