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प्रश्न
Select the odd one from given herbicides.
पर्याय
Cactoblastis
Alternaria
Fusarium
Phytophthora
उत्तर
Cactoblastis
APPEARS IN
संबंधित प्रश्न
With the help of a neat and labelled diagram explain VAM (vesicular arbuscular mycorrhizae).
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Nitrogenous fertilizers are not applied in fields where leguminous crops grow.
How does the activity of each one of the following help in organic farming?
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 |
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- Give an example of a genus of virus used as narrow spectrum insecticidal biocontrol agent.
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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?
