best herbicide approach for groundnut crops in Para involves both pre-emergence and post-emergence options. For pre-emergence, Pendimethalin 38.7% CS is effective when applied immediately after sowing to control early germinating grassy and broadleaf weeds. For post-emergence, Imazethapyr 10% SL is suitable around 15 to 20 days after sowing, especially when targeted against broadleaf weeds and sedges. If grassy weeds are dominant, Quizalofop-Ethyl 5% EC is effective at the 2–4 leaf stage.
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