I got back from Iraq this spring and our lawn had been taken over by weeds. We decided the best thing to do was start again. Completely killed off the existing grasses, weeds, etc. Put in a sprinkler system, tilled, fertilized, and seeded, a hybrid bermuda (Yukon). The bermuda seedlings are coming in, however the amount of crabgrass that is coming in with them is equal to or greater than the bermuda that is coming in. The new lawn, mostly crabgrass has not been cut yet, is there anything that can be done to kill off the crabgrass without harming the bermuda. Physically pulling the crabgrass would take a small army and several full days and not an option I care to undertake.