English to Spanish Science Agriculture seed breeding

Se trata de una fase. En el glosario pone plantacion pero no me acaba.
"Combing Deadweed and Other Herbicides.
During the phase in period of Deadweed alfalfa little consideration will probably be given
to other herbicides into the management system, particularly during the ***stand establishment***
phase. Farm Advisors testing did not demonstrate a need to combine other herbicides since all
the weeds were controlled with glyphosate."