barricade is an excellent pre emerge product in the spring and could be followed by trimec plus or drive herbicide in the summer. The barricade in the spring should give season long control though.
Key word here is pre-emergent products.
Crabgrass goes to seed every fall. The old plant dies out...that's the straw looking stuff left behind, and the seeds begin anew in the spring. If you are NOT putting down grass seed, which most crabgrass pre-emergent materials will also prevent from germinating, then any of the pre-emergent products will do a good job.
Reason why scotts works well is because you introduced fertilizer to perk up the grass that is already growing and crowds out the spots where the crabgrass would soon be growing if you didn't 't put down germination preventer.
Of course...in this chemically induced society, you might find that you pet's paws track this stuff in the house...not to mention the kids and YOUR big feet...I suspect that any of this stuff is not very good for you to be breathing and running around bare toed....
Therefore, you might want to get out there NOW and pull the crabgrass up bagging it and putting it out to the curb before the seed releases....this is better than a trip to the doctor because of "strangitus" to the toes, or a membership to th gym with lots of bending and bagging. But think how nice the lawn will look when your dun...and the money you saved on chemicals and the grubs and moles will thank you too.