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Bacterial Diseases of Crops

Description: Bacterial pathogens diseases of sugarcane cotton citrus crucifers pea peanut mango Bacteria and Viruses and Their Control Measures
Number of Questions: 18
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Tags: Bacterial pathogens diseases of sugarcane cotton citrus crucifers pea peanut mango Bacteria and Viruses and Their Control Measures
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The causative bacterial agent for ‘Blister spot’ disease of apples is _______________________.

  1. Erwinia amylovora

  2. Pseudomonas syringae

  3. Agrobacterium rhizogenes

  4. Agrobacterium tumefaciens

  5. Both 1 and 3

Show answer
Correct Option: B
Explanation:

Blister spot of apple is caused by the bacteria Pseudomonas syringae.

The causing bacterial agent(s) of ‘Lint degradation’ in cotton is/are P. Erwinia herbicola Q. Pantoea agglomerans R. Pseudomonas fluorescens S. Agrobacterium tumefaciens

  1. Only P

  2. P and Q

  3. R and S

  4. P, Q, R

  5. Only S

Show answer
Correct Option: D
Explanation:

The causing agents for lint degradation of cotton are- Erwinia herbicola, Pantoea agglomerans, Pseudomonas fluorescens. Agrobacterium tumefaciens causes crown gall disease in cotton.

Which of the following diseases of crucifer crops is/are assoaciated with the infection of Xanthomonas campestris?

  1. Mac leaf spot

  2. Rap leaf spot

  3. Soft rot

  4. Crown gall

  5. Black rot

Show answer
Correct Option: E
Explanation:

The causing bacteria for black rot is Xanthomonas campestris.

Which of the following statements is/are false? A. Xanthomonas campestris causes leaf blight in carrot. B. The causative agent for bud rot disease of coconut is Erwinia spp. C. Happy disease of grapes is caused by Agrobacterium tumefaciens.

  1. A only

  2. B only

  3. C only

  4. A and B only

  5. B and C only

Show answer
Correct Option: E
Explanation:

A. Leaf blight of carrot is caused by the bacteria Xanthomonas campestris. B. Bud rot disease of coconut is caused by the bacteria Erwinia spp. C. Happy disease is caused by Xylophilus ampelinus in grapes. Agrobacterium tumefaciens causes crown gall disease in grapes. Hence, the statements B and C both are false.

Which among the following diseases is/are caused by Pseudomonas syringae, in cvitrus? P. Blast Q. Black pit
R. Canker

  1. Only P

  2. Only Q

  3. Only R

  4. P and Q

  5. Q and R

Show answer
Correct Option: D
Explanation:

Pseudomonas syringae causes black pit and blast diseases in citrus. Canker is caused by Xanthomonas axonopodis in citrus.

The causative bacterial agent(s) of Pierce's disease in grapes is /are P. Xylella fastidiosa Q. Xylophilus ampelinus R. Agrobacterium tumefaciens

  1. Only P

  2. Only Q

  3. Only R

  4. P and Q

  5. Q and R

Show answer
Correct Option: A
Explanation:

In grapes, the Pierce's disease is caused by the bacterial agent Xylella fastidiosa. Happy disease is caused by Xylophilus ampelinus in grapes. Agrobacterium tumefaciens causes crown gall disease in grapes. Hence, only P causes Pierce’s disease in grapes.

The causative bacterial pathogen associated with ‘Pith necrosis’ of tomato is _________________.

  1. Xanthomonas campestris

  2. Erwinia carotovora

  3. Ralstonia solanacearum

  4. Pseudomonas corrugate

  5. Clavibacter michiganen

Show answer
Correct Option: D
Explanation:

In tomato, the causative bacterial agent is Pseudomonas corrugate that is responsible for pith necrosis disease.

Match the Group-I with Group-II ||| |---|---| |Group-I (Plant diseases) | Group-II (Causing bacteria)| |P. Grey spot of apricot|1. Pseudomonas amygdali | |Q. Stripe of cacao|2. Xanthomonas arboricola| |R. Scab of carrot|3. Streptomyces sp.| |S. Angular leaf spot of cucurbits|4. Erwinia caratovora|

  1. P - 1, Q - 3, R - 4, S - 2

  2. P - 2, Q - 3, R - 4, S - 1

  3. P - 3, Q - 4, R - 1, S - 2

  4. P - 2, Q - 4, R - 3, S - 1

  5. P - 2, Q - 3, R - 1, S - 4

Show answer
Correct Option: D
Explanation:

Grey spot of apricot is caused by the bacteria Xanthomonas arboricola. Stripe disease of cacao is caused by Erwinia caratovora. Streptomyces sp. (S. scabiei) causes scab in carrot. Citrus’s black fruit pit is caused by Pseudomonas syringae. Pseudomonas amygdali causes angular leaf spot disease in cucurbits. Hence, the correct answer using the codes is P - 2, Q - 4, R - 3, S - 1.

Match the Column-I with Column-II and select the correct answer using the codes given below. ||| |---|---| |Column-I |Column-II| |P. Pink seed of wheat|1. Rhodococcus fascians| |Q. Leaf gall of tobacco|2. Xanthomonas oryzae| |R. Gumming of sugarcane|3. Glomerella cingulata| |S. Blight of rice|4. Xanthomonas axonopodis| | |5. Erwinia rhapontici|

  1. P - 3, Q - 1, R - 5, S - 2

  2. P - 5, Q - 1, R - 4, S - 2

  3. P - 3, Q - 4, R - 5, S - 2

  4. P - 2, Q - 3, R - 4, S - 1

  5. P - 1, Q - 4, R - 5, S - 3

Show answer
Correct Option: B
Explanation:

Pink seed of wheat is caused by the bacteria Erwinia rhapontici. Leaf gall in tobacco is caused by the bacteria Rhodococcus fascians. Xanthomonas axonopodis causes gumming disease in sugarcane. Blight disease of rice is caused by the bacteria Xanthomonas oryzae. Hence, the correct sequence of codes is P - 5, Q - 1, R - 4, S - 2.

The causing bacterial pathogen(s) for ‘Sheath brown rot’ in rice is/are A. Pseudomonas fuscovaginae B. Xanthomonas oryzae C. Burkholderia glumae D. Erwinia chrysanthemi

  1. A only

  2. B only

  3. A and B

  4. B and C

  5. C and D

Show answer
Correct Option: A
Explanation:

In rice, the causative bacteria for sheath brown rot is Pseudomonas fuscovaginae. Xanthomonas oryzae causes leaf streak and blight diseases in rice. Grain rot disease is associated with the bacteria Burkholderia glumae in rice. Foot rot of rice is caused by the bacteria Erwinia chrysanthemi. Hence, A is the only causative bacterial agent responsible for sheath brown rot in rice.

Which of the following statement(s) is/are false? P. Crown gall of mango is caused by Agrobacterium tumefaciens. Q. Erwinia carotovora causes fruit rot disease in tomato. R. Striatura ulcerosa disease in hemp is caused by Pseudomonas cannabina.

  1. P only

  2. Q only

  3. R only

  4. P, Q

  5. Q, R

Show answer
Correct Option: C
Explanation:

P. The causative bacterial agent for crown gall in mango is Agrobacterium tumefaciens. Q. Fruit rot disease of tomato is caused by the bacteria Erwinia carotovora. R. The causative agent for Striatura ulcerosa in hemp is Pseudomonas amygdali. Pseudomonas cannabina causes blast disease in hemp. Hence, only R is the false statement.

Match the diseases in Column-I with causing pathogens in Column-II and select the correct answer using the codes given below. ||| |---|---| |Column-I |Column-II| |P. Wilt of potato|1. Ralstonia solanacearum| |Q. Fruitlet brown rot of pineapple|2. Pseudomonas syringae| |R. Blossom blast of pear|3. Pseudomonas solanacearum| |S. Wilt of peanut|4. Erwinia spp.| | |5. Polyscytalum pustulans|

  1. P - 1, Q - 4, R - 2, S - 3

  2. P - 2, Q - 4, R - 1, S - 5

  3. P - 4, Q - 1, R - 2, S - 3

  4. P - 1, Q - 4, R - 5, S - 2

  5. P - 5, Q - 4, R - 2, S - 3

Show answer
Correct Option: A
Explanation:

In potato, wilt disease is caused by the bacteria Ralstonia solanacearum. Erwinia ananas causes fruitlet brown rot in pineapple. Blossom blast is caused by the bacteria Pseudomonas syringae in pear. Wilt disease of peanut is caused by Pseudomonas solanacearum. Hence, the correct answer using the codes is P - 1, Q - 4, R - 2, S - 3.

The causing bacterial pathogen(s) for ‘Marbled fruit’ disease in pineapple is/are A. Erwinia carotovora B. Erwinia herbicola C. Acetobacter peroxydans

  1. A only

  2. B only

  3. C only

  4. A and B

  5. B and C

Show answer
Correct Option: E
Explanation:

Erwinia carotovora causes soft rot disease in pineapple. The causing bacterial pathogens responsible for marbled fruit disease of pineapple are Acetobacter peroxydans and Erwinia herbicola. Hence, the correct answer is Elsinoe ampelina and Sphaceloma ampelinum.

The causing bacteria associated with ‘Purple stain’ disease of papaya is ___________________.

  1. Pseudomonas solanacearum

  2. Erwinia cypripedii

  3. Erwinia herbicola

  4. Pseudomonas maribos

  5. Pseudomonas caricapapayae

Show answer
Correct Option: C
Explanation:

Purple stain disease of papaya is caused by the bacteria Erwinia herbicola.

Identify the true statement (s). P. Phony disease of peach is caused by the bacteria Xanthomonas arboricola. Q. Brown spot and blight diseases in pea are caused by Pseudomonas syringae. R. Erwinia carotovora causes soft rot disease in pineapple.

  1. Only P

  2. Only Q

  3. Only R

  4. P and Q

  5. Q and R

Show answer
Correct Option: E
Explanation:

P. The causative bacterial pathogen for phony disease of peach is Xylella fastidiosa. Yellow spot disease is caused by the bacteria Xanthomonas arboricola in peach. Q. Pseudomonas syringae causes brown spot and blight diseases in pea.
R. Soft rot disease of pineapple is caused by the bacteria Erwinia carotovora. Hence, both statements. Q and R, are true.

Match the disease in List-A with causing bacterial pathogens in List-B and select the correct answer using the codes given below ||| |---|---| |List-A |List-B| |A. Mottled stripe of sugarcane|1. Corynebacterium sepedonicum| |B. Hollow stalk in tobacco|2. Herbaspirillum rubrisubalbicans| |C. Basal glume rot of wheat|3. Pseudomonas syringae| |D. Ring rot of potato|4. Erwinia spp.|

  1. A - 2, B - 4, C - 3, D - 1

  2. A - 3, B - 1, C - 4, D - 2

  3. A - 2, B - 4, C - 1, D - 3

  4. A - 4, B - 3, C - 2, D - 1

  5. A - 2, B - 1, C - 3, D - 4

Show answer
Correct Option: A
Explanation:

Mottled stripe disease of sugarcane is caused by the bacteria Herbaspirillum rubrisubalbicans. Erwinia spp. causes hollow stalk disease in tobacco. Basal glume rot of wheat is caused by the bacteria Pseudomonas syringae. Ring rot of potato is caused by the bacteria Corynebacterium sepedonicum. Hence, the sequence of codes A - 2, B - 4, C - 3, D - 1 is correct.

Select the correct match including Group-I and Group-II. ||| |---|---| |Group-I |Group-II| |P. Wildfire of soybean |1. Pseudomonas solanacearum| |Q. Wilt of sunflower|2. Xanthomonas campestris| |R. Angular leaf spot of strawberry|3. Pseudomonas syringae| |S. Black chaff of oat|4. Xanthomonas fragariae|

  1. P - 1, Q - 3, R - 4, S - 2

  2. P - 2, Q - 3, R - 4, S - 1

  3. P - 3, Q - 4, R - 1, S - 2

  4. P - 3, Q - 1, R - 4, S - 2

  5. P - 4, Q - 3, R - 1, S - 1

Show answer
Correct Option: D
Explanation:

Wildfire of soybean is caused by the bacteria, Pseudomonas syringae. Wilt disease of sunflower is caused by the bacteria Pseudomonas solanacearum. The causing bacteria for angular leaf spot of strawberry is Xanthomonas fragariae. Black chaff disease of oat is caused by Xanthomonas campestris. Hence, the correct answer using the codes is P - 3, Q - 1, R - 4, S - 2.

Match the bacterial diseases in Group-I with causative pathogens in Group-II ||| |---|---| |Group- I |Group-II| |P. Mosaic of wheat|1. Ralstonia solanacearum| |Q. Graville wilt of tobacco |2. Pseudomonas fluorescens | |R. Leaf scald of sugarcane|3. Clavibacter michiganensis| |S. Pink eye of potato|4. Drechslera teres| | |5. Xanthomonas albilineans|

  1. P - 3, Q - 1, R - 5, S - 2

  2. P - 5, Q - 1, R - 4, S - 2

  3. P - 3, Q - 4, R - 5, S - 2

  4. P - 2, Q - 3, R - 4, S - 1

  5. P - 1, Q - 4, R - 5, S - 3

Show answer
Correct Option: A
Explanation:

Mosaic disease of wheat is caused by the bacteria Clavibacter michiganensis. The causative bacteria for graville wilt in tobacco is Ralstonia solanacearum. Leaf scald disease of sugarcane is caused by the bacteria Xanthomonas albilineans. Pink eye disease of potato is caused by the bacteria Pseudomonas fluorescens. Hence, the correct sequence of codes is P - 3, Q - 1, R - 5, S - 2.

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