WEED INTERFERENCE IN COWPEA (VIGNA UNGUICULATA) IN NORTHERN MINAS GERAIS, BRAZIL by Claubert Wagner Guimarães de Menezes

“…The main weeds found were Cenchrus echinatus, Panicum maximum, Eleusine indica (Poaceae), and Amaranthus retroflexus (Amaranthaceae). The period before interference (PBI) occurred up to 9 days after emergence, the total period of interference prevention (TPIP) occurred up to 23 days after emergence, and critical period of interference prevention (CPIP) was observed between 9 and 23 days after emergence. …”
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