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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
Trichoderma konigi is a source of _______ enzyme.
(A) invertase
(B) lipase
(C) pectinase
(D) cellulase
Name the bioactive molecules produced by Trichoderma polysporum and Monascus purpureus.
Why are the spores of Bacillus thuringiensis used as bioinsecticide?
Give the biological name of the following:
The microbe used to control insect larvae growing on cotton.
Select the odd one from given herbicides.
What is mycorrhiza?
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?
Describe the main ideas behind the biological control of pests and diseases.
Organic farmer use Trichoderma as biological control agents. Explain.
Organic farmer use Baculovirus as biological control agents. Explain.
- 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?
Explain how Bacillus thuringiensis acts as a bio-control agent.
Which one of the following is NOT an action of biocontrol on a pest?
Which protozoan biocontrol agent is used against grasshoppers, caterpillars, corn borers, and crickets?
Which of the following is an example of a smother crop?
Which insect is used as a biological herbicide to control the weed Senecio jacobeae?
What is the primary reason biocontrol is needed according to the material?
What plant insect pest does Bacillus thuringiensis specifically target on Brassicas and fruit trees?
What is the relationship between biopesticides and chemical pesticides in terms of safety?
