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View Full Version : Weed ID please


lawncuttinfoo
07-26-2009, 06:48 PM
This weed was dormant in some hauled in topsoil that was used in a renovation. It is lighter color than the rest of the KBG and fine fescues and much faster growing. Looks a lot like a nutsedge but the stem is flat instead of triangular (has 2 sides instead of 3)

Turf Dawg
07-26-2009, 07:40 PM
Looks like Johnson grass to me since it has the purple bottom, but I do not know if you have Johnson grass in the North.

hughmcjr
07-26-2009, 11:28 PM
I think it is Orchard grass or JOhnson Grass

http://weedid.aces.uiuc.edu/


http://www.msuturfweeds.net/details/_/orchardgrass_54/

It does look like a Johnson Grass seedling:

http://weedid.aces.uiuc.edu/imgview.cfm?ImageFile=weeds/112L.gif&WeedName=*%20JOHNSONGRASS&ImageDescription=seedling&factor=0.5

lawncuttinfoo
07-27-2009, 10:41 AM
Know of a product sold at Lesco that can be used to control Johnsongrass in cool season turf?

kirk1701
07-27-2009, 02:10 PM
As per weeds go I have one I would like to know what it was?

Was because I no longer have it but never seen one like it before and thank god its gone :drinkup:

Being I no longer have it I have no pic but can describe it with seedlings on the ends of these runners that when touched would pop off and fly in every direction like popcorn?

The seed I would have to describe as thin like reg grass seed but twice as long.

44DCNF
07-27-2009, 03:58 PM
Kirk1701, check this site here (http://theseedsite.co.uk/sdforce.html), and see if you see anything familiar; maybe an oxalis.

JDUtah
07-27-2009, 04:27 PM
http://weeds.ippc.orst.edu/pnw/weeds?weeds/id/Barnyardgrass--Echinochloa_crus-galli--m.html

http://en.wikipedia.org/wiki/Echinochloa_crus-galli

http://www.montereychemical.com/label/Drive75DF.pdf

http://www.google.com/url?sa=t&ct=res&cd=1&url=http%3A%2F%2Fwww.bayerprocentral.com%2FBAYER%2FCropScience%2FBackedByBayer.nsf%2F31837D3DAC2A9C5 F852572F8004F666F%2F%24FILE%2FS%2520432-950%2520Acclaim%2520Extra%2520Herbicide%252009-09-04.pdf&ei=kw9uSqiZKo-eswOv1uDKDg&rct=j&q=acclaim+extra+label&usg=AFQjCNGUzpIbKY2xbJr381H3-NM-bKkscA

kirk1701
07-27-2009, 04:29 PM
Kirk1701, check this site here (http://theseedsite.co.uk/sdforce.html), and see if you see anything familiar; maybe an oxalis.

Nope, didn't see anything that resembled it but thanks.

44DCNF
07-27-2009, 05:04 PM
Nope, didn't see anything that resembled it but thanks.

Sorry, I didn't view the page and now see it is in the UK. Look up seed dispersal and choose a local site.

americanlawn
07-27-2009, 05:23 PM
I'm betting it's foxtail.

kirk1701
07-27-2009, 06:44 PM
Nope, not foxtail but I may have a better description with some photos I did find.

Stem and plant resembles Grass Pea (http://weeds.ippc.orst.edu/pnw/weeds?weeds/id/Grass_pea--Lathyrus_sphaericus--f.html) I remeber it having small white flowers on it and the seed that would pop off with just a touch resembled that on Hairy cress (http://weeds.ippc.orst.edu/pnw/weeds?weeds/id/Hairy_cress--Bromus_commutatus--f.html)

Don't spend too much time on this guys, like I said its went bye bye last year I think that's the one and only thing TrueGreen did do right :laugh: However I would like to have known what it was called.

hughmcjr
07-27-2009, 07:08 PM
It does look the closest to Barnyard grass, that JD Utah provided a link and pic for.

DiyDave
07-27-2009, 07:27 PM
Whatever it is, it is likely, a warm season annual, maybe barnyard grass, maybe a foxtail, or millet, maybe even fall pannicum. Definitely not orchard grass, leaf isn't folded to a steep v, wrong color.

Think Green
07-27-2009, 08:00 PM
That appears to be a young sprout of purple nutsedge. I have all the types growing around my lawn----yellow, purple, and globe! The way to tell the color is to look at the base stem. It will be either yellowish green or purple. Globe sedge is totally green and grow taller than the other variety. Since they are in the papyrus family, they are beautiful in shape.

DiyDave
07-27-2009, 08:09 PM
Nutsedge will have a triangular cross section to the stem, I don't see that in the picture. Also, nutsedge has a leaf that comes directly out, and is the same shape for its entire length. Also doesn't look like the leaf is shiny enough, or the right color.

Think Green
07-27-2009, 08:30 PM
I guess, then I will tell my netsedge to stop growing because it doesn't have a triangular shape at its stem!! LOL!
The globe sedge growing out in my ditches have the triangular shape!!
It must be of a different species or another biotype, because this weed is exact to what is growing in all of my beds and perimeter around the house.

lawncuttinfoo
07-27-2009, 10:02 PM
Here are some mature plants I found, no auricle and no ligule. Looks to be barnyardgrass. The area has a lot of fine fescue so reading the labels it looks like Acclaim Extra is the proper choice over Drive 75. JDUtah, good job and thank you.

lawncuttinfoo
07-27-2009, 11:09 PM
What temperatures exactly do you think "extreme temps" means per acclaim label?

Looks like the Acclaim will cost ~$19 ($76 per pound) to treat 7K sq ft vs. ~$12 ($112 per pint) to treat 7K Sq ft for the drive. But the fine fescue warning on the drive has me spooked.

These 2 are basically the only 2 options for me right?

I have not used either of these before, although I have used Q4 which has some quin in it like the drive but it is not labeled for barnyard grass I suppose because the % is 5.69 vs 75% in the drive.

JDUtah
07-28-2009, 12:57 AM
YW bro. And thx. :)

Can't say I have had experience with either on fescue... YET. I would say "extreme temps" includes most the day over 85/90. A couple hours over that a day, on an irrigated lawn, you are prolly fine. I would try the Acclaim first per your concern. Good luck! If you have the time and remember to, let us know what you end up doing and the results. Thanks in advance. :waving:

PS, as far as I know these are your only labeled options. Anyone know of anything else?

PSS, good job reading and understanding the labels. Shows you are one of the responsible ones.

greendoctor
07-28-2009, 02:04 AM
A lawn that is irrigated and properly fertilized will handle a herbicide application. I notice that many researchers test products on lawns that are not irrigated and receive minimal fertilization. Therefore, as long as a lawn is not dried out when I get there. I can spray it. Volatile products like ester or Speedzone are ok provided it is not humid and still.

JDUtah
07-28-2009, 09:45 AM
A lawn that is irrigated and properly fertilized will handle a herbicide application. I notice that many researchers test products on lawns that are not irrigated and receive minimal fertilization. Therefore, as long as a lawn is not dried out when I get there. I can spray it. Volatile products like ester or Speedzone are ok provided it is not humid and still.

Thanks for that. It is what I have noticed but haven't had the courage to admit (even to myself) lol

naughty62
07-30-2009, 07:26 AM
Last year we treated a simular infestation on a new lawn in a rural setting . it was muture barnyard grass stubble , It required 2 apps of q-4 .never used acclaim extra and there was not any fine fesque involved .it cost us $4.50/ k just for q-4 on two apps.giant fox tail stubble looks almost intentical.

cpa4t9r
07-30-2009, 08:46 AM
I'll say bahia - depending on if you've got thick rhizomes. Its got purplish roots too and can be flat. If Acclaim doesn't touch it, then that should narrow it down. I have a hard time distinguishing dallis/bahia/barnyard etc. if you're mowing short/frequently enough to not see the different seedheads.

lawncuttinfoo
08-11-2009, 10:45 PM
I found some new stuff looks like barnyard grass except instead of smooth ligule its a hairy ligule.