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प्रश्न
Organic farmers prefer biological control of diseases and pests to the use of chemicals for the same purpose. Justify.
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उत्तर
Biocontrol means using biological methods to manage plant diseases and pests. Pathogens, pests, and weeds are the main threats to agriculture. Traditionally, they are controlled with insecticides and pesticides, but these chemicals are highly toxic and harmful to humans and animals, and they pollute the environment. Therefore, modern agriculture increasingly relies on biological methods to manage them. Different microbes are used as biocides to control microbial pathogens (such as viruses, mycoplasma, bacteria, and fungi), insect pests, nematodes, and weeds.
Examples of biocontrol agents include:
- Bacteria: Bacillus thuringiensis
- Fungi: Trichoderma
- Insects: Ladybird beetles and dragonflies
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संबंधित प्रश्न
What is mycoherbicide?
What is a GMO?
List any five possible advantages of a GMO to a farmer.
Explain the term biofortification.
Answer the following question.
List one advantage and one disadvantage of an apomictic crop.
GM crops especially Bt crops are known to have higher resistance to pest attacks. To substantiate this an experimental study was conducted in 4 different farmlands growing Bt and non Bt-Cotton crops. The farm lands had the same dimensions, fertility and were under similar climatic conditions. The histogram below shows the usage of pesticides on Bt crops and non-Bt crops in these farm lands.
- Which of the above 4 farm lands has successfully applied the concepts of Biotechnology to show better management practices and use of agrochemicals? If you had to cultivate, which crop would you prefer (Bt or Non- Bt) and why?
- Cotton Bollworms were introduced in another experimental study on the above farm lands wherein no pesticide was used. Explain what effect would a Bt and Non Bt crop have on the pest.
Maize grain is a fruit known as ______.
Golden rice is ______.
Many proteins are secreted in their inactive form. This is also true of many toxic proteins produced by microorganisms. Explain how the mechanism is useful for the organism producing the toxin?
What are the various advantages of using genetically modified plants to increase the overall yield of the crop?
