The project was carried out in Moyobamba province and district, in Marona locality, in "Pabloyacu" research and Production Center, ecology Faculty- San Martin National University -Tarapoto, in the months of January to July 2014, for six months. The specific aims were, to identify and to tell the post emergent in the experimental field, during the first months of the transplanted coffee; to locate striping of plastic of colors on the soil, between the rows of the coffee plants, to determine the scrub mortality percentage in each treatment; evaluate the biomass, the density and height of the weed plant and establish a linear regression between them. The terms of reference of the raised problem were is how much the scrub percentage of mortality, in the interaction solar radiation - plastic of colors located after the transplant of coffee? The variables were: lnteraction solar radiation- pla...