Field evaluation on the selectivity of nine pre-emergence herbicides to cassava (Manihot esculenta Crantz)
1982
Piang, L.N. | Khelikuzaman M Hussain
Field evaluation was conducted on nine herbicides applied as preemergence at three dosages for their selectivity to a cassava clone. The effects of the herbicides on the crop were assessed on visible injury symptoms, plant height, and crop yields. Alachlor, chloramben, fluometuron, oryzalin and trifluralin were highly selective and induced little phytotoxic effects to the crop at double the recommended rates or higher. Oxyfluorfen produced some harmful symptoms at 0.25 kg/ha and above but caused no yield depression. Diuron and atrazine were partially selective and may be used at a rate of less than 2 kg/ha while isouron was non-selective at 1.0 kg/ha.
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