We are receiving some summer grass samples for identification. As you know the seedlings look very similar.
PCAs have mentioned, and we can corroborate that some species respond differently to herbicides. As an example, we have seen that Sprangletop (Leptochloa filiformis) is not controlled with selective postemergent herbicides like Fusilade or Poast. We have seen only good results with a high rate of clethodim (Select), and the generics off the same active ingredient. Sandbur is also tolerant to these herbicides.
These two weeds frequently come back from crowns surviving the winter which makes spring preemergence herbicides applied ineffective.
The following are common species of summer annual grass here:
|
echinochloa |
water grass and barnyard grass |
|
leptochloa |
red sprangletop and mexican sprangletop |
|
eriochloa |
southwestern cupgrass and prairie cupgrass |
|
cenchrus |
field sandbur and red sandbur |
|
setaria |
green foxtail and yellow foxtail and |
|
chloris |
feather finger grass and truncate finger grass |
Check out the Summer Annual Grass ID publication which contains pictures and descriptive characteristics of each of these species.
