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प्रश्न
Give two examples of microbial pesticides with their hosts.
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उत्तर
| Pathogen | Host range |
|
Bacteria : Bacillus thuringiensis(Bt) |
Caterpillars (larvae of moths and butterflies), larvae of Aedes, black flies, some adult beetles, wax moths, etc. |
|
Fungi : Beauveria bassiana |
Aphids, mealy bugs, mites, white files, etc. |
|
Protozoans : Nosema locustae |
Grasshoppers, caterpillars, some corn-borers and crickets |
|
Viruses : Nucleopolyhedrovirus or NPV (125 types known) |
Gypsy moths and caterpillars |
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संबंधित प्रश्न
How do organic farmers control pests?
State the medicinal value and the bioactive molecules produced by Streptococcus, Monascus and Trichoderma.
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Give the biological name of the following:
The fungus that is being developed as a bio-control agent.
Select the odd one from given herbicides.
Which of the following can be killed using Nosema locustae?
Which one of the following statements is WRONG in relation to transgenic Bt cotton plant?
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:
- Give an example of a genus of virus used as narrow spectrum insecticidal biocontrol agent.
- How does its use serve as an aid in overall integrated pest management programme?
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?
