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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
State the medicinal value and the bioactive molecules produced by Streptococcus, Monascus and Trichoderma.
State the difference in organic farmers approach from that of conventional pest control methods.
Organic farmers prefer the biological control of diseases and pests to the use of chemicals for the same purpose. Justify
Give an example of a bacterium, a fungus and an insect that are used as biocontrol agents
Answer the following question:
Why are the spores of Bacillus thuringiensis used as bioinsecticide?
Give the biological name of the following:
The microbe used to control insect larvae growing on cotton.
What is mycorrhiza?
Which group features jointed appendages?
How has the bacterium Bacillus thuringiensis helped us in controlling caterpillars of insect pests?
Describe the main ideas behind the biological control of pests and diseases.
