Advertisements
Advertisements
प्रश्न
How do microbes reduce the environmental degradation caused by chemicals?
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Name and explain the type of interaction that exists in mycorrhizae and between cattle egret and cattle.
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.
Name the type of association that the genus Glomus exhibits with higher plants.
Explain the significant role of the genus Nucleopolyhedrovirus in an ecological sensitive area.
Organic farmers prefer the biological control of diseases and pests to the use of chemicals for the same purpose. Justify
Give the biological name of the following:
The microbe used to control insect larvae growing on cotton.
______ are controlled by the microbial herbicide Phytophthora palmivora.
Which of the following can be killed using Nosema locustae?
Identify the INCORRECT statement regarding Bacillus thuringiensis.
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:
- 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.
Which one of the following is NOT an action of biocontrol on a pest?
What is the mechanism by which Bacillus thuringiensis (Bt) kills insect larvae?
What is the function of substances such as viridin, gliotoxin, and gliovirin produced by Trichoderma species?
Which fungal biocontrol agent is used to control aphids, mites, and whiteflies?
Why are baculoviruses described as 'species-specific' biocontrol agents?
