Advertisements
Advertisements
प्रश्न
Suggest some of the features of plants that will prevent insect and pest infestation
Advertisements
उत्तर
Some of the features of plants that prevent insects and pest infestation are as follows:
- Hairy leaves are supposed to resist pest attacks, e.g. jassids do not attack cotton and leaf beetle does not attack wheat.
- The solid stem of wheat makes it resistant to stem sawflies.
- Nectar-less cotton varieties do not attract bollworms.
- High aspartic acid, low nitrogen and sugar content in maize lead to resistance to maize stem borers.
APPEARS IN
संबंधित प्रश्न
Give reason :
Emasculation is done in a flower which is selected as female parent.
Name the following:
The semi-dwarf variety of wheat is high-yielding and disease-resistant.
Plant breeding technique has helped sugar industry in North India. Explain how.
How has mutation breeding helped in improving the production of mung bean crop?
Name any two common Indian millet crops.
In Brassica (rapeseed, mustard)........................ varietys is resistant to Aphids.
(a) Pusa A-4
(b) Pusa Gaurav
(c) Pusa Sawni
(d) . Pusa Shubra
What is emasculation?
Name the scientists who Coined the term Diffusion Pressure Deficit
Explain the effect of light and temperature on photosynthesis.
Plants having similar genotypes produced by plant breeding are called
Sonora – 64 is a variety of ______.
Match the columns-
| Column A | Column B | ||
| A. | Kalyan Sona | 1. | Rice |
| B. | Pusa sawani | 2. | Wheat |
| C. | IR - 8 | 3. | Okra |
Which of the following is not an objective of Biofortification in crops?
Several South Indian states raise 2-3 crops of rice annually. The agronomic feature that makes this possible is because of ______.
The term ‘desirable trait’ can mean different things for different plants. Justify the statement with suitable examples.
It is said, that diseases are spreading faster due to globalisation and increased movement of people. Justify the statement taking the example of H5N1 virus.
Discuss the importance of testing of new plant varieties in a geographically vast country like India.
Discuss natural selection and artificial selection. What are the implications of the latter on the process of evolution?
Name two better yielding varieties of rice developed in India.
