MERA 71, GLYPHOSATE 71%, HERBICIDE, BROAD SPECTRUM, WEED CONTROL MERA-71 Technical Name: Ammonium salt of Glyphosate 71% SG Excel Mera 71 is a systemic, broad spectrum, non-selective, post-emergent, herbicide. Excel Mera 71 gives complete and speedy control of hard to kill annual and perennial weeds. #Mera71