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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
With the help of a neat and labelled diagram explain VAM (vesicular arbuscular mycorrhizae).
How do mycorrhizae act as biofertilizers? Explain.
Why are baculoviruses considered good biocontrol agents?
Give reasons for the following:
Nitrogenous fertilizers are not applied in fields where leguminous crops grow.
Match the column A with B and rewrite correct pairs
| A | B | |
| I | Mycoherbicides | Cactoblastis |
| II | Bacterial herbicides | Alternaria |
| III | Insects as herbicides | Xanthomonas |
Which of the following is the host for microbial pesticide Beauveria bassiana?
Identify the reason/s due to which Trichoclerma species is a potent biocontrol agent.
What for Nucleopolyhydro viruses are being used now a days?
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?
What is the relationship between biopesticides and chemical pesticides in terms of safety?
