Advertisements
Advertisements
प्रश्न
Describe the biological method of weed control.
Advertisements
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
What are macro-nutrients and why are they called macronutrients?
Compare the use of manure and fertilizers in maintaining soil fertility.
Choose plant’s micronutrients and macronutrients from the following Iron, Chlorine, Sulphur, Copper, Nitrogen, Calcium, Manganese, Potassium, Zinc, Magnesium, Molybdenum, Phosphorus.
Explain, how efficiency of irrigation can be increased.
Define intercropping. How does it differ with mixed cropping?
Explain various effects of weeds on crop plants.
What are crop's pests? Suggest preventive measures to control pests.
Explain the mechanism of compost formation.
Explain various types of irrigation systems in India. How can efficiency of applied water be increased in agriculture.
Explain the various preventive measures against insect pests.
