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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
Name a genus of baculovirus.
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
Name the type of association that the genus Glomus exhibits with higher plants.
Give reasons for the following:
Nitrogenous fertilizers are not applied in fields where leguminous crops grow.
Give two examples of microbial pesticides with their hosts.
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?
How does the activity of each one of the following help in organic farming?
Mycorrhiza
What is mycorrhiza?
Match the column A with B and rewrite correct pairs
| A | B | |
| I | Mycoherbicides | Cactoblastis |
| II | Bacterial herbicides | Alternaria |
| III | Insects as herbicides | Xanthomonas |
______ are controlled by the microbial herbicide Phytophthora palmivora.
Which of the following is the INCORRECT statement with respect to biocontrol agents?
Identify the INCORRECT statement regarding Bacillus thuringiensis.
Which of the following is the INCORRECT statement?
Which one of the following statements is WRONG in relation to transgenic Bt cotton plant?
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.
Why are the biocontrol agents preferred over the chemical pesticides?
