Tag: plant diseases

Quizzes (1) Questions (52)

Questions Related to plant diseases

Multiple choice plant diseases keeping diseases away biology

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.

  1. $1, 2$ and $4$
  2. $2, 3$ and $4$
  3. $1, 3$ and $4$
  4. $1, 2$ and $3$
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice plant diseases keeping diseases away biology

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

  1. Piricularian

  2. A-Picolinic acid

  3. Cochliobolin

  4. Ferulic acid
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice plant diseases keeping diseases away biology

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?

  1. $1$ and $4$ only
  2. $2$ only
  3. $2$ and $3$
  4. $1, 3$ and $4$
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice plant diseases keeping diseases away biology

Which one of the following pairs is not correctly matched?

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Flag smut of wheat is caused by Urocystis agropyri, not Ustilago nuda tritici (which causes loose smut). Thus, this pair is incorrectly matched.

Multiple choice plant diseases keeping diseases away biology

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

  1. Tip burn of paddy

  2. Stem rot of paddy

  3. False smut of paddy

  4. Blast disease of rise
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Tip burn of paddy is a physiological disorder caused by environmental factors like high temperature or water stress, not by a living microbe. In contrast, stem rot, false smut, and blast are all caused by fungal pathogens.

Multiple choice plant diseases keeping diseases away biology

Which one of the following pairs is not correctly matched?

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice plant diseases keeping diseases away biology

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

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice plant diseases keeping diseases away biology

Which one of the following is a copper fungicide?

  1. Boredeaux mixture

  2. Carboxin

  3. Chloropicrin

  4. Mercuric chloride
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Bordeaux mixture is a classic fungicide made from copper sulfate and lime. Carboxin is a systemic fungicide, while Chloropicrin is a fumigant and Mercuric chloride is a heavy metal disinfectant.

Multiple choice plant diseases keeping diseases away biology

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

  1. Yellowing of leaves and stem

  2. Stunted growth

  3. Hyperplasia and hypertrophy

  4. Matting or foots with small tubercles
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice plant diseases keeping diseases away biology

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

  1. Peniophora gigantea

  2. Streptomyces rochii

  3. Bacillus subtilis

  4. Aspergillus flavus
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Peniophora gigantea (now Phlebiopsis gigantea) was one of the first fungi to be successfully commercialized for the biological control of root rot in conifers.