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प्रश्न
How do organic farmers control pests?
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उत्तर
Organic farmers control pests by maintaining a balanced ecosystem where pests are kept at manageable levels without eradication. They use biological control methods, relying on natural predators and parasites. For example, ladybirds control aphids, and dragonflies control mosquitoes. This approach avoids chemical pesticides, preserving beneficial organisms and reducing environmental harm.
संबंधित प्रश्न
With the help of a neat and labelled diagram explain VAM (vesicular arbuscular mycorrhizae).
Name and explain the type of interaction that exists in mycorrhizae and between cattle egret and cattle.
Mention one advantage and one disadvantage to a farmer who uses them.
Explain the significant role of the genus Nucleopolyhedrovirus in an ecological sensitive area.
Why are baculoviruses considered good biocontrol agents?
Give reasons for the following:
Nitrogenous fertilizers are not applied in fields where leguminous crops grow.
Why are the spores of Bacillus thuringiensis used as bioinsecticide?
How does the activity of each one of the following help in organic farming?
Mycorrhiza
Write a note on biocontrol agents.
______ are controlled by the microbial herbicide Phytophthora palmivora.
Identify the INCORRECT statement regarding Bacillus thuringiensis.
Which of the following is the host for microbial pesticide Beauveria bassiana?
The free-living fungus Trichoderma can be used for ______.
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?
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.
Why are the biocontrol agents preferred over the chemical pesticides?
