Tag: plant diseases

Quizzes (1) Questions (52)

Questions Related to plant diseases

Multiple choice plant diseases keeping diseases away biology

Which one of the following types of organisms causes the disease Potato Witches broom?

  1. Virus

  2. Mycoplasma

  3. Fungus

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

Potato Witches broom is a phytoplasmal disease (caused by phytoplasma, formerly grouped under Mycoplasma-like organisms) characterized by excessive proliferation of shoots.

Multiple choice plant diseases keeping diseases away biology

The foul fishy smell of a volatile chemical trimethylamine in the disease infested wheat field is an indicator of ____________.

  1. Rust

  2. Smut

  3. Blast

  4. Bunt
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Bunt of wheat, caused by Tilletia species, produces teliospores that release trimethylamine, giving off a characteristic foul fishy odor in infested fields.

Multiple choice plant diseases keeping diseases away biology

With reference to the introduction of plant disease into India from other countries, consider the following pairs.
a. Bunchy top of banana- Ceylon(Sri Lanka)
b. Potato tuber moth- Italy
c. Flag sumut of wheat- Fiji
Which of the pairs is/are correctly matched?

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

Bunchy top of banana was introduced from Sri Lanka (1), and the Potato tuber moth was introduced from Italy (2). Flag smut of wheat was not introduced from Fiji.

Multiple choice plant diseases keeping diseases away biology

Leaf hopper which acts as a vector in. The transmission of Tungro virus disease of rice is?

  1. Sagatella orizicola

  2. Inazuma dorsalis

  3. Nilaparvata lugans

  4. Nephotettix impicticeps
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Nephotettix impicticeps is the known green leafhopper vector responsible for transmitting the Tungro virus disease in rice crops.

Multiple choice plant diseases keeping diseases away biology

Match List I(Name of plant disease) with List II(Name of Pathogen) and select the correct answer.

List-I List-II
a. Angular leaf spot of cotton $1$. Phytophora infestans
b. Late blight of potato $2$. Colletotrichum falcatum
c. Red rot of sugarcane $3$. Cercospora personata
d. Tikka leaf spot of groundnut $4$. Xanthornonas malvacearum
  1. A-$3$, B-$1$, C-$4$, D-$2$
  2. A-$4$, B-$1$, C-$2$, D-$3$
  3. A-$3$, B-$4$, C-$2$, D-$1$
  4. A-$4$, B-$2$, C-$1$, D-$3$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Matching the plant diseases to their pathogens: Angular leaf spot of cotton is caused by Xanthomonas malvacearum (A-4), Late blight of potato by Phytophthora infestans (B-1), Red rot of sugarcane by Colletotrichum falcatum (C-2), and Tikka leaf spot of groundnut by Cercospora personata (D-3). This corresponds to option B.

Multiple choice plant diseases keeping diseases away biology

Which one of the following complexes is responsible for the cause of Tundu disease in wheat?

  1. Fungus-nematode

  2. Nematode-bacterium

  3. Fungus-bacterium

  4. Virus-fungus
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Tundu disease of wheat is a composite disease caused by a combination of the seed gall nematode (Anguina tritici) and the bacterium (Clavibacter tritici) working together as a disease complex.

Multiple choice plant diseases keeping diseases away biology

The disease little leaf of fruit trees is caused by the deficiency of ______________.

  1. Copper

  2. Zinc

  3. Manganese

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

Little leaf of fruit trees is a well-known physiological disorder caused by a deficiency of zinc in the soil and plant tissues. Zinc plays a crucial role in auxin synthesis, which directly affects leaf expansion and internode elongation.

Multiple choice plant diseases keeping diseases away biology

Consider the following:
1. Bacillus subtilis                 2. Trichadiama viride
3. erysiphe graminis             4. Septoria glycines
Which of the above antagonistic orgaanisms is /are capable of suppressing plant disease?

  1. 1 and 2

  2. 2 and 3

  3. 2, 3 and 4

  4. 1 only
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Bacillus subtilis and Trichoderma viride are well-documented biological control agents used to suppress various plant pathogens.

Multiple choice plant diseases keeping diseases away biology

Match List-I with List-II and select the correct answer using the codes given the lists.

List-I(Disease) List-II(Pathogen)
a. Bacterial blight of paddy $1$. Pseudomonas
b. Brown rot of potato $2$. Corynebacterium
c. Tundu disease of wheat $3$. Erwinia
d. Fire blight of apples $4$. Xanthomonas
  1. A-$1$, B-$2$, C-$3$, D-$4$
  2. A-$4$, B-$1$, C-$2$, D-$3$
  3. A-$3$, B-$2$, C-$1$, D-$4$
  4. A-$2$, B-$3$, C-$4$, D-$1$
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 disease caused by zinc deficiency?

  1. Die back of rice

  2. Khaira disease of rice

  3. Black heart of potato

  4. Brown spot of rice
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Khaira disease of rice is classically characterized by chlorotic patches that turn brown, caused specifically by a deficiency of zinc. The other listed options correspond to different nutritional disorders or fungal pathogens, such as black heart of potato being caused by oxygen deficiency.