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Plant Disease MCQ

33 MCQ questions with answers and explanations · page 1 of 2

Test yourself▶ 25 question test

Q1. Rust of wheat is a-

  1. AFungal disease
  2. BViral disease
  3. CHormonal disorder
  4. DBacterial disease
Show answer & explanation

Answer: A) Fungal disease

Q2. Which of the following is used as rodenticide ?

  1. AZinc phosphide
  2. BZinc carbonate
  3. CZinc chloride
  4. DZinc sulphide
Show answer & explanation

Answer: A) Zinc phosphide

Q3. The deadly disease of groudnut is-

  1. ATikka
  2. BDamping off
  3. CPowdery mildew
  4. DNone of these
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Answer: A) Tikka

Q4. Damping off of seedlings is caused by :

  1. APeronospora parasitica
  2. BPythium debaryanum
  3. CAlbugo candida
  4. DPhytophthora infestans
Show answer & explanation

Answer: B) Pythium debaryanum

Q5. Red rust disease of tea is caused by-

  1. ABacteria
  2. BLichen
  3. CFungi
  4. DGreen algae
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Answer: D) Green algae

Q6. Green ear disease is related with the crop-

  1. AMustard
  2. BPaddy
  3. CBajara
  4. DGround nut
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Answer: C) Bajara

Q7. Which of the following stage of development of insect is most garmfull for crop ?

  1. AEgg
  2. BPupa
  3. CCaterpillar
  4. DEmago
Show answer & explanation

Answer: C) Caterpillar

Q8. Red rot of sugarcane is caused by-

  1. AColletotrichum falcatum
  2. BCercopspora personata
  3. CAlternaria alterrnata
  4. DPhytophthora Infestans
Show answer & explanation

Answer: A) Colletotrichum falcatum

Q9. Little leaf rosetting is deficiency symptom of-

  1. AZn
  2. BMn
  3. CCu
  4. DBacterial disease
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Answer: A) Zn

Q10. The scientist who studied about wheat rust problem-

  1. AH.C. Bose
  2. BK.C. Mehta
  3. CBirbal Shani
  4. DD. D. pant
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Answer: B) K.C. Mehta

Q11. The disease fire blight is related with-

  1. AApple
  2. BCoconut
  3. COrange
  4. DGrape
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Answer: A) Apple

Q12. Black rust of wheat is caused by-

  1. AErysiphe
  2. BAlbugo
  3. CPuccinia gramiris
  4. DColletatrichum
Show answer & explanation

Answer: C) Puccinia gramiris

Q13. Which of the follwing fungus cause green ear disease of bajra-

  1. APhytophthora infestans
  2. BAlbugo Candida
  3. CSclerospora graminicola
  4. DCerrcospora personata
Show answer & explanation

Answer: C) Sclerospora graminicola

Q14. Fungus responsible for disease late blight of potato is

  1. ACercospora personata
  2. BPhytophthora infestans
  3. CClaviceps purpurea
  4. DSclerospora graminicola
Show answer & explanation

Answer: B) Phytophthora infestans

Q15. Citrus Canker is a-

  1. ASpecies of lemon
  2. BMosaic disease
  3. CA disease in lemon
  4. DNone of these
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Answer: C) A disease in lemon

Q16. Which of the following disease is not caused by fungus in plants ?

  1. ATikka disease of ground nut
  2. BRed rot of sugarcane
  3. CGreen ear disease of bajara
  4. DMosiac disease of bajara
Show answer & explanation

Answer: D) Mosiac disease of bajara

Q17. Black heart of potato is due to-

  1. ADeficiency of copper
  2. BDeficiency of boron
  3. CDeficiency of oxygen
  4. DDeficiency of potassium
Show answer & explanation

Answer: C) Deficiency of oxygen

Q18. Element playing role in nitrogen fixation-

  1. AMn
  2. BMo
  3. CZn
  4. DCu
Show answer & explanation

Answer: B) Mo

Q19. Sulphur is absorbed by plant as-

  1. ASO3 from soil
  2. BSO2 from air
  3. CSO4 from soil
  4. DBoth b and c
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Answer: C) SO4 from soil

Q20. White bud in maize indicates acute deficiency of-

  1. ASulphur
  2. BPotassium
  3. CZinc
  4. DManganese
Show answer & explanation

Answer: C) Zinc

Q21. Plant require Fe and Mg for-

  1. ASynthesis of Chlorophyll
  2. BOpening and closing of stomata
  3. CEnergy transfer during photosynthesis and respiration
  4. DTranslocation of carbohydrate
Show answer & explanation

Answer: A) Synthesis of Chlorophyll

Q22. Nitrogen fixing enzyme found in root nodules is-

  1. ANitrogen estrase
  2. BNitrogenase
  3. CNitrase
  4. DNitrosomans
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Answer: B) Nitrogenase

Q23. Deficiency of magnesium causes-

  1. ANecrosis
  2. BPlasmolysis
  3. CHydrolysis
  4. DChlorosis
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Answer: D) Chlorosis

Q24. Most of the plant obtain nitrogen from the soil in the form of-

  1. AFree nitrogen gas
  2. BNitric acid
  3. CNitrites
  4. DNitrates
Show answer & explanation

Answer: D) Nitrates

Q25. Internal cork of apple is deficiency symptom of-

  1. AMo
  2. BB
  3. CCu
  4. DZn
Show answer & explanation

Answer: B) B

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