Tag: plant diseases

Questions Related to plant diseases

Which of the following pairs are correctly matched? Disease Causal organism.
a. Kamal bunt of wheat - Fungus
b. Khaira disease of rice- Bacterium
c. Fiji disease of sugarcane- Virus
d. Purple top of potato-Mycoplasma
Select the correct answer from the codes given.

plant diseases keeping diseases away biology

  1. $1, 2$ and $4$

  2. $2, 3$ and $4$

  3. $1, 3$ and $4$

  4. $1, 2$ and $3$

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Correct Option: A

The toxic substance produced by the pathogen causing Brown leaf spot of rice, harming seedlings reducing respiration of the host is?

plant diseases keeping diseases away biology

  1. Piricularian

  2. A-Picolinic acid

  3. Cochliobolin

  4. Ferulic acid

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Correct Option: A

Consider the following diseases of plants.
a. Root knot of sugar-cane.
b. Root rot of wheat.
c. Wilt of cotton.
d. Angular leaf spot of cotton.
Which of these diseases is/are caused by fungi?

plant diseases keeping diseases away biology

  1. $1$ and $4$ only

  2. $2$ only

  3. $2$ and $3$

  4. $1, 3$ and $4$

Show answer
Correct Option: A

Which one of the following pairs is not correctly matched?

plant diseases keeping diseases away biology

  1. Flag smut of wheat - Ustilago nude tritici

  2. Karnal bunt of wheat- Tilletia barclayana

  3. Brown rust of wheat- Puccinia recondite

  4. Powdery mildew of wheat- Erysiphe graminis

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Correct Option: A

Which one of the following diseases of rice is not caused by microbe?

plant diseases keeping diseases away biology

  1. Tip burn of paddy

  2. Stem rot of paddy

  3. False smut of paddy

  4. Blast disease of rise

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Correct Option: A

Which one of the following pairs is not correctly matched?

plant diseases keeping diseases away biology

  1. Tikka disease of groundnut-Cercospora personata

  2. Blast of rice-Ephelis oryzae

  3. Red rot of sugar-cane-Collectotrichum falcatum

  4. Early blight of potato-Alternaria Solani

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Correct Option: A

Which one of the following pairs of plant diseases and symptoms is correctly matched?

plant diseases keeping diseases away biology

  1. Rice infected with Helminthosporium Oryzae- Blight

  2. Jute infected with Macrphoming Phaseolina- Club root

  3. Crucifer infected with Plasmodiophora Brassicae- Rot

  4. Potato infected with Synchytrium- Endobioticum wart

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Correct Option: A

Which one of the following is a copper fungicide?

plant diseases keeping diseases away biology

  1. Boredeaux mixture

  2. Carboxin

  3. Chloropicrin

  4. Mercuric chloride

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Correct Option: A

The major effect of crown gall pathogen on its hosts is the ______________.

plant diseases keeping diseases away biology

  1. Yellowing of leaves and stem

  2. Stunted growth

  3. Hyperplasia and hypertrophy

  4. Matting or foots with small tubercles

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Correct Option: A

Which one of the following antagonists has been commercialized for the biological control of plants diseases?

plant diseases keeping diseases away biology

  1. Peniophora gigantea

  2. Streptomyces rochii

  3. Bacillus subtilis

  4. Aspergillus flavus

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Correct Option: A