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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
Why are manures and fertilizers used in fields?
Name three most important nutrients required for plant growth.
What are advantages of using manure ?
Define manure. What are different manures and how do they affect the soil ?
Why water should be used judiciously ?
Define intercropping. How does it differ with mixed cropping?
Write about three main criteria which should be considered while selecting the crops for rotation?
What is the advantage of using insect resistant varieties?
Compare between mixed cropping and intercropping. Write down from advantage of both of these techniques.
Explain the various preventive measures against insect pests.
