Herbicides like petrichlor mixed with 20 kg/acre sand and applied to the rice field. Is it a good practice?? If not suggest way of application rather than spraying.
Any herbicide has to be mixed with 50kg of dry sand on the day of application (3 - 4 DAT) and applied uniformly to the field with thin film water on the 3rd DAT. Water should not be drained for next 2 days from the field (or) fresh irrigation should not be given.
It is a general practice in north India in paddy growing areas. Pre-emergence herbicides like butachlor and pretilachlor are applied as sand mix in standing water with in 3-4 days of transplanting for uniform distribution in paddy field. Special precaution for not applying any irrigation for next 3-4 days.
Usually Pre- emergence herbicide suspended in water and spread in the rice field.
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