- In the fourth week farmers have to visit the field on a regular basis, if they find any unwanted plant of weed other than sugarcane then plow it.
- In the fourth week farmers have to spray herbicide like 2-4D @ 1 ltr/acre + atrazine 1 kg/acre in 500-600 liters of water if the farmer does not use pre-emergence herbicide.
- Manual hoeing is also done in the fourth week.

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