Tag: plant diseases

Quizzes (1) Questions (52)

Questions Related to plant diseases

Multiple choice plant diseases keeping diseases away biology

Match List I with List II and select the correct answer.

List-I List-II
a. Ascobolus $1$. Lignicolous
b. Erysiphe $2$. Bunt disease
c. Polyporous $3$. Ectoparasite
d. Tilletia $4$. Coprophilous
  1. A-$4$, B-$3$, C-$2$, D-$1$
  2. A-$3$, B-$4$, C-$2$, D-$1$
  3. A-$4$, B-$3$, C-$1$, D-$2$
  4. A-$3$, B-$4$, C-$1$, D-$2$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ascobolus is coprophilous (grows on dung), Erysiphe is an ectoparasite (powdery mildew), Polyporus is lignicolous (wood-decaying), and Tilletia causes bunt disease.

Multiple choice plant diseases keeping diseases away biology

The staple crop in Ireland was completely destroyed in $1844-1846$, by a fungal disease resulting in a great famine. The causal organism in this case was _____________.

  1. Puccinia graininis

  2. Ustilago tritici

  3. Phytophthora infestans

  4. Claviceps purpurea
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The devastating Irish potato famine of the 1840s was caused by late blight of potato, an aggressive disease driven by the oomycete/fungal-like organism Phytophthora infestans. This pathogen rapidly destroyed foliage and tubers across the country.

Multiple choice plant diseases keeping diseases away biology

Consider the following organisms.
a. Viruses
b. Bacteria
c. Mycoplasmas
d. Fungi
The correct chronological sequence in which they were, recognized as incidents of plant diseases is?

  1. $1, 2, 3, 4$
  2. $4, 2, 1, 3$
  3. $4, 1, 3, 2$
  4. $1, 4, 2, 3$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Fungi were historically recognized first as causes of plant diseases, followed chronologically by bacteria, viruses, and mycoplasmas as microscopic techniques advanced. This establishes the sequence starting with fungi (4), then bacteria (2), viruses (1), and mycoplasmas (3).

Multiple choice plant diseases keeping diseases away biology

Which one of the following pairs is NOT correctly matched?

  1. Wart disease - Synchytrium of potato endobioticum

  2. Soft rot of- Phtomonas ricinii of wheat ears

  3. Bacterial rot- Phytomonas ricinii of wheat ears

  4. Late blight- Phytophthora infections of potato
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice plant diseases keeping diseases away biology

Match List-I with List-II and select the correct answer.

List-I(Common name) List-II(Scientific name)
a. White rust $1$. Puccinia graminis
b. Yellow rust $2$. Puccinia triticina
c. Brown rust $3$. Puccinia glumarum
d. Black rust $4$. Albugo candica
  1. A-$4$, B-$2$, C-$3$, D-$1$
  2. A-$3$, B-$2$, C-$4$, D-$1$
  3. A-$4$, B-$3$, C-$2$, D-$1$
  4. A-$3$, B-$2$, C-$1$, D-$4$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

White rust is caused by Albugo candida (a-4), yellow rust by Puccinia glumarum or striiformis (b-3), brown rust by Puccinia triticina (c-2), and black rust by Puccinia graminis (d-1). Matching these gives the sequence A-4, B-3, C-2, D-1.

Multiple choice plant diseases keeping diseases away biology

Crown gall symptoms are present in ______________.

  1. Peas, apple and sugarcane

  2. Pear, grapes and sugarcane

  3. Apple, grapes and sugarcane

  4. Pear, apple and grapes
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Crown gall primarily affects woody dicotyledonous plants, including common fruit trees and vines such as apples, pears, and grapes. Sugarcane is a monocot and is not a typical host for crown gall tumors.

Multiple choice plant diseases keeping diseases away biology

Consider the following events.
a. Germ tube formation
b. Aspersoria formation
c. Penetration
d. Haustoria's formation.
The correct sequence in which these events take place during plant infection is?

  1. $2, 1, 4, 3$
  2. $2, 3, 1, 4$
  3. $1, 2, 3, 4$
  4. $1, 2, 4, 3$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The standard sequence of fungal infection begins with spore germination to form a germ tube, followed by the swelling of its tip into an appressorium, mechanical or chemical penetration of the host cuticle, and finally the development of haustoria inside host cells.

Multiple choice plant diseases keeping diseases away biology

Crown gall disease enhances ________________.

  1. Meristematic activity

  2. Development of chloroplasts

  3. Reduction in leaf size

  4. Alteration in the morphology of flowers
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Crown gall disease involves the transfer of T-DNA into the plant genome, which causes the plant cells to produce auxins and cytokinins, leading to excessive meristematic activity and tumor growth.

Multiple choice plant diseases keeping diseases away biology

Which one of the following diseases is caused by mycoplasma-like organism?

  1. Sugarcane mosaic disease

  2. Wilt disease of sugarcane

  3. Ring spot of sugarcane

  4. Grassy shoot of sugarcane
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Grassy shoot disease of sugarcane is a classic phytoplasma disease, formerly known as a mycoplasma-like organism (MLO) infection. Mosaic, wilt, and ring spot of sugarcane are caused by viruses or fungi.

Multiple choice plant diseases keeping diseases away biology

Which of the following is not a viral disease of plants?

  1. Red rot of sugarcane

  2. Tobacco mosaic disease

  3. Leaf curl of tomato

  4. Tristeza disease of citrus
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Red decay is the most widely recognized infection of sugarcane, caused by the growth Colletotrichum falcatum Went. 

So, the correct option is 'Red rot of sugarcane'.