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Important Diseases of Plants (GATE - XL)

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Questions

Question 1 Multiple Choice (Single Answer)

Which of the following a bacterial disease of peas?

  1. Brown spot
  2. Black leaf
  3. Gray mold
  4. Powdery mildew
  5. Wilt
Question 2 Multiple Choice (Single Answer)

_______ is not caused by a fungus.

  1. Gumming disease
  2. Black stripe
  3. Pineapple disease
  4. Rind disease
  5. Black rot
Question 3 Multiple Choice (Single Answer)

_________ is caused by a virus.

  1. False eyespot of wheat
  2. Wheat yellow leaf
  3. Pink seed of wheat
  4. Downy mildew of wheat
  5. Ergot of wheat
Question 4 Multiple Choice (Single Answer)

White mold of pepper is caused by

  1. Botrytis cinerea
  2. Sclerotinia sclerotiorum
  3. Peronospora tabacina
  4. Stemphylium solani
  5. Macrophomina phaseolina
Question 5 Multiple Choice (Single Answer)

Northern corn leaf blight is caused by

  1. Puccinia sorghi
  2. Bipolaris maydis
  3. Exserohilum turcicum
  4. Puccinia polysora
  5. Cercospora zeae-maydis
Question 6 Multiple Choice (Single Answer)

Identify the mismatched pair of disease and its causative agent.

  1. Black root rot of cotton: Thielaviopsis basicola
  2. Black rot of crucifers: Xanthomonas campestris
  3. Gray mold of hemp: Agrobacterium tumefaciens
  4. Downy mildew of mustard: Peronospora parasitica
  5. Bottom rot of lettuce: Rhizoctonia solani
Question 7 Multiple Choice (Single Answer)

_______ is caused by a bacterium.

  1. Corn smut
  2. Citrus canker
  3. Wheat leaf rust
  4. Red rot of sugarcane
  5. Potato late blight
Question 8 Multiple Choice (Single Answer)

Which of the following matchings is not correct?

  1. Coffee leaf rust: Hemileia vastatrix
  2. Ergot of rye: Claviceps purpurea
  3. Early blight of potato: Phytophthora infestans
  4. Crown rust of oats: Puccinia coronata
  5. Halo blight of beans: Pseudomonas syringae
Question 9 Multiple Choice (Single Answer)

Wildfire of tobacco is caused by

  1. Agrobacterium rhizogenes
  2. Erwinia carotovora
  3. Pseudomonas syringae
  4. Ralstonia solanacearum
  5. Rhodococcus fascians
Question 10 Multiple Choice (Single Answer)

Which of the following plant diseases are caused by fungi?

P. Black rot of crucifers
Q. Downy mildew of rice
R. Fire blight of pome fruits
S. Red rot of sugarcane

  1. P and Q
  2. P and R
  3. Q and R
  4. Q and S
  5. R and S
Question 11 Multiple Choice (Single Answer)

Powdery mildew of cucurbits is caused by

P. Erysiphe cichoracearum
Q. Blumeria graminis
R. Sphaerotheca fuliginea
S. Erysiphe necator

  1. P and Q
  2. P and R
  3. P and S
  4. Q and R
  5. R and S
Question 12 Multiple Choice (Single Answer)

Which of the following are used as biocontrol agents?

P. Agrobacterium radiobacter
Q. Pythium insidiosum
R. Sclerotinia sclerotiorum
S. Trichoderma harzianum

  1. P and Q
  2. P and S
  3. Q and R
  4. Q and S
  5. R and S
Question 13 Multiple Choice (Single Answer)

Asian soyabean rust is caused by

P. Phakopsora pachyrhizi
Q. Phakopsora meibomiae
R. Puccinia purpurea
S. Puccinia graminis

  1. P and Q
  2. P and R
  3. Q and R
  4. Q and S
  5. R and S
Question 14 Multiple Choice (Single Answer)

Match the columns:

 
Column - I Column - II
A. Black rust 1. Puccinia triticina
B. Brown rust 2. Puccinia recondita
C. Yellow rust 3. Puccinia striiformis
  1. A - 1, B - 2, C - 3
  2. A - 1, B - 3, C - 2
  3. A - 2, B - 1, C - 3
  4. A - 2, B - 3, C - 1
  5. A - 3, B - 2, C - 1
Question 15 Multiple Choice (Single Answer)

Match the columns:

 
Column - I Column - II
A. Loose smut of barley 1. Tilleta laevis
B. Covered smut of barley 2. Ustilago tritici
C. Loose smut of wheat 3. Ustilago hordei
D. Covered smut of wheat 4. Ustilago nuda
  1. A - 2, B - 1, C - 3, D - 4
  2. A - 2, B - 1, C - 4, D - 3
  3. A - 4, B - 3, C - 2, D - 1
  4. A - 3, B - 2, C - 4, D - 1
  5. A - 1, B - 2, C - 3, D - 4
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