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प्रश्न
How do organic farmers control pests? Give two examples.
उत्तर
Organic farmers control pests by using natural predation instead of introduced chemicals. Microbial biocontrol agents are species-specific pesticides.
(1) Example: Bacillus thuringiensis is a bacterium which produces a toxin which specifically kills insect larvae such as lepidopterans (armyworms), coleopterans (beetles) and dipterans (flies/mosquitoes), leaving aside all other non-targeted organisms.
(2) Another biocontrol agent is Trichoderma sp. which is a free-living fungus and works as a biocontrol agent against several plant pathogens.
APPEARS IN
संबंधित प्रश्न
Name a genus of baculovirus.
Name the bioactive molecules produced by Trichoderma polysporum and Monascus purpureus.
Explain the significant role of the genus Nucleopolyhedrovirus in an ecological sensitive area.
Why are baculovirus considered good bio-control agents?
Give reasons for the following:
Nitrogenous fertilizers are not applied in fields where leguminous crops grow.
Select the odd one from given herbicides.
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 group features jointed appendages?
What for Nucleopolyhydro viruses are being used now a days?
give any two examples of microbial herbicides.
