Any of you warm-season folks having trouble with pigweed? It sure is becoming a problem here in Zone 7. The weather has been a lot cooler than normal, so the weeds are growing while the Bermuda isn't. I have customers calling to complain about it, even though these properties have had adequate pre-emergent applied twice this year. The local experts tell me that pigweed grows in the thatch layer, therefore pre-emergents will not prevent it. Apparently all that can be done is spray with the typical broadleaf herbicide such as Threeway, Trimec, etc. Even when you do that, it seems to germinate a new crop within a few days. Is there anything that might help avoid return trips for this stuff?