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प्रश्न
How has the bacterium Bacillus thuringiensis helped us in controlling caterpillars of insect pests?
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उत्तर
Bacillus thuringiensis produces endotoxin, which disrupts the gut lining of caterpillar larvae, killing them and controlling insect pests effectively. This toxin has been used in biopesticides and genetically modified Bt crops like cotton.
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संबंधित प्रश्न
How do organic farmers control pests?
Given below is a list of six micro-organisms. State their usefulness to humans.
- Nucleopolyhedrovirus
- Saccharomyces cerevisiae
- Monascus purpureus
- Trichoderma polysporum
- Penicillium notatum
- Propionibacterium sharmanii
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?
State the difference in organic farmers approach from that of conventional pest control methods.
Organic farmers prefer the biological control of diseases and pests to the use of chemicals for the same purpose. Justify
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.
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 |
Which of the following is TRUE regarding Bacillus thuringiensis?
Which of the following is TRUE regarding Xanthomonas and Pseudomonas?
Identify the reason/s due to which Trichoclerma species is a potent biocontrol agent.
Which group features jointed appendages?
Which one of the following statements is WRONG in relation to transgenic Bt cotton plant?
Farmers have reported over 50% higher yield of rice by using which of the following biofertilizers?
What for Nucleopolyhydro viruses are being used now a days?
Organic farmer use Trichoderma as biological control agents. Explain.
Nucleopolyhedrovirus do not show ______.
- 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?
Define bioherbicides.
Explain how Bacillus thuringiensis acts as a bio-control agent.
Why are the biocontrol agents preferred over the chemical pesticides?
Protozoan like Nosema locustae is used for controlling the target pests like ______.
