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प्रश्न
What are crop's pests? Suggest preventive measures to control pests.
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उत्तर
Crop's pests are the organisms that destroy the growing crop plants by causing great economic loss. There are various pests of crop plants such as weeds, insects, mites, rodents, fungi, bacteria, and viruses.
Crop's pests can be controlled by following measures:
(i) Use of pesticides (insecticides, weedicides, and fungicides) that kill the insects, weeds, and fungal pests.
(ii) Use of resistant crop varieties.
(iii) Crop rotation and multiple cropping.
(iv) Clean cultivation.
(v) Sowing crops at optimum time.
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संबंधित प्रश्न
What are macro-nutrients and why are they called macronutrients?
Name three most important nutrients required for plant growth.
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Give two limitations of using manure.
Explain the term eutrophication with suitable example
How does chemical nature of the soil change due to continued use of chemical fertilizers ?
Explain the methods of controlling insect pests.
Give two examples each of
(a) Narrow leaved rabi season weed.
(b) Broad leaved kharif season weed.
Explain the mechanism of compost formation.
Cultivation practices and crop yield are related to environmental conditions. Explain.
