Generally, if weeds have emerged, a rotary hoe treatment will not be as effective and a secondary strategy should be considered. Also recognize that crops can tolerate considerable injury from a rotary hoe without a significant response to stand or eventual yield. Cultivation also should be done in a timely fashion on smaller weeds and at shallow depths. Lay-by cultivation may diminish the need for late herbicide applications. Importantly, the negative response of crops to later herbicide applications is more important than the weed control that might result from these treatments.
Cultivation is a better and cheaper option.
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