Tag: plant diseases

Quizzes (1) Questions (52)

Questions Related to plant diseases

Multiple choice plant diseases keeping diseases away biology

In plants, mosaic formation, leaf rolling and curling, yellowing of plant parts, vein clearing, dwarfing and stunted growth, necrosis etc. are the symptoms of

  1. bacterial diseases

  2. mycoplasmal diseases

  3. viral diseases

  4. fungal diseases.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cucumber mosaic virus causes yellowing and mottling in Gerbera leaves. The CMV disease is described by extreme chlorotic mosaic, greening of veins on leaves, shading breaking in florets achieved with blossom disfigurements, and poor development of the sprout.

So, the correct option is 'viral diseases'.

Multiple choice plant diseases keeping diseases away biology

Which one of the following fungi has been found useful in the biological control of plant diseases?

  1. Penicillium notatum

  2. Phytophthora parasitica

  3. Trichoderma viride

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

A wheat plant is infected by the aecidiospores of black stem rust fungus produced on the alternate host. What is the correct sequence of the following stages in the disease cycle?
a. Uredo stage
b. Pycnidial stage
c. Basidial stage
d. Teleuto stage
e. Aecidial stage
Select the correct answer using the codes given.

  1. $1, 4, 3, 5, 2$
  2. $1, 3, 4, 5, 2$
  3. $1, 2, 3, 4, 5$
  4. $1, 4, 3, 2, 5$
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice plant diseases keeping diseases away biology

The well-known famine in Ireland in the $40$s has been attributed mainly to the failure of the potato crop which was infected by.

  1. Aleraria solani

  2. Phytophthora infestans

  3. Phytophtora parasitica

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

Biological control of some soil-borne plant diseases has been achieved through the use of __________.

  1. Rhizobacteria

  2. Streptomyces

  3. Nostoc

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

Plant Growth-Promoting Rhizobacteria (PGPR) are extensively used for the biological control of soil-borne plant diseases.

Multiple choice plant diseases keeping diseases away biology

Which one of the following is a causal agent of wart disease of potato?

  1. Synchytrium and endobioticum

  2. Plasmodiophora brassicae

  3. Spongospora subterranea

  4. Pseudomonas solanacearum
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Wart disease of potato is caused by Synchytrium endobioticum, a chytrid fungus. The correct scientific name should be written as two words: Synchytrium endobioticum. This pathogen causes tumor-like galls (warts) on potato tubers and is a quarantine disease in many regions. Plasmodiophora brassicae causes club root of crucifers, Spongospora subterranea causes powdery scab of potato, and Pseudomonas solanacearum causes bacterial wilt.

Multiple choice plant diseases keeping diseases away biology

Turnip mosaic disease is caused by

  1. Bacteria

  2. Viruses

  3. Nematodes

  4. Fungi
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Turnip Mosaic Disease is caused by the Turnip Mosaic Virus (TuMV), a potyvirus belonging to family potyviridae, that infects majority of plants belonging to Cruciferae or Brasscicaceae. They virus can be transmitted through vectors - Aphids.

So, the correct answer is 'Viruses'

Multiple choice plant diseases keeping diseases away biology

Which of the following diseases is caused by bacteria?

  1. Tobacco mosaic

  2. Black rot of crucifers

  3. Red rot of sugarcane

  4. Late blight of potato
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Black rot of crucifers is caused by Xanthomonas campestris pv. campestris a bacterial disease common to all cruciferous plants like Broccoli, cabbage, Kale etc. Infecting the stem, leaf, inflorescence and roots.

So, the correct answer is 'Black rot of crucifers'

Multiple choice plant diseases keeping diseases away biology

Pyricularia oryzae causes

  1. Citrus canker

  2. Blast disease of rice

  3. Tungro disease of rice

  4. Tikka disease of groundnut
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Pyricularia oryzae is a fungus that causes rice blast that results in lesions on leaves, stems, peduncles, panicles, seeds, and even roots. 

A. Citrus canker is caused by the bacterium Xanthomonas axonopodis. 
B. Blast disease of rice is caused by Pyricularia oryzae.
C. Tungro disease of rice is caused by the virus pararetrovirus of the family Caulimoviridae.
D. Tikka disease of groundnut is caused by the Cercospora personata.
Hence, the correct answer is 'Blast disease of rice'

Multiple choice plant diseases keeping diseases away biology

Which of the following diseases is caused by virus?

  1. Tabacco mosaic

  2. Late blight of potato

  3. Turnip mosaic

  4. Both (a) and (c)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Tobacco mosaic virus (TMV) is a rod shaped virus, infecting tobacco leaves. It symptoms are mottled appearance that is patches of yellow and green, dwarfing etc. It spreads by mechanical abrasion of the infected tissue with a healthy one.

Turnip mosaic virus (TuMV) is a virus that causes diseases in members of Cruciferae family. It is spread by aphids.
So, the correct answer is 'Both (a) and (c)'