Advertisements
Advertisements
Question
Describe the biological method of weed control.
Advertisements
Solution
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
RELATED QUESTIONS
Choose plant’s micronutrients and macronutrients from the following Iron, Chlorine, Sulphur, Copper, Nitrogen, Calcium, Manganese, Potassium, Zinc, Magnesium, Molybdenum, Phosphorus.
What is green manuring ? Give suitable examples for green manures.
Explain why a legume crop does not require nitrogenous fertilizers ?
How does excessive irrigation lead to soil salinity ?
Why water should be used judiciously ?
Explain the objectives of mixed cropping.
Distinguish between mixed cropping and intercropping.
Give two examples each of
(a) Narrow leaved rabi season weed.
(b) Broad leaved kharif season weed.
Explain various effects of weeds on crop plants.
Explain the mechanism of compost formation.
