Dormant bermuda grass has no defense against winter annual weeds other than what you offer. Making that offering around the time you begin seeing the weeds ain’t the best way to go about it. You see, the problem is they got started in September and that’s about the same time you should have got started. Apply a PreEmergent on your bermuda lawn during the early fall and you’ll nip most of the winter annual weeds I am seeing in your pictures as they begin to sprout. Plan to never see them. Well, what can you do about these wild thangs now? These are winter weeds and you’ll need a postemergent but, what you don’t see now are the weeds that are just beginning to pop. You’ll be right back in the same boat around the first of June when you start seeing the summer wild things. Use a combination Pre and Post product like Weed B Gon Max. Always read the label and apply the product accordingly. It’s the law. Finally in your third picture bottom right is our little friend Poa. Wild thang, you make my phone ring! I couldn’t resist. At this time there are products that will help but due to the expense you may want to call a local lawn care operator. Weed B Gon Max won’t help much with Poa at this point but it will definitely help with the others in your pictures. Plus, you’ll get the jump on the summer weeds that are just waiting to burst right out of the pixels in your pics. Plan to never see them. That’s the goal with successful weed control. Check out this link from Walter for a good overview of weed control in Bermuda lawns http://www.walterreeves.com/lawn-care/lawn-timing-pre-emergent-herbicide/
Oh crud, it’s time for a little self administered crow here! Weed B Gon does not contain a preEmergent. It will help in managing some summer weeds that are beginning to sprout now but it does not keep them from sprouting. I am not sure if there is a ready to spray combination pre and post emergent product available. There are granule formulations but are there liquid formulations? Groundsman in a jug would sure be a great homeowner product!