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Implement Alley Discussion Forum

Getting rid of johnsongrass?

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Paul

05-09-2004 11:23:04




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There's a tennis court sized patch of johnsongrass in my dove field that's planted with sunflowers. The flowers are only an inch high, but the j-grass is about 4-8" high. In the last 2 months, it's been disked several times and has been treated with trifluralin.

What's the best way to get rid of them permanantly with one treatment?

I have...
a spot sprayer.
Plenty of 41% glyphosate.
A bottle of sethoxydim concentrate.
A spray bottle of ready-to-use stuff that contains diquat dibromide, dicamba, and fluazifop.

I also have adjuvants and surfactants to add to the glyphosate.

I also have one of those flame burner torch kits that attach to LP tanks. These are specifically made for killing grass.

So what would you recommend? Glyphosate? Sethoxy? The diquat/dicamba/fluazifop solution? Or a flame? Or another method?

I just want to kill it with one treatment.

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Chip S.

05-10-2004 06:13:17




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 Re: Getting rid of johnsongrass? in reply to Paul, 05-09-2004 11:23:04  
I have used Roundup with some success (I don't think anything is TRULY successful against this stuff)by applying it with a wick applicator when the johnsongrass is proud of the rest of the crop, but prior to it heading up. It knocks it back pretty good, but nothing really gets rid of it. I like the hogs idea. Got some new city folks who moved into the McMansions going up around here who take exception to the way I make a living. Just wait till I fertilize with liquified turkey manure...

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Bus Driver

05-10-2004 04:42:15




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 Re: Getting rid of johnsongrass? in reply to Paul, 05-09-2004 11:23:04  
No doubt you know that the glyphosates are effective under certain growing/weather conditions and not with others. A sterilant such as Pramitol should work, but leaves the soil dead for a year or so. No one-shot treatment will work, this will be a process over time.



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riverbend

05-09-2004 20:48:40




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 Re: Getting rid of johnsongrass? in reply to Paul, 05-09-2004 11:23:04  
You might try getting a hold of Don Wyse at the UofM in St. Paul. He is a weed scientist. I think he helped develop Poast. Knowing when johnsongrass is weakest might help get rid of it in one treatment. Flame weeding seems to work better on broad leaves.



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kyhayman

05-09-2004 18:19:51




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 Re: Getting rid of johnsongrass? in reply to Paul, 05-09-2004 11:23:04  
Given those choices I'd use the Roundup but you'll have to accept the loss to the crop where you use it. I've had really good luck using Poast to control Johnsongrass. I heard it is off the market this spring, I dont know that for fact though, it is off BASF's wed site. Fusilade was supposed to be a good alternative, if its gone that's probably what I'll switch to.



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John A

05-09-2004 17:04:27




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 Re: Getting rid of johnsongrass? in reply to Paul, 05-09-2004 11:23:04  
Paul, There is no one treatment application of chemical that will kill Johnson Grass, short of a soil sterilent that will kill the ground for a few years.
Roundup will do the best job of control to eradication, surfacants and red dye markers will help in kill and in your application.
Do not use Roundup L&G. You will not be satisfied with the results. Get the regular formulation of Roundup or equivlent, mix to the desired strength
you want and get after it.
OBTW....You could go to the local auction barn...get a few hogs....deep plow the area....fence it off and put the hogs in...and in no time the hog will have rooted out and have eaten the roots.....violah....no more johnson grass. Just a thought! I have seen it done.
Later,
John A.

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Mark

05-09-2004 13:32:23




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 Re: Getting rid of johnsongrass? in reply to Paul, 05-09-2004 11:23:04  
It's going to be hard to kill it all with one treatment. You can spot spray it now to knock it back and maybe keep it from spreading.If any grows to a seed head,cut the head off before it goes to seed ,soak them in diesel,and burn them. The best time to completely irradicate it is in the fall,do a complete burndown of the entire plot,when you spray it then it takes the herbicide in and transfers down to the roots and rhizomes. Everytime you disc, it is spreading it farther. Keep a watch on it,it spreads like wildfire and depending on your location you can be fined as it is considered a noxious(sp) weed.

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pappyatlaw

05-10-2004 17:02:59




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 Re: Re: Getting rid of johnsongrass? in reply to Mark, 05-09-2004 13:32:23  
I've attempted the fight with Johnson Grass in the dove fields with a hand sprayer and a potent mix of Roundup. Lots of walking and a lot of spraying. Never completely won the battle.



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