Advertisements
Advertisements
प्रश्न
Describe the biological method of weed control.
उत्तर
Biological methods of weed control are described below:
- Introducing the insects or some other organisms in the field that specifically consumes and destroys the weed plants.The best Indian example of biological control is eradication of prickly-pear cactus (Opuntia) by using the cochineal insects in Maharashtra and Tamil Nadu.
- Using grass carp (a freshwater fish) to destroy the aquatic weeds.
APPEARS IN
संबंधित प्रश्न
How do plants get nutrients?
Distinguish between micronutrients and macronutrients. Give suitable examples.
Compare the use of manures and fertilizers in maintaining soil fertility.
What are fertilizers ? Classify fertilizers.
Explain why a legume crop does not require nitrogenous fertilizers ?
Why is irrigation essential ?
Write down disadvantages of crop rotation.
Give two examples each of
(a) Narrow leaved rabi season weed.
(b) Broad leaved kharif season weed.
Explain the mechanism of compost formation.
Explain what will happen if in a cultivated field only manures are supplied and in another field only fertilizers are supplied, keeping all other conditions similar.
