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प्रश्न
What is mycorrhiza?
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उत्तर
Mycorrhiza is a fungus. It forms symbiotic associations with the underground parts, like rhizomes and roots of higher plants occurring in thick, humid forests.
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संबंधित प्रश्न
Name a genus of baculovirus.
How do organic farmers control pests?
How do mycorrhizae act as biofertilizers? Explain.
What is VAM?
Why are baculoviruses considered good biocontrol agents?
Name a genus of fungi that forms a mycorrhizal association with plants.
Give an example of a bacterium, a fungus and an insect that are used as biocontrol agents.
Give the biological name of the following:
The fungus that is being developed as a bio-control agent.
Identify the INCORRECT statement regarding Bacillus thuringiensis.
Which of the following is TRUE regarding Xanthomonas and Pseudomonas?
Which group features jointed appendages?
Match the items in Column ‘A’ and Column ‘B’ and choose correct answer.
| Column I | Column II |
| A. Lady bird | i. Methano bacterium |
| B. Mycorrhiza | ii. Trichoderma |
| C. Biological control | iii. Aphids |
| D. Biogas | iv. Glomus |
The correct answer is:
How has the bacterium Bacillus thuringiensis helped us in controlling caterpillars of insect pests?
How do microbes reduce the environmental degradation caused by chemicals?
Many members of genus Glomus form a mycorrhizal association with plants. Elaborate how is this association beneficial to the plants.
Organic farmer use Baculovirus as biological control agents. Explain.
Which of the following is incorrect regarding Bacillus thuringiensis?
A farmer grew 2 varieties of corn crops in fields A and B. He grew normal corn crops in field A and GM corn crops in field B. He observed corn borers attacked only in field A. To control it, spores of Bt were sprayed in field A.
- Name the gene in the spores responsible for the control of this pest.
- What effect will the spores of Bt have on the insect pest?
- How has field B developed resistance against this pest?
give any two examples of microbial herbicides.
Why are the biocontrol agents preferred over the chemical pesticides?
