Tag: keeping diseases away

Questions Related to keeping diseases away

Pusa Komal variety of Cow Pea Is resistant to disease

plant diseases keeping diseases away biology

  1. White rust

  2. Leaf curl

  3. Bacterial blight

  4. Hill bunt.

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Correct Option: C

Plants can be made disease resistant through

plant diseases keeping diseases away biology

  1. Colchicine treatment

  2. X-ray treatment

  3. Breeding with wild relatives

  4. Hormone treatment.

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Correct Option: C

On the basis of symptoms of chlorosis in leaves a student inferred that this was due to deficiency of nitrogen. This inference could be correct only if we assume that yellowing of leaves appeared first in.

plant diseases keeping diseases away biology

  1. Old leaves

  2. Young leaves

  3. Young leaves followed by mature leaves

  4. Mature leaves followed by young leaves

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Correct Option: A
Explanation:

  • On the basis of the symptoms of chlorosis in the leaves, a student inferred that this was due to the deficiency of nitrogen. 
  • This may be correct inference only if yellowing of leaves appeared first in young leaves then in old leaves. But Chlorosis is the main symptom of nitrogen deficiency. 
  • Therefore, the leaves gradually become pale or yellow. These will first appear in old leaves and then in young leaves.
  • The correct option is A.

An Albugo caused disease in which pustules on the surface of leaves, stem inflorescence and floral parts along with various type of deformities of which, hypertrophy is most pronounced, are the characteristic symptoms of ___________________.

plant diseases keeping diseases away biology

  1. Yellow stripe rust of wheat

  2. White rust of mustard

  3. Yellow ear rot and ear cockle of wheat

  4. Udbatta disease of rice

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Correct Option: A

Which one of the following statements is not correct?

plant diseases keeping diseases away biology

  1. The bunt of rice is found only in southern India

  2. The pathogen of the stem rot of rice belongs to Deuteromycetes.

  3. The blast disease of rice affects the crop in all stages

  4. In the brown spot disease of rice all parts of the plant are infected exept roots.

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Correct Option: A

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

plant diseases keeping diseases away biology

  1. Virus

  2. Mycoplasma

  3. Fungus

  4. Bacteria

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Correct Option: A

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

plant diseases keeping diseases away biology

  1. Rust

  2. Smut

  3. Blast

  4. Bunt

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Correct Option: A

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?

plant diseases keeping diseases away biology

  1. $1$ and $2$ only

  2. $2$ only

  3. $1$ and $3$ only

  4. $1, 2$ and $3$

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Correct Option: A

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

plant diseases keeping diseases away biology

  1. Sagatella orizicola

  2. Inazuma dorsalis

  3. Nilaparvata lugans

  4. Nephotettix impicticeps

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Correct Option: A

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
plant diseases keeping diseases away biology

  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-$3$

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Correct Option: A