Palmer Amaranths

Palmer Amaranths

Agronomic life as we in north central Oklahoma have known it has shifted… changed, this summer.  Glyphosate resistant Palmer Amaranth pig weeds have popped up all over Garfield, Grant, and Kay counties.

In the summer of 2013 we had verified them in two fields within close proximity to one another in Grant County. I knew of none in Garfield.  This year they are spread throughout both counties as well as some in Kay County.  How did they do that, this quickly?

The members of the pigweed family that have a significant presence in our part of the world are:  Water Hemp, Prostrate, Red Root, and (probably the worst and most common) Palmer Amaranth. Water Hemp has been glyphosate resistant for a number of years now and although we do have them they have not had as numerous or prolific numbers in most of our fields as has the amaranth.  We already had atrazine and SU resistant amaranths, now the amaranth is glyphosate resistant.  Let that sink in a moment.

Distinguishing between the different pigweed species can be difficult especially when they are seedlings.  Some of the characteristics of amaranths are a rough raspy seed head often over a foot long, a long petiole (the structure between stem and leaf) usually longer than the leaf itself, a single barb like hair at the tip of the leaf, and often a chevron shaped water mark on the leaf itself.  However not every amaranth has all these features all the time.  Sometimes they may have one, two or all, sometimes none can be found.

Palmer Amaranths produce hundreds of thousands of seeds per plant, can emerge from at least May to September, and are able to grow at times in their life cycle up to 3 to 4 inches per day. As they gain in height they can have over a hundred growing points from which they can start growing again if not completely destroyed.

The advent of glyphosate resistant amaranths probably has the most significant impact in our area in soybeans. It has been found that amaranths can reduce soybean yields up to 79%.  I have seen them make the crop unharvest able, thus leading to 100% yield loss.  Until this summer you could basically control Palmer amaranths with glyphosate, so most producers with RR Ready soybeans just applied some form of glyphosate on their soybeans and that was the extent of their chemical program.  Not anymore.  Mother Nature wins.

What do we do now?

  1. Plan ahead with your rotations.  Perhaps you shouldn’t plant soybeans in a field that has a history of high pigweed populations.  Go to winter crops such as wheat or canola, or a summer crop of corn if you have acres that will produce corn.  There are more chemical options for control of amaranths in corn.

  2. Start clean.  Eliminate as many weeds as possible while you have the opportunity to use growth hormone chemistries such as 24Ds and or dicamba.

  3. Give yourself time.  You often have to allow time depending on the chemicals used, between applications and planting to allow the chemicals to breakdown so they will not interfere with seed germination. Spur of the moment decisions to plant beans into wheat stubble can often times lead to weedy messes.

  4. Use pre-emergents.  There are no chemicals to apply on post emerged soybeans that have good efficacy on large pigweeds.  IF the pre-emergent chemical gets activated by rainfall it seems to significantly reduce the pigweed population.  I have seen them come through the chemical barrier but usually at much reduced numbers.

  5.  Use all adjuvants and additives called for at the correct rate.  If the chemical label ask for ammonium sulfate at 17 pounds/hundred gallon solution, with a methylated seed oil, then put them in!

THE MOST IMPORTANT POINT!  Not just on pig weeds but on all weed control.

  1.  Get them while they are SMALL.  Be timely with your chemical applications.  All the chemicals you are using out there list chemical rates based on weeds that are 2 to 4 INCHES tall.  You are off label every time you spray the chemical on weeds larger than 4 inches.  If the weed is 48 inches (4 foot) tall do you put on 12 times the label rate? There are post emerge chemicals other than glyphosate, for soybeans, that have good efficacy on 3 to 4 inch pigweeds.

In my entire career in this industry I have never seen weeds so out of control over basically all of our farmland as has been the case this summer.  Our extremely heavy reliance on chemicals without the knowledge of how to use them properly and timely might have led to this.  Yes, we have had unusual weather and a strange harvest, but as an industry (producers and suppliers) we can and must do better.  We are going to have to or Mares tails, Water Hemps, Palmer Amaranths, Rag weeds, Kochias etc. are going to be our crops in the future.

We can do this, but we will need to tighten our management.

P.S. Palmer Amaranths are edible, maybe we can eat them.

                  

Palmer amaranths in Garfield County soybean field after two separate applications of 1 pound active ingredient of glyphosate.

35 comments (Add your own)

1. Gerald Wynes wrote:
Amen, Brother!!!

Sat, August 16, 2014 @ 9:48 AM

2. Ellfale wrote:
Acquistare Finasteride Propecia [url=http://ciali5mg.com]cialis 5 mg best price usa[/url] Canada Pharmacy Online Dosis Maxima De Kamagra Dapoxetina Romania

Mon, June 4, 2018 @ 6:57 PM

3. gtaletjfoa wrote:
[url=http://bakerssign.com]cost of levitra vs viagra[/url] levitra grapefruit http://bakerssign.com

Sun, August 5, 2018 @ 5:47 PM

4. gtaletuqwd wrote:
[url=http://baymontelreno.com]buy cialis with prescription[/url] cheapest cialis online http://baymontelreno.com

Sun, August 5, 2018 @ 6:40 PM

5. btaletfjdm wrote:
[url=http://bakerssign.com]levitra information[/url] levitra for pe http://bakerssign.com

Tue, August 7, 2018 @ 12:54 PM

6. ytaletwwqc wrote:
[url=http://baymontelreno.com]cialis 20 mg[/url] buy generic cialis online safely http://baymontelreno.com

Tue, August 7, 2018 @ 1:44 PM

7. wrote:
The other day, while I was at work, my sister stole my iphone
and tested to see if it can survive a 25 foot drop, just so she can be a youtube sensation. My iPad
is now destroyed and she has 83 views. I know this is totally off topic but
I had to share it with someone!

Thu, June 6, 2019 @ 10:31 PM

8. wrote:
This site was... how do I say it? Relevant!! Finally I've found
something that helped me. Kudos!

Sat, June 8, 2019 @ 12:18 AM

9. wrote:
Thank you, I have recently been searching for information approximately this subject for ages and yours is the greatest I've found
out so far. But, what about the bottom line? Are you sure in regards to the supply?

Thu, July 25, 2019 @ 10:55 PM

10. wrote:
Very nice post. I just stumbled upon your weblog and wanted to say that
I have truly enjoyed browsing your blog posts. After all I will be subscribing to
your rss feed and I hope you write again very soon!

Thu, August 1, 2019 @ 2:41 PM

11. wrote:
Excellent blog you've got here.. It's difficult to find good quality writing like yours these days.
I honestly appreciate individuals like you! Take care!!

Tue, August 13, 2019 @ 6:04 PM

12. wrote:
I believe that is one of the most important info for me.
And i'm satisfied studying your article. But should statement on some common things,
The web site taste is ideal, the articles is in point of fact great : D.

Just right task, cheers

Sat, October 12, 2019 @ 10:30 AM

13. wrote:
Howdy, i read your blog from time to time and i own a similar one and i
was just curious if you get a lot of spam feedback? If so how do you
stop it, any plugin or anything you can advise? I get so much lately it's driving me crazy so any
assistance is very much appreciated.

Sun, November 10, 2019 @ 11:25 AM

14. wrote:
I know this if off topic but I'm looking into starting my own blog and was wondering what all is needed to get set up?
I'm assuming having a blog like yours would cost a pretty penny?
I'm not very internet smart so I'm not 100% certain.
Any tips or advice would be greatly appreciated. Appreciate it

Thu, November 14, 2019 @ 12:30 PM

15. wrote:
You actually make it seem really easy along with your presentation but I in finding this matter to
be actually something which I think I might by no means understand.
It sort of feels too complex and extremely vast for me.

I am looking ahead in your next submit, I'll try to get the
cling of it!

Tue, November 19, 2019 @ 8:28 AM

16. wrote:
If you want to improve your knowledge just keep visiting this site and be updated with the most recent news
posted here.

Sat, November 23, 2019 @ 8:30 PM

17. wrote:
I like the helpful info you provide in your articles.
I'll bookmark your weblog and check again right here regularly.
I'm reasonably certain I will be informed plenty of new stuff right here!
Good luck for the next!

Mon, November 25, 2019 @ 7:54 AM

18. wrote:
What i don't realize is if truth be told how you are
no longer actually much more well-liked than you may be now.
You're so intelligent. You know therefore considerably relating to this matter,
produced me individually believe it from numerous various
angles. Its like men and women are not fascinated until
it's one thing to do with Woman gaga! Your own stuffs outstanding.
Always handle it up!

Thu, November 28, 2019 @ 6:38 PM

19. wrote:
Heya i am for the first time here. I came across this board and I to find It really useful & it helped
me out a lot. I'm hoping to give something again and help others such
as you helped me.

Mon, December 2, 2019 @ 4:46 PM

20. wrote:
Touche. Great arguments. Keep up the amazing effort.

Mon, December 9, 2019 @ 5:13 PM

21. wrote:
Do you have any video of that? I'd like to find out more details.

Sat, December 14, 2019 @ 8:24 PM

22. wrote:
It's truly very complicated in this busy life to listen news
on TV, thus I simply use the web for that reason, and take the hottest information.

Thu, December 26, 2019 @ 2:53 PM

23. wrote:
hey there and thank you for your information – I have definitely picked up anything new from right here.
I did however expertise some technical points using this site, since
I experienced to reload the web site many times previous to I could get it to
load properly. I had been wondering if your hosting
is OK? Not that I'm complaining, but slow loading instances
times will very frequently affect your placement in google and
could damage your quality score if advertising and marketing with
Adwords. Well I am adding this RSS to my email and can look out for
much more of your respective fascinating content.
Make sure you update this again very soon.

Thu, January 16, 2020 @ 3:28 PM

24. wrote:
Somebody essentially help to make critically articles
I might state. That is the first time I frequented your
website page and so far? I surprised with the analysis you made to make this actual
submit amazing. Magnificent activity!

Fri, January 24, 2020 @ 12:02 PM

25. 카지노게임사이트 wrote:
Very interesting details you have remarked, regards for putting up. “The judge is condemned when the criminal is absolved.” by Publilius Syrus.
카지노게임사이트

카지노사이트
바카라사이트
온라인카지노
우리카지노
카지노
라이브카지노
카지노사이트추천
카지노싸이트
바둑이사이트

Fri, April 24, 2020 @ 3:25 AM

26. 바카라사이트 wrote:
Somebody essentially help to make seriously posts I would state. This is the first time I frequented your web page and thus far? I amazed with the research you made to create this particular publish incredible. Fantastic job!
바카라사이트

Fri, April 24, 2020 @ 3:31 AM

27. 바카라 wrote:
Very interesting details you have remarked, regards for putting up. “The judge is condemned when the criminal is absolved.” by Publilius Syrus.
바카라
카지노사이트
카지노
바카라
바카라사이트
카지노
바카라
슬롯머신사이트
경마사이트
릴게임
스포츠토토사이트
카지노가입머니
카지노꽁머니
카지노무료머니
바카라사이트
바카라사이트추천
크레이지슬롯
t카지노
온라인카지노
릴게임사이트
룰렛사이트
솔레어카지노
더킹카지노
우리카지노
예스카지노
바카라노하우
온라인바카라
오카다카지노
안전놀이터
퍼스트카지노
파워볼


카지노사이트
카지노사이트추천
온라인카지노
카지노
바카라사이트


카지노사이트
바카라사이트
온라인카지노
온라인카지노
카지노사이트


바카라사이트
카지노사이트
카지노사이트추천
바카라사이트추천

Fri, April 24, 2020 @ 3:38 AM

28. 코인카지노 wrote:
Really enjoyed this article, how can I make is so that I receive an email whenever you make a fresh post?
코인카지노

카지노사이트
카지노
온라인카지노
바카라
슬롯머신
릴게임
카지노사이트추천
바카라사이트
바카라사이트추천
크레이지슬롯
퍼스트카지노
예스카지노
오바마카지노
더킹카지노
더나인카지노
우리카지노

Fri, April 24, 2020 @ 3:44 AM

29. 토토사이트 wrote:
This is truly a great read for me. I have bookmarked it and I am looking forward to reading new articles. Keep up the good work!. 토토사이트

Mon, June 8, 2020 @ 1:36 AM

30. 파워볼사이트 wrote:
That's in addition a great publish which i really valued learning. It's not every day that people maintain the opportunity to discover something. 파워볼사이트

Mon, June 8, 2020 @ 1:37 AM

31. 스포츠토토 wrote:
It really is concurrently a significant spot that i really savored exploring. Just isn't everyday offering the outlook to see or watch something. 스포츠토토

Mon, June 8, 2020 @ 1:37 AM

32. 토토 wrote:
Thanks for writing such a good article, I stumbled onto your blog and read a few post. I like your style of writing... 토토

Mon, June 8, 2020 @ 1:38 AM

33. 토토사이트 wrote:
This is a great article thanks for sharing this informative information. I will visit your blog regularly for some latest post. I will visit your blog regularly for Some latest post. 토토사이트

Mon, June 8, 2020 @ 1:39 AM

34. 파워볼사이트 wrote:
We need many stories, Like genuinely appreciated, You want addiitional data over it, mainly because it can be reasonably exceptional., Take care exclusively for declaring. 파워볼사이트

Mon, June 8, 2020 @ 1:39 AM

35. wrote:
You are so interesting! I do not believe I've truly read something like this
before. So nice to find another person with genuine
thoughts on this subject. Really.. thanks for starting this up.

This site is something that is required on the internet, someone with a little originality!

Sat, July 4, 2020 @ 8:04 PM

Add a New Comment


code
 

Comment Guidelines: No HTML is allowed. Off-topic or inappropriate comments will be edited or deleted. Thanks.