Review on critical period of weed competition and management in maize (Zea mays L.)

Maize (Zea maize L.) is one of the major cereal crop produced worldwide after wheat and rice mainly as food for human animal feed .maize most sensitive to weed competition during its early growth stage control an important management practice production that should be carried out ensure optimum grain yield. Weeds compete with corn plants resources such light, nutrients, space, moisture, water, especially good within first 4 6 weeks crops are planted critical in order avoid a yield reduction from weeds. The period (CPWC) cried cycle which weeds must controlled prevent losses .the maximum occurs 40 45 week sowing suggesting importance maintaining field weed. Free this competition. Weed .Weed season reduce yields more than late Although not greatly reduced by weeds, they may case difficult harvesting, low quality protein content. So, paper Review on Critical Period Competition Management Mays, L) it can minimum using method.