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प्रश्न
Describe the main ideas behind the biological control of pests and diseases.
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उत्तर
Biological control means life against life. It’s a natural and eco-friendly concept. It employs natural organisms to control the population of pathogens and pests in an ecosystem. Classical examples are Trichoderma which is an antagonist against many soil-borne plant pathogens. Similarly, Penicillium inhibits the growth of Staphylococcus and therefore has been successfully used in the production of Penicillin antibiotics to control many human bacterial pathogens.
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संबंधित प्रश्न
Name and explain the type of interaction that exists in mycorrhizae and between cattle egret and cattle.
Name the bioactive molecules produced by Trichoderma polysporum and Monascus purpureus.
How do mycorrhizae act as biofertilizers? Explain.
Mention one advantage and one disadvantage to a farmer who uses them.
What is VAM?
State the difference in organic farmers approach from that of conventional pest control methods.
How does the activity of each one of the following help in organic farming?
Mycorrhiza
Which of the following statements regarding biocontrol agents are correct?
Which of the following is TRUE regarding Bacillus thuringiensis?
Identify the INCORRECT statement regarding Bacillus thuringiensis.
Which of the following is TRUE regarding Xanthomonas and Pseudomonas?
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?
Which of the following is incorrect regarding Bacillus thuringiensis?
- 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?
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?
Why are the biocontrol agents preferred over the chemical pesticides?
