Spraying Clearfield sunflowers

[seaduck]

Our first year planting Clearfields. Came up great. Hit with pre emergence like we do every year. We have our immox with surfactant and nitrogen ready to spray. Question is sunflowers are 5 inches tall and not one single weed in field, so when do we spray. Didn’t know if there was a point when we couldn’t spray. Thanks for help.

 

[doomtrpr_z71]

It should be applied by the 8leaf stage on the sunflowers.

 

[Knotwild]

I have sprayed them using drops on the sprayer when they get tall enough. Now I use Spartan Charge + Treflan and forget about them.

 

[davidhelmly]

I have sprayed them using drops on the sprayer when they get tall enough. Now I use Spartan Charge + Treflan and forget about them.

What is "drops on the sprayer"?

 

[doomtrpr_z71]

Drop nozzles to drop the spray nozzle down below the plant canopy.

 

[ChattBuck]

Sprayed ours with Beyond a week ago tomorrow. Haven't really seen anything dying yet, but didn't have a large weed burden either.

Anyone know how long Beyond/Immox takes to start killing?

 

[cowhornedspike]

Haven't planted clearfield sunflowers for a few years but when I did I used Cadre on them. Very clean ground under them with lots of doves. Slow acting and you won't see results quickly but lasts all season. Residual can affect what you can plant in that plot the next season though.

 

[doomtrpr_z71]

Sprayed ours with Beyond a week ago tomorrow. Haven't really seen anything dying yet, but didn't have a large weed burden either.

Anyone know how long Beyond/Immox takes to start killing?

It's not quick, if you didn't look closely you may not see it working in a week. What are you trying to kill? There are some populations of als resistant pigweeds and beyond isn't going to kill them in one application.

 

[ChattBuck]

It's not quick, if you didn't look closely you may not see it working in a week. What are you trying to kill? There are some populations of als resistant pigweeds and beyond isn't going to kill them in one application.

You assume my weed ID is up to par. It's not. I can just say i have spots where there's a lot of "non sunflower" growth. Only one I can identify is a lot of ragweed. Beyond literature says it "might" work on ragweed.

 

[doomtrpr_z71]

If it's bigger than 3in ragweed it most likely isn't going to give very good control.

 

[ChattBuck]

If it's bigger than 3in ragweed it most likely isn't going to give very good control.

Planted 30 inch wide rows. Probably going to just walk them with a backpack sprayer and at least thin out the ragweed here in a week or so. It's pervasive in part of my field.

 

[gobble79]

Is there anything for briars in the sunflowers?

 

[doomtrpr_z71]

Is there anything for briars in the sunflowers?

Not if they aren't clearfields

 

[doomtrpr_z71]

Beyond also works better if you put ams or liquid nitrogen with it and a surfactant as well.

 

[gobble79]

Beyond also works better if you put ams or liquid nitrogen with it and a surfactant as well.

They are clear fields and I just sprayed cadre. Didn’t know if cadre would take care of briars.

 

[doomtrpr_z71]

It will most likely knock them back but not kill them, I don't think the rate will be high enough.

 

[gobble79]

Thanks

 

[doomtrpr_z71]

It also depends on soil moisture, cadre beyond etc are taken up more readily through the roots than through the leaves.