Improvement in Food Resources — Science STD 9 — Question
Rajasthan BoardEnglish MediumSTD 9ScienceImprovement in Food Resources3 Marks
Question
Explain various methods of weed control.
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Answer
The various methods of weed control are:
Mechanical methods: These include uprooting, weeding with trowel or khurpi, hand hoeing, interculture, ploughing, burning and flooding.
Cultural methods: This includes the proper bed preparation, timely sowing of crops, intercropping and crop rotation.
Chemical methods: Herbicides and weedicides are sprayed on weeds to destroy weeds like- 2, 4 - D.
Biological methods: Biological method of weed control involves the deliberate use of insects or some other organisms which consume and specifically destroy the weed plants.
Example: Opuntia can be controlled by using cochineal insects in Maharashtra.
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