Well this year we have had plenty of rain, sunflowers and corn look great but over run with pigweed in my sunflowers!!! Had 3 farm laborers come and pull for one day, did not get more than 1/5 of field done.
Any suggestions?
Prob too late to do anything about it at this point. Best results we’ve had is to cultivate old school style until sunflowers are tall enough to shade out everything else.
On the upside, dove love to eat pigweed. Its just a beeatch to hunt in.
“Endeavor to Persevere.
Give,Give… Never Take.”
EC
At this point in the game its too late . Kill everything with Gramoxone in a couple weeks and do a better job preplant and through the early part of the season keeping it clean. Cadre/Beyond don’t do nearly as good of job keeping clearfield sunflowers clean due to increased ALS resistance in these pigweeds so you have to really do a good job right off the rip to keep your field as clean as possible.
Definitely will burn it down with Gramoxone, after the season last year we cut it under and then after a month or so burnt it down with roundup. We used pre-emergent and sprayed Cadre once it was tall enough. Never had this bad of pigweed problem before. 5th season planting same field.
I just want to get ahead of it for next year!
MICHAEL L SMITH
Sounds like the pigweeds are building resistance to prior chemicals. Try rotating the corn patch and sunflower patch h. Using different chemicals with different modes of action.
Ive also seen where the debris is wind rowed and burnt once its dry to destroy as many seed as possible.
quote:Good luck. I've switched herbicide,rotated areas,etc. The only thing that works is putting on a good pair of leather gloves and start pulling after spraying, the root system is weakened making it easier. Sunflower has to be the culprit, as I never had it until I started with the Clearfield.
Originally posted by docsordersSounds like the pigweeds are building resistance to prior chemicals. Try rotating the corn patch and sunflower patch h. Using different chemicals with different modes of action.
I’ve been trying to post a pic. Keeps giving me a message says file is too large. Its just a pic of a pigweed free field of soybeans. 4 different modes of chemicals was used. Three Separate applications. I haven’t grown sunflower since 2015
For sunflower use a good residual herbicide that will control the types of weeds you have at or before planting. Make sure to start clean by tillage or chemical burn down.
Make sure your spray equipment is calibrated correctly. Also adequate agitation is essential to keep the spray mix diluted.
Growing the crop off fast to shade the ground slows the leaching of your residual chemicals.
30 inch rows or less.
Hit any weed escapes early!! With post emerge herbicides.
Rotating the next season with corn or sorghum for example. Attack hard this will be the crop to address some of your tougher weeds. So many more options than woth sunflower. Plant the corn late April first week of may if controlling pigweed and morning glory for example. This is when they are starting to germinate. Hope this helps.
Yeah, I don’t have any in my corn, notice in the image below, that’s yesterday . I have 3 acres of soybeans, next to 5 acres of browntop,not any pigweed. Only plots I have it are where I planted Clearfield.
I could only c the corn pic poly. That is a clean field. Congrats. Looks like what you used really nailed the weeds and kept them down.
Seems like we planted sunflower that was resistant to liberty in 2015? Maybe it was clear field? We used prowl as a premerge and didn’t spray again until August to kill everything. We didn’t have a lot of weed pressure just grass mostly. Liberty is pretty tuff on pig weeds.
What did you use in the corn? If you dont mind me asking.
Atrazine and glyphosate in the corn early,had some rattlebox pop up, so I used clarity and glyphosate later . It’s so clean,you can see a dove in between rows 50 yds down the line.
My problem is I don’t have enough tillable acreage to rotate crops. I planted about an acre of corn and it did well. has a little morning glory now but not much.
I will try a few things suggested…one thing that did not work was trying to pull it green. It re-rooted and began growing again with the stems horizontal and the shoots vertical. It made much more of a mess than just spraying!
2 good shoots so far with limits of 12 for all!
MICHAEL L SMITH