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mascoutah, IL | Just curious. Does cobra do much of anything to giant ragweed. Spraying with powermax. I know firstrate does a good job but already using cobra for the water hemp.
Edited by dmswil 7/6/2013 22:34
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NEMO | 10 oz cobra, qt powermax, .4 pt crop oil, and about .3pt of N-tense water conditioner, all per acre. Seems to be doing a really good job on eveything so far. It is a HOT mix though! Some of these weeds were pretty big, as we hadn't worked some of this ground since last fall and couldn't go deep enough to get all the weeds. |
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McLeod County, MN | I used Flexstar GT 3.5 last year. Giant rags were about 8" tall by the time my fields were dry enough to spray. It knocked the snot out of them, turned them brown and roasted them down. Few days later they shot new growth out of the same roots. I think the cobra in Flexstar neutralized the Glyphosate and the giant rags came back just like the beans. The whole field was brown. I wont plant beans cause nobody has found me a decent chemical program up here yet. |
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| I sprayed some beans this year with 24os PowerMax, 3 pt Warrant, & 10 oz of Cobra. We were trying to get some burn flash on the beans to see if it would improve yield. Along the fence row there were some tall GRWs, probably 3 ft or so that I hit with the fence row nozzle. A week later the GRWs looked like they were dead, but I have seen them come back so will have to wait & see if they die or not. Got a real good burn on the beans as two different friends called to see what we had sprayed on the beans as they looked like they were dieing.
Years ago I had a field that Common ragweed came up thick in late June , early July. The local co-op sprayed them with 13 oz of Cobra. Beans & CRWs looked like they would burn if you threw a match in it. Everything was completely brown. That year the field made the best beans that ever came off it.
As for yield response from burn flash with Cobra. We've experimented with it for several years trying rates from 4 oz of Cobra up to 10 oz. Results have been mixed. At 4 oz we didn't get any burn & no response. One yr @ 6 os we seen approx 5 boa increase in yields but the next year no respone. Last yr we seen limited burn @ 8 oz & a small 2-3 bu yield increase. This year we sprayed part of a field when the beans were small but saw little burning. Later, sprayed with the P-Max & Warrant we gt a good burn flash on the beans. |
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| If it kills the GRW, said GRW will be deader than a hammer. In the more likely scenario, it will merely piss off the GRW, and when said GRW starts to grow anew as the other poster said, the only thing left that will kill it is cold hard steel. |
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Ethridge, TN | I read these posts, and in every one of them, R-up of some sort is still being thrown in the mix, when the kitchen sink is also being thrown in there to try and solve another problem. My question, why the heck are you limiting what the other chems can do, by putting the stupid R-up in there, cause you limited what surfactant you can add, basically crop oil ? ? ? ? ? ? Looks to me you are cripling what the chems "could" do, for what, grass control????? Generic Select will sure get the grass, and then you could run a full rate of COC, Firstrate for the GRW, and still have the Cobra for the waterhemp. Maybe I'm missing something???????? |
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mascoutah, IL | Chris, I used to run that cobra, first rate, crop oil mix about ten years ago and it would not kill giant ragweed over about 6-8 inches. I am not targeting the giant ragweed on this field. I could probably spend an hour or two and get them by hand. It was a field we could not get in early, it is conventionaly tilled and the field cultivator missed a few as I knew it would. I am targeting water hemp here and was just wondering if there was a chance it would get the few ragweed with it. Time will tell. I figured I would have to walk them anyway because the ragweed are about 18 inches now. BTW roundup still works very well for me on my conventional ground. We run a lot of continuous corn that never sees roundup followed by a year of soybeans. I still haven't seen resistant water hemp or pigweed and I don't want to so we have been running flexstar last year and cobra this year. |
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| There is no Cobra in Flexstar.
Edited by David 7/7/2013 09:00
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King City, Mo | Rotating flexstar and cobra (and or ultra blazer) is not rotating because there in the same chemical group and sub group of Diphenylethers.
http://www.ksre.ksu.edu/bookstore/pubs/c715.pdf
If you really wanna rotate go to prowl or treflan to get a different mode of action.
Some dual and metributizon also works pre and if there is carry over to corn there is no worry. Corn can have both of those applied pre to them.
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mascoutah, IL | You misunderstood me. I just meant that we are using something other than roundup alone. Would have used flexstar again but dont want to worry about carry over so am using cobra. |
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| http://www.youtube.com/watch?v=MpfMHM75EJc Right at the start of the video the fire is the pilot setting when it goes blue he has hit the 12 volt nain vavle. About 10 gals to acre. We are flamming beans now (organic) have to be very careful with growing point have burned them right to stem but will releaf but for some reason giant rag has an awful time with the fire.
Edited by hyseed 7/7/2013 10:02
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NEMO | I use rr because I still have some weeds that it will do a good job on. I'm not sure that the rr may still kill most giant rag here anyway. I used the cobra to get the twh and it helped on all the other broadleaves, apparently. I wouldn't give a bucket of piss for Select, but that's just me. |
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Central Illinois | How do you not end up with a field fire in a No-Till field ?? Maybe we should do a "controlled" burn and flash the whole field. Steve |
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nw MN | Just curious if you have kept track of the time of application when burning your beans, and what works best?? I have thought about doing that, all the world record holders do that followed up with a bazillion insectice and fungicides. Burn them early, and give them an easy life after that?I know we used to have a better average yield with conventionals than RR, and most guys attribute it to the chemical burn causing more branching, but when to spray for peak effect? Seems like once our beans start hitting the second or third trifoliate they already have flowers on them, and always thought that was a no-no to burn flowers. |
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Ethridge, TN | I can see everyone's point, and that is why I asked the question, thinking that I must be missing something. R-up has become very useless to us down here. When you have to clean up what is left, and even in the pre's we are moving farther away every year from it's use. I've got a few things it'll still work on for a burndown application, but for in crop, pretty much leave it out and going back to the old chemistry programs, so I can use the surfactant that made them work.
We have Johnson grass that you can poor r-up on straight out of the jug, and it'll take the growth off, but it will not translocate. Within a week you will have new growth out of the rhizomes. We can use Select, the generic Section, and will control the Johnson grass for the season. Went back to metribuzin/sencor in all the bean pre this year to get a handle on the broads that the R-up does no more than act as a growth stimulant. |
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Sumner GA, Located in southwest GA, | I am going to have one field with Dual Magnum, Reflex, and Basagran plus Ultra Blazer, still lack the Basagran/Ultra Blazer pass. |
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| Well Steve: In a few weeks I will let u know. Have a rye field that is wet some of it was disked down (offset), some of it was rolled culti mulcher, and some of it was flamed in the standing rye and yes that did burn but had that area disked around for fear of that happening. was going to make some sikage bales way back in May but to much rain. Planted to beans (organic) just emerging now. This is more of an experiment fieid now just way to late. |
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| http://www.mosesorganic.org/attachments/events/8.21flameweeding.pdf http://www.youtube.com/watch?v=aYwURy7C4Sw...
Edited by hyseed 7/7/2013 15:59
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King City, Mo | You can build ppo resistance by using them every year and not rotating your modes of action. |
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N FLA | Joshua, what are you doing with basagran ultra blazer? What weed? What kills coffeebean or sicklepod in conventional soybean? |
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SE IA | We already have PPO resistance here and roundup is the only thing that will kill water hemp....at this point |
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Sumner GA, Located in southwest GA, | I am mainly trying to get season control of morningglorys and going to clean up any escapes from my pre shot, since it was not perfectly clean, dont have much hope for fully controlling the pigweeds, I think I will have sprayed 5 different MOAs. Ultra Blazer at 1.5 pints and 2 quarts RUP and hi rate of NIS fried most everything in the field except for some morningglories so far as I have looked, not scouted properly yet however, problably should have spiked a little 24DB in the mix. I think conventional if you could run Gramaxone/Reflex/Dual Mag pre and Select/Basagran/Ultra Blazer or Select/Storm post you could do some damage, may take a second pass of Select, Pursuit could also be used for broadleaves without ALS resistance, works the same as Cadre. for Texas millet. I have no promises on that however. Worst come to worst could always run a hooded sprayer in rowed beans.
Edited by JoshuaGA 7/10/2013 20:36
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Cobra on Giant Ragweed
