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प्रश्न
What’s the solution?
We have to remove insects from the grain without using insecticides.
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उत्तर
- Let the grain dry in the sunlight. The harsh sunlight does not allow eggs and caterpillars to grow in the grain.
- Keep dried neem leaves in the container in which the grains are stored. Neem acts as a repellent for insects.
- Grains like beans are smeared with mud. The mud particles keep the weevils away from infesting the grains.
- The place where grain is stored should be cool and dry. It should be airy. The chances of insect infestations are less in such storage places.
संबंधित प्रश्न
Which one term in the following includes the others?
air, flora, fauna, environment, water, sunlight, soil
Fill in the following blank with suitable word :
The science that deals with the inter-relationships of living things with one another and their environment is called...........
Name the organisms whose uncontrolled activities are damaging the environment.
Write the percentage of solar energy captured by the autotrophs.
In the course of your observations, did you notice any signs of the presence of living things, though the living things themselves were not seen? For example, did you notice any partly eaten fruits or shells, fallen feathers, animal tracks, dung, droppings, nests, cocoons, eggs, honeycombs, etc.?
Which one of the places you visited shows greater biodiversity?
Micro-organisms form a part of the environment.
What are the different purposes for which fuels such as petrol, diesel, kerosene, natural gas, coal, and wood are used?
Classify the following as natural or man-made.
Soil.
Classify the following as natural or man-made.
water hyacinth.
Classify the following as natural or man-made.
book.
Classify the following as natural or man-made.
pen
_______ is the process of converting waste materials into new materials.
These are abiotic factors.
- Sunlight
- Bacteria
- Air
- Plants
Excessive exposure of humans to UV-rays results in
- damage to immune system
- damage to lungs
- skin cancer
- peptic ulcers
Select the mis-matched pair in the following and correct it.
What are the by-products of fertiliser industries? How do they affect the environment?
The abiotic factors are the non-living parts such as sunlight, air, water, and minerals in the soil.
