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
With the help of a neat and labelled diagram explain VAM (vesicular arbuscular mycorrhizae).
How do organic farmers control pests?
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.
Give reasons for the following:
Nitrogenous fertilizers are not applied in fields where leguminous crops grow.
Organic farmers prefer the biological control of diseases and pests to the use of chemicals for the same purpose. Justify
______ are controlled by the microbial herbicide Phytophthora palmivora.
Which of the following is TRUE regarding Bacillus thuringiensis?
Identify the reason/s due to which Trichoclerma species is a potent biocontrol agent.
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?
Describe the main ideas behind the biological control of pests and diseases.
Many members of genus Glomus form a mycorrhizal association with plants. Elaborate how is this association beneficial to the plants.
Organic farmer use Trichoderma as biological control agents. Explain.
- 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?
give any two examples of microbial herbicides.
Explain how Bacillus thuringiensis acts as a bio-control agent.
Which one of the following is NOT a bioherbicide of bacterial origin?
