Advertisements
Advertisements
प्रश्न
Explain the importance of biopesticides in organic farming.
उत्तर
Biopesticide is a term used for bacterial and fungal toxins which can be used to destroy pests/pathogens/insects and can be directly integrated into the plants. The special characteristics of biopesticide is that they do not harm the plant or other organisms except its target organism. Some of the examples of biopesticides are:
-
Bacillus thuringiensis (Bt) is used to control butterfly caterpillars. This bacterium is available in sachets as dried spores, which are sprayed on the crops. The spores get into the gut of the larvae and kill it while the other insects remain unperturbed.
-
By methods of genetic engineering, the genes of B. thuringiensis responsible for killing the larvae have been incorporated into the plants. Cotton plant with Bt gene incorporated is called Bt-cotton.
-
The fungus Trichoderma living in roots of plants acts as a biocontrol agent against several plant pathogens.
- Baculoviruses, particularly genus Nucleopolyhedrovirus are also used as narrow spectrum insecticidal agents.
APPEARS IN
संबंधित प्रश्न
What are antibiotics?
A) Lack of management of which factor is shown in the picture?
B) How can that factor be managed with the help of microbes?
C) How the oil spills in oceans are cleared?
Why is it necessary to ban the use of plastic bags?
Give scientific reason.
Enzymes obtained by microbial process are mixed with detergents.
Salts which can be used as supplement of calcium and iron are obtained from ______ acid.
Explain the uses of micro-organisms.
Find an odd one out.
Spinosad is a biopesticide.
Write a short note.
Land filling sites
How is soil pollution controlled by microbes?
What is the use of antibiotics to human and other animals?
How microorganisms are useful in the field of medicine?
State whether true or false. If false, correct the statement.
Rhizobium, associated with root nodules of leguminous plants fixes atmospheric nitrogen.
Agaricus is a biocontrol agent.
How are microbes useful in the industry?
Baker’s yeast is ______.
In the process of making bread the carbohydrates in the flour are fermented by baker's yeast and sugar is transformed into carbon dioxide and ______.
In the process of making bread the carbohydrates in the flour are fermented by baker's yeast and sugar is transformed into carbon dioxide and ______.
Complete the given paragraph by filling the blank spaces from the options given in the bracket:
[oxygen, pyridines, mechanical, CO2, petroleum, fatal, polyester, norcadia]
Spilling of ______ oil occurs in ocean due to various reasons. This oil may prove ______ and toxic to aquatic organisms. It is not easy to remove the oil layer from surface of water by ______ method. However, bacteria like pseudomonas spp. and Alcanovorax borkumensis have to ability to destroy the ______ and other chemicals. Hence, these bacteria are used to clear the oil spills. These are called as hydrocarbonoclastic bacteria (HCB). HCB decompose the hydrocarbons and bring about the reaction of carbon with ______. ______ and water is formed in this process.
