OT Roundup use

Ralph wd45 · Apr 22, 2009

Hey guys, please forgive me for being so old and still ignorant, I need to know when to use my roundup on the weeds in the corn. Will I have to let the corn get a certain height, before using the roundup?, or is roundup ready corn immune at any age? This is my first time planting RR-BT seed, and the weeds really out grow the corn here in western washington. It seems that cool and wet doesn't deter a weed.I have a mounted cultivator on my wd45, but need to get what it misses.

paul · Apr 22, 2009

Best use of the ru is to hit the weeds fairly early on, little corn. That young corn just hates weed pressure, if you knock the weeds out early, the corn sits a while & builds good roots, then there is no stopping the corn.

There is some deal about spraying corn when it is too big with ru; but most folk don't seem to find that to be a real problem.

--->Paul

Ralph wd45 · Apr 22, 2009

Thanks a lot Paul! That is a relief, to know that I can get them early. the pigweed, and lambsquarter, really grow fast here. I am also worried about the weed seed , that might be in the 80 yards of cow poopy, that we put on before plowing.!!Thanks again Ralph:

big jt · Apr 23, 2009

Ralph.

For starters you should be able to spray anytime you want to. Hit the weeds early on though. you can use a reduced rate if they aren't to big and you will probably need to make a second application unless you add in something with a residual.

On a more important note. While I have enjoyed using a front mount cultivator on one of my old tractors for point rows. Leave your 45 in the shed instead of cultivating the whole field. You will just stir up a new batch of seed with it. I hit a couple of spots in a bean field with the cultivator once to buy myself some time till I sprayed the whole field. Bout a month after I sprayed you could tell just where I lifted the cultivator. Green as a lawn where I cultivated and black as coal where I hadn't. Take it from my mistake leave the cultivator in the shed!

Paul from MI · Apr 23, 2009

If you have a relatively small problem area you can spot spray by hand. I use a 3 gallon backpack type on small areas that may be missed, corners, power line poles, etc.
Paul

Anonymous-0 · Apr 23, 2009

I haven't done RR corn but have done beans. After planting give the weeds a chance to germinate. Wait till you have had a warm rain so the weed seeds that will emerge have done so. Then spray. If you get in too big a hurry and spray too soon you will get post spray weed emergence that you have to go back and spray again doubling you cost.

Mike Aylward · Apr 23, 2009

Ralph, if you have lambsquarter you definitely will want to hit the corn early. Anytime you have to kill a weed in corn you are already behind. Like another poster stated, kill the weeds when they are small. Corn absolutely does not like weed pressure. Mike

DoubleR · Apr 23, 2009

I have the best results when I spray early after the weeds come up. Then hit it with the cultivator when its about knee high or spray it again right before it canopies over. I have spot sprayed on the ends when it was shoulder high and not hurt it.

OT Roundup use

Ralph wd45

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paul

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Ralph wd45

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big jt

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Paul from MI

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Anonymous-0

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Mike Aylward

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DoubleR

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