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प्रश्न
How does the activity of each one of the following help in organic farming?
Mycorrhiza
उत्तर
Fungi are known to form symbiotic associations with plants, this association is called mycorrhiza.
The fungal symbiont in these associations absorbs phosphorus from soil and passes it to the plant.
This association help the plant to absorb phosphorus in a natural way thus help in Organic farming.
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संबंधित प्रश्न
Given below is a list of six micro-organisms. State their usefulness to humans.
(a) Nucleopolyhedrovirus
(b) Saccharomyces cerevisiae
(c) Monascus purpureus
(d) Trichoderma polysporum
(e) Penicillium notatum
(f) Propionibacterium sharmanii
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Match the column A with B and rewrite correct pairs
| A | B | |
| I | Mycoherbicides | Cactoblastis |
| II | Bacterial herbicides | Alternaria |
| III | Insects as herbicides | Xanthomonas |
Which of the following can be killed using Nosema locustae?
Which of the following is the host for microbial pesticide Beauveria bassiana?
Which of the following is TRUE regarding Xanthomonas and Pseudomonas?
The free-living fungus Trichoderma can be used for ______.
Many members of genus Glomus form a mycorrhizal association with plants. Elaborate how is this association beneficial to the plants.
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?
