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प्रश्न
How do microbes reduce the environmental degradation caused by chemicals?
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उत्तर
Chemicals from fertilisers and pesticides are highly toxic to human beings and animals alike and have been polluting our environment. To reduce the environmental degradation caused by chemicals, microbes can be used both as fertilizers and pesticides and can be called bio fertilisers and biopesticides, respectively Microbes are used as bio fertilisers to enrich the soil nutrients, e.g., Rhizobium Azotobacter, Azospirillum, etc, which can fix atmospheric nitrogen in the soil. Bacillus thuringiensis bacteria act as biopesticides to control the growth of insect pests. Trichoderma, fungal species is an effective biocontrol agent of several plant pathogens. Baculovirus used as a biological control agent in the genus Nucleopolyhedrovirus is excellent for species-specific, narrow spectrum insecticidal applications.
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संबंधित प्रश्न
With the help of a neat and labelled diagram explain VAM (vesicular arbuscular mycorrhizae).
Name a genus of baculovirus.
Name the bioactive molecules produced by Trichoderma polysporum and Monascus purpureus.
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.
Why are the spores of Bacillus thuringiensis used as bioinsecticide?
______ are controlled by the microbial herbicide Phytophthora palmivora.
Which of the following statements regarding biocontrol agents are correct?
Which of the following is TRUE regarding Xanthomonas and Pseudomonas?
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.
Nucleopolyhedrovirus do not show ______.
Which insect biocontrol agent is specifically useful for eliminating aphids?
Which protozoan biocontrol agent is used against grasshoppers, caterpillars, corn borers, and crickets?
What is the definition of bioherbicides?
Which fungal biocontrol agent is used to control aphids, mites, and whiteflies?
What is an example of a transgenic plant mentioned as a category of bioherbicide?
