Tag: keeping diseases away

Quizzes (14) Questions (97)

Questions Related to keeping diseases away

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
B Correct answer
Explanation

Blast of rice is caused by the fungus Magnaporthe oryzae, previously known as Pyricularia oryzae, rather than Ephelis oryzae. The other three pairs correctly match the disease name with its actual fungal causal organism.

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
D Correct answer
Explanation

Potato wart disease is famously caused by the chytrid fungus Synchytrium endobioticum, which produces characteristic wart-like outgrowths on tubers. The other choices feature mismatched symptoms or incorrect pathogen-host pairings.

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
C Correct answer
Explanation

Crown gall disease, caused by Agrobacterium tumefaciens, induces uncontrolled cell division and enlargement in infected plant tissues. This abnormal cell proliferation is characterized biologically as hyperplasia and hypertrophy.

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.

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.