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Question
Which of the following is not a biocontrol agent?
Which of the following is not a biocontrol agent?
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Solution
The correct option is C DDT
Biopesticides are the pesticides of biological origin which are used in agriculture for the control of pests. Biological control of pests using biopesticides involves the use of natural predators of a pest species, to keep its growth in check. It aims at keeping the population size at a manageable level to maintain a sustainable ecosystem.
DDT or Dichloro diphenyl trichloro ethane is a chemical pesticide used against insect pests. DDT is a non-biodegradable persistent environmental pollutant which cannot be easily broken down by decomposers. Even if it is broken down after extensive exposure to soil microbes, the breakdown products also persist in the environment for a long time. Once consumed by living organisms, it keeps accumulating and its concentration is magnified at each successive trophic level, leading to bio accumulation.
DDT can disrupt the human endocrine system and can also induce cancers. Exposure to high doses can lead to vomiting, tremors or shakiness and seizures in humans. It can also affect the liver and reproductive system in some animals. Thus it is a highly toxic chemical whose use should be minimised.
Bt toxin, Trichoderma and Nucleopolyhedrovirus are biopesticides.
Bt Toxin is a crystalline inactive toxic protein obtained from the soil bacterium Bacillus thuringiensis. They act against lepidopteran insect pests.
Trichoderma is a free living fungus found in many root ecosystems. It is highly effective in controlling many plant pathogens.
Nucleopolyhedrovirus belongs to the family of baculoviruses (viruses that infect insects) that is used as a virus-based insecticide to protect against pests such as potato beetles, aphids (sap sucking insects), etc.
Biopesticides are the pesticides of biological origin which are used in agriculture for the control of pests. Biological control of pests using biopesticides involves the use of natural predators of a pest species, to keep its growth in check. It aims at keeping the population size at a manageable level to maintain a sustainable ecosystem.
DDT or Dichloro diphenyl trichloro ethane is a chemical pesticide used against insect pests. DDT is a non-biodegradable persistent environmental pollutant which cannot be easily broken down by decomposers. Even if it is broken down after extensive exposure to soil microbes, the breakdown products also persist in the environment for a long time. Once consumed by living organisms, it keeps accumulating and its concentration is magnified at each successive trophic level, leading to bio accumulation.
DDT can disrupt the human endocrine system and can also induce cancers. Exposure to high doses can lead to vomiting, tremors or shakiness and seizures in humans. It can also affect the liver and reproductive system in some animals. Thus it is a highly toxic chemical whose use should be minimised.
Bt toxin, Trichoderma and Nucleopolyhedrovirus are biopesticides.
Bt Toxin is a crystalline inactive toxic protein obtained from the soil bacterium Bacillus thuringiensis. They act against lepidopteran insect pests.
Trichoderma is a free living fungus found in many root ecosystems. It is highly effective in controlling many plant pathogens.
Nucleopolyhedrovirus belongs to the family of baculoviruses (viruses that infect insects) that is used as a virus-based insecticide to protect against pests such as potato beetles, aphids (sap sucking insects), etc.
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