Weed Identification

Can someone help me out with what this weed is? I sprayed my soybean plot with roundup about 3 weeks ago and killed most of the weeds in the plot, but these don't seem to have been affected. I was think maybe it's waterhemp but I'm not sure.

 

Not sure....no picture is coming up???

 

Need a pic.

 

Googled "water hemp image"
Returned this...




You're welcome,
your friend,
The Internet.

 

I didn't see the picture but just make sure it isn't wild parsnip. I have a lot of it growing around my place even in the lawn and it can really burn you if you get the juice on your skin and the sun is out. I have a neighbor who doesn't mow a field and it took hold and now goes to seed and spreads everywhere. It is a real bad invasive plant with a rash that is worse than poison ivy. It looks like a fern in the first year then during the second year looks like a green queen anns lace and gets 4 to 8 ft tall and will flower and then spread. It likes grown up fields and road edges. If you dig it up it has a big root similar to a parsnip. Got to get all of it to kill it.

 

Let's try this again.


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Mr. Skywalker, meet Mr. Waterhemp.
Enjoy the bane of farming.

You can spray with Prefix over the top.

 

Thanks, that's kinda what I thought. I've already sprayed roundup twice this year and I'm not sure I want to drive through the beans again. I have pretty wide tires and since I just broadcast I lose beans every time I have to drive through them. I think I may just leave it alone this year(it's been in the field the last few years). Then next year, I will probably add Prefix to my herbicide treatment for the field. Do you have any recommendations for the best way to go about it?

 

That looks thick enough to smother out your bean plot, you'd be better off taking the run over loss if you want a food plot of beans. That crap gets 6'+ tall.

I don't recall the rate of Prefix, I think it's 8oz/acre over the top. I think it costs around $14/acre for the spray and it has residual. May not clean it all out 100% but it would save the beans. I don't recall the exact rate because I've not sprayed mine with it yet this year, I put down dual magnum and sencor and it did a good job of keeping things clean up to now but I'll have to make another pass with the prefix yet in the next couple of weeks. There are other options but this is what I use and know. I also use some Authority XL but it's a pre-emerge and it's expensive. It has to be put down with the final burn down before bean emergence. There's also Cobra and Blazer, Synchrony and Classic, all decent options.

P.S.
Correction, the rate I used last year I believe was a 1.5 pints per acre over the top. It burns the beans but they grow back out of it pretty easily.

 

Prefix preemerge is one of the best there is. Never used post. Trying to kill waterhemp over 4" tall with just about anything will usually be a losing battle.

Edit: I use 2pt of Prefix down. The authority products are all very good.
Flexstar, Cobra, Battlestar (generic flexstar) will do a very good job post but don't spray them after flower or you'll likely lose yield.

I wouldn't use prefix pre and a flexstar post though as they are the same active ingredient. Dicamba (although has a bad name from idiots down south) has done a very good job post emerge here if you have the Xtend trait in your beans.

 

I had an 18 acre field last year I sprayed Prefix over the top of after they started blooming and they still made about 45 average. They got so weedy I didn't have any choice.

 

Oh I don't doubt that at all just wouldn't recommend to anyone. Food plots it likely wouldn't matter enough if a guy needs a last resort.

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I switched to Liberty Link Corn and Soybeans for our Missouri plots just because of the waterhemp problems. Waterhemp is not resistant to Liberty as of yet!

I have tried prefix, flexstar, Cobra and cadet over the top in waterhemp infested beans with poor results because the waterhemp was already to tall. It is always to tall, since it can grow up to 6" in a day. The water hemp in your picture is already off label, you will have poor results as well. But the bad part was, it left a bad taste to the beans spraying over the top with those products, the deer did not hammer the beans as usual come fall and winter.

 

Liberty is a great product that hasn't been screwed up over the landscape; yet!

 

Thanks for the info, the local dealer sells liberty link beans as well I believe. Maybe I will give them a shot next year, but dayum, that Liberty herbicide is expensive.....

 

Lol, check the price of the beans. I guess that's a non-factor for a couple acres of food plots but you don't want to plant a few hundred acres.

 

Well, like everything cost is a factor but I want to get rid of this damn waterhemp. Any thoughts on a good way to eliminate it from the field for good? Even if I have to go a season without planting and just burn down the the whole field a couple times over the summer, I'd consider it.

 

Not that I know of, we all have the same problem. My approach this year is a three pass herbicide program and so far I'm doing okay but I still have quite a bit coming in. The stuff is a real ***** to deal with, it's tough as hell, produces a crap ton of seed and the seed is like course dust...it's a real problem. Once you have a crop of it, you have a multi year seed bank and the seed travels readily on everything from animals to vehicles so there's basically no getting rid of it. The Liberty link crops seem to be the best bet so far to stay clean but it's not perfect and it's expensive but everything is.

For food plots the best way to fight it is probably to get away from beans and go to clover or alfalfa, etc... Seems like we are turning into a chemical factory trying to grow a damned bean. It's frustrating.

 

RR and Liberty Link Beans are about the same price. Generic Liberty is around $6/acre to spray. Generic Roundup is around $3.

$3 per acre more to help combat waterhemp? I know farmers that would give their left nut to get their waterhemp under control for $3 more.

 

Dreading the day we need to do that. Still one pass here and maybe an occasional rescue treatment of a PPO.