Tag: plant breeding for disease resistance and insect resistance

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Questions Related to plant breeding for disease resistance and insect resistance

Multiple choice botany plant breeding plant breeding for disease resistance and insect resistance method of plant breeding for crop improvement plant breeding for food production

Which of the following is incorrectly paired?

  1. Wheat - Himgiri

  2. Milch - Sahiwal

  3. Rice - Ratna

  4. Pusa Komal - Brassica
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Pusa Komal is a variety of cowpea (Vigna unguiculata). Developed by IARI, New Delhi and is resistant to bacterial blight diseases. It belongs to family Fabaceae.

So, the correct answer is 'Pusa Komal - Brassica'

Multiple choice botany plant breeding plant breeding for disease resistance and insect resistance method of plant breeding for crop improvement plant breeding for food production

Resistance to $jassids$ in cotton plants and to cereal leaf beetle in wheat plants is due to _____________.

  1. Biochemical characters

  2. Physiological characters

  3. Morphological characters

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Resistance to jassids in cotton and cereal leaf beetle in wheat is primarily due to morphological characters, such as the presence of hairs (trichomes) on the leaves.

Multiple choice botany plant breeding plant breeding for disease resistance and insect resistance method of plant breeding for crop improvement plant breeding for food production

Hairy leaves of many plants are associated with ________________.

  1. Resistance to insect pests

  2. Resistance to viruses

  3. Resistance to fungi

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

Hairy leaves (trichomes) act as a physical barrier that prevents insects from landing, feeding, or laying eggs, thus providing resistance to pests.

Multiple choice botany plant breeding plant breeding for disease resistance and insect resistance method of plant breeding for crop improvement plant breeding for food production

Which of the following statements is correct regarding nectarless cotton varieties?

  1. They do not attract stem sawfly

  2. They are produced by mutation breeding

  3. They do not attract bollworms

  4. They attract cereal leaf beetle.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Nectarless cotton varieties are known to be resistant to bollworms because the absence of nectar reduces the food source for the adult moths.

Multiple choice botany plant breeding plant breeding for disease resistance and insect resistance method of plant breeding for crop improvement plant breeding for food production

Maize generates resistance against stem borers by having ___________________.

  1. Low aspartic acid, high nitrogen and sugar content

  2. Low aspartic acid, sugar but high nitrogen content

  3. Low aspartic acid, nitrogen but low sugar content

  4. Low aspartic acid, low nitrogen and sugar content
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Maize resistance to stem borers is associated with high aspartic acid, low nitrogen, and low sugar content in the plant tissues.

Multiple choice botany plant breeding plant breeding for disease resistance and insect resistance method of plant breeding for crop improvement plant breeding for food production

Yellow mosaic virus resistant variety $Parbhani$ $Kranti$ belongs to __________.

  1. Bhindi

  2. Barley

  3. Chilli

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

Parbhani Kranti is a well-known variety of Bhindi (okra) developed through mutation breeding specifically for resistance to the Yellow Mosaic Virus. The other options listed are not associated with this specific variety.

Multiple choice botany plant breeding plant breeding for disease resistance and insect resistance method of plant breeding for crop improvement plant breeding for food production

Exchange of germplasm is carried mostly through shoot tips because it is

  1. Cheap

  2. Small and handy

  3. Virus free

  4. Genetically stable
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Shoot tip culture maintains virus free plant. It is used for international exchange of germplasm is vegetatively multiplied cultivars, e.g., Banana, Potato.

Multiple choice botany plant breeding plant breeding for disease resistance and insect resistance method of plant breeding for crop improvement plant breeding for food production

Any organism that damages the economic and physical well-being of humans is called

  1. Exoparasite

  2. Commensal

  3. Parasite

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

competes with humans, domestic animals, or desirable plants for food or An organism should not be considered a pest until it is proven to be one. The economic losses caused by pest damage, if the pest population continued to or component sharing the site usually affect the actions and well-being of many others. So, the correct option is "D" (Pest).

Multiple choice botany plant breeding plant breeding for disease resistance and insect resistance method of plant breeding for crop improvement plant breeding for food production

Pusa Gaurav variety resistant to insect pest developed by hybridization and selection belong to:

  1. Flat bean

  2. Okra

  3. Rapeseed mustard

  4. Wheat
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
 CROP VARIETY  INSECT PESTS 
Brassica (rapeseed mustard)   Pusa Gaurav   Aphids. 

So, the correct option is 'rapeseed mustard'

Multiple choice botany plant breeding plant breeding for disease resistance and insect resistance method of plant breeding for crop improvement plant breeding for food production

Pyrilla is a

  1. A character of ancient Greek mythology

  2. An insect pest

  3. Disease of teeth and gums

  4. A building heated by solar energy
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Pyrilla is the most destructive foliage-sucking pest of sugarcane. Heavy rainfall followed by 75-80% humidity, intermittent drought periods, high temperature (26-300c) and wind movement favours rapid build-up of the pest. Cane yield loss is about 28% while 1.6% unit loss in sugar content. Due to continuous desapping by large number of hoppers, top leaves in the affected canes dry up and lateral buds germinate. The hoppers exude a sweet sticky fluid known as honeydew, which promotes quick and luxuriant growth of the fungus, capanodium species and as a result the leaves are completely covered by the sooty mould.
So the correct option is 'an insect pest'.