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  • 24D is on the move

    Arkansas Dicamba Drift: Injury Reports Pour in Over Last 2 Weeks
    ---------------------------I bet you guys two dollars on a donut the Decima beans are BANNED next year in Arkansas------------------------------------dave

    Last season the Arkansas State Plant Board received a total of 32 drift complaints resulting from applications of various formulations of dicamba herbicide made to Xtend crops, mostly cotton.
    This year the release and approval of Engenia herbicide (an improved formulation with reduced volatility) was registered in Arkansas and coupled with more strict application guidelines which included mandatory applicator training, extending 100ft buffer zones around the entire field at application as well as a 0.25 mile downwind buffer to sensitive crops.*

    The thought during the development of these restrictions was an attempt to minimize the amount of injury from off target movement this season. Unfortunately that has not been the case.
    As of this morning (6/12/17) approximately 40 complaints from off target dicamba movement have been filed with the Arkansas State Plant Board.*
    This is up from the 32 total last year and complaints are increasing daily. To be fair numerous other drift complaints have been filed this year including Paraquat (13) and Roundup (11) but these drift events have been much more localized and at most damaging around 100-200 acres in extreme cases.*
    Dicamba complaints however have been much more widespread and may cover 1000 acres or more each time. Robert Goodson our county agent in Phillips County has estimated approximately 20,000 acres that have been affected in his county. In addition ten other counties across Eastern Arkansas have reported damage.*

    Last Thursday over 7000 acres of drift was reported in Mississippi County which included most of the soybean research at the Northeast Arkansas Research and Extension Center at Keiser. Calls from Jason Bond my counterpart in Mississippi indicate that dicamba damage is also widespread on soybean fields throughout the delta of Mississippi.
    So what happened? Many thought that the improved formulations of dicamba would effectively decrease if not eliminate off-target issues that we saw in 2016. This has not been the case.*
    Arkansas regulations required all applicators or anyone that would be spraying dicamba to take and pass an applicators exam that covered all requirements for use in the state of Arkansas. Over 1000 applicators took and passed the required test and were educated to know the application requirements and the risk.*
    The biggest problem is the sensitivity of non-Xtend soybean to dicamba herbicide.*
    As we have seen in our research, a very low rate (1/30,000X) of dicamba can cause soybean leaves to cup.* No, there will not be any yield lost at this low of a rate, but you will still see the injury on the beans.*
    Although most growers and applicators took the training, some still decided to spray with the wrong nozzles, high winds, disregarding the buffer zones, or at night during a temperature inversion. This physical drift accounts for at least 80-90% of all the dicamba injured fields that I have personally walked. The other 10-20% is not that easy to figure out.*
    There are some growers/applicators that had the correct sprayer setup, measured off the appropriate boarders, and sprayed Engenia when the wind was blowing away from susceptible soybean, in some cases with a broadcast hooded sprayer.*
    These are the fields that have me scratching my head wondering how on earth the dicamba symptoms appeared 0.25 mile up-wind. Really there are only two conclusions that I can come up with. Either there was a small amount of volatility that occurred, but enough to cause some symptomology, or another theory might be that the dicamba droplets are moving on dust particles after the application is made.*
    I am seeing more and more evidence in the field that points me towards movement with the dust. I don’t know how we can steward a dicamba herbicide moving forward that is so sensitive to non-tolerant soybean cultivars. It is evident that even when applications are made correctly, sometimes that is not good enough.
    The main questions after injury is observed are, what can I do? And how much yield is lost? The first thing you should do if you suspect dicamba injury from off-target movement is call the Arkansas State Plant Board. This will provide an official record of the complaint.*
    There is nothing you can do or spray on the soybeans once injury has occurred to speed up metabolism and reduce any potential yield losses. Depending on the temperatures and growth stage, it can take up to 3 weeks to see the full symptoms from the dicamba drift.
    Last year I wrote a blog on yield effects based on rate and timing of dicamba injury, it can be found by clicking this highlighted sentence.* Most of the injury I have walked appears to be lower rates of dicamba drift at young vegetative growth stages. This should result in minimal if any yield losses.*
    There are some drift cases where soybeans were around R1-R2 and injury suggested higher rates were received. These are the fields that could potentially expect 10-15% yield losses. If the rate of dicamba causes the terminals to turn towards the ground at V6-R2, higher yield losses may be observed.* *
    I also put together a blog last year regarding late season dicamba effects on sensitive soybean and offspring, it can be found here.
    I have heard some say that all dicamba (Engenia) applications should be banned immediately. The problem with that is there are large acreages of Xtend soybeans purchased and planted in good faith that there would be a herbicide to spray over-the-top for pigweed control.*
    Reports of lower than adequate control with Engenia have been spread this year but when Xtend is planted it is the only option where PPO-resistant pigweed is present.

  • #2
    I forgot to mention a off label treatment if proven carries a fine of $25000 per infraction the label here has TEETH--------------------------------dave


    • #3
      Did you type all that?


      • #4
        24D is not dicamba, some fkrs can NOT read or follow label, in Kansasss, if the product moves off label, even following label, applicator is responsible. I "love" it when the NON
        gmo crops get run over with glos and of course the farmer forgot to mention that fact...of course, with the winds we have had the last few days, and I saw more than one sprayer
        running yesterday....hope their neighbors were still in bed when the sprayer finished...when you can smell a "product" from the road and a couple passes away from the edge, some
        off target is happening!


        • #5
          Doom and gloom! and now 24-d = dicamba? WOW


          • #6
            Marco my typing skills have improved from the time I came to Agweb back in the early days when this place was 24-7 but no it was easer to cut and past --------------------------------------dave


            • #7
              the problem here in this area the Humidity is the problem I see they are trying to blame Dust IT is probably the combo of the two this serious stuff it will effect the whole US -----------------------------------------------------------------------dave


              • #8
                Hey dennis. If I smell the neighbors pig or cow chit does that mean they spread it on my side of the fence?

                I sprayed all my corn with a tank mix that had good old fashioned Banvel in it again this year, I had no problems. I use 20 GPA of water, low spray pressure, and a heavy dose of a deposition agent. And I was spraying dicamba when you should...before most the soybeans are emerged.


                • #9
                  I've always heard that odor is added to some chemicals so people will know the fields were sprayed and stay out , or take proper precautions before entering it .


                  • #10
                    We dont' have to worry about anyone burning out chit down with chemical drift here. Mother Nature is one step ahead of the sprayer with the burndown.


                    • #11
                      Originally posted by 82 View Post
                      Hey dennis. If I smell the neighbors pig or cow chit does that mean they spread it on my side of the fence?

                      I sprayed all my corn with a tank mix that had good old fashioned Banvel in it again this year, I had no problems. I use 20 GPA of water, low spray pressure, and a heavy dose of a deposition agent. And I was spraying dicamba when you should...before most the soybeans are emerged.
                      would depend on what size of tips and pressure they were "spraying" the chit 82! lol

                      and Yes, WIND, TEMPERATURE and HUMIDITY.

                      Direct drift is one thing, inversion is something else that some fail to think about, but let it happen to you just once and you will become more understanding.

                      PLEASE read and follow the label directions, hell, even ask someone who might know if it doesn't make sense!


                      • #12
                        spray regg state 20 gal per acre 20 psi num4 lv tips 100" border quarter mile border down wind no spraying in wind over15 mph spray rig not to move if wind over 20 no spraying after dark mornings spraying only must couplet spraying training to be certified in Decima any off label spraying to be subject to a $25000 fin per infraction ----------------------------now all this training and all and we already have 40 infractions 35 last year ----Houston We Have a Problem ????????????---------------------------------------------------------------------------dave


                        • #13
                          I've experienced the whole inversion thing spraying Status one year. There was even a light breeze blowing away from the neighbor the day sprayed. As a matter of fact, the neighbor stopped by the water truck and we joked and BS'd while I reloaded about how we shouldn't have to worry about drift...boy were we wrong.

                          I hauled my neighbor a gravity box load of soybeans in the fall.

                          That's why I quit spraying the new "safer" version of dicamba later in the season, and went back to spraying the old "less safe" form and spray early in the season. The weeds seem to like our old way of spraying a lot less than the new way also, that's not a bad thing.
                          Last edited by 82; 06-14-2017, 06:38 PM.


                          • #14
                            Maybe it's an Arkansas problem, all the brains in the ONE

                            and with the NEW dicambia label with very few tank mixes....because of the molecular structure getting changed back to banvil structure when mixed with other chemicals, especially glos the least, is what we keep getting told.

                            82, do you think maybe the soil surface temperature can be a factor with inversion(notice and didn't refer to the 2 in or 4 in), might get complicated for ECI...oh, that was a question ?


                            • #15