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प्रश्न
Give an example of a bacterium, a fungus and an insect that are used as biocontrol agents.
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उत्तर
Examples of biocontrol agents are:
- Bacterium: Bacillus thuringiensis (used against insect pests and mosquito larvae).
- Fungus: Trichoderma (controls many plant diseases).
- Insect: Ladybird (control aphids) and dragonflies (control mosquitoes).
APPEARS IN
संबंधित प्रश्न
With the help of a neat and labelled diagram explain VAM (vesicular arbuscular mycorrhizae).
How do organic farmers control pests?
State the medicinal value and the bioactive molecules produced by Streptococcus, Monascus and Trichoderma.
Mention one advantage and one disadvantage to a farmer who uses them.
Give reasons for the following:
Nitrogenous fertilizers are not applied in fields where leguminous crops grow.
Give two examples of microbial pesticides with their hosts.
Give the biological name of the following:
The fungus that is being developed as a bio-control agent.
Write a note on biocontrol agents.
Select the odd one from given herbicides.
Match the column A with B and rewrite correct pairs
| A | B | |
| I | Mycoherbicides | Cactoblastis |
| II | Bacterial herbicides | Alternaria |
| III | Insects as herbicides | Xanthomonas |
From the following which one is NOT a bacterial herbicide?
Identify the INCORRECT statement regarding Bacillus thuringiensis.
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:
Name any genetically modified crop.
How has the bacterium Bacillus thuringiensis helped us in controlling caterpillars of insect pests?
How do microbes reduce the environmental degradation caused by chemicals?
Describe the main ideas behind the biological control of pests and diseases.
Why are the biocontrol agents preferred over the chemical pesticides?
Which one of the following is NOT an action of biocontrol on a pest?
