I believe the Lexar is a higher atrazine content form of Lumax..and I have had good results with Lumax. The real bonus..is the increased burndown you get with it if you're using it on no-till. Adding some glyphosate with it..and maybe just a little 2,4-D...and you've really covered everything that might possibly be growing out there. As for it's residual...I'd say it's right on par with the rest of the pre-mixes...they work good if you get the rain to incorporate...but aren't worth a darn if it doesn't rain for 10 days after you apply them.
