Crescimento, fisiologia e produtividade do milho em resposta a métodos de controle de plantas daninhas.

Abstract

The influence weeds of the growth and development of corn cultivation and its control can intensify the productivity. The objective of the study was to evaluate the growth, physiology and yield of maize in response to methods of weed control. Hybrid triple transgenic maize cultivar 2BC55HX was used. The experiment was performed at the Center for Science and Agrifood Technology, Federal University of Campina Grande, CCTA / UFCG, Campus de Pombal, during the months of November 2013 to February 2014. The experimental design was a randomized block with eight treatments and four replications. The treatments consisted of eight methods of weed control: witnesses without control (WC); Mechanical control with hoes (MC); integrated control with mulch and herbicide Atrazine (ICCQ); cultural control with mulching with crop residues of maize and cowpea (CC); integrated control with weeding and herbicide Atrazine (ICWA); chemical control with Atrazine (CCA); chemical control with blend of the herbicides Atrazine + Soberan (CCAS); and integrated control with mulch assigned to the mixture of herbicides Atrazine and Soberan (ICAS). The growth characteristics were not affected by control methods. Among yield components only the spike length, and productivity were affected by the methods of handling, where the MC treatment led to better productivity. The witnesses without control (WC) reduced in 49.19% productivity. Therefore, the productivity and physiological aspects of maize are affected by the methods of weed control.