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Implement Alley Discussion Forum

Milkweed Control

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Robert Cornell

08-16-2003 16:50:13




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Are there any effective selective herbicides out there that will help reduce or eliminate milkweed in hay ground without damaging alfalfa and timothy? I am trying to revive about 25 acres that have basically had nothing done to them in about 30 years and am hopefully going to be able to do it without reseading....the timothy and alfalfa are doing great, unfortunately, so is the milkweed..... .




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Dan

08-16-2003 22:05:16




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 Re: Milkweed Control in reply to Robert Cornell, 08-16-2003 16:50:13  
I use 2-4D, the legal kind on Milkweed. You have to wet it down good though to do it. Can also use 2-4D with Banvile(Weedmaster) problem is it will kill any broadleaves so your alfalfa is toast. Best bet it to cut and try to control that way, or spray and re drill alfalfa



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kyhayman

08-16-2003 20:02:01




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 Re: Milkweed Control in reply to Robert Cornell, 08-16-2003 16:50:13  
One of the problems with mixed stands is that you dont have many choices in the way of herbicides. Got an idea that might work, risk is pretty low. Gramoxone is labled to apply to alfalfa just after you take a cutting off before it leaves back out. After hot weather (here that is first cutting) timothy gets pretty dormant. Might try spraying then. Timothy seed is cheap if you do kill some of it. I notil in my alfalfa after year 1 and year 4. Seed is under $1 per pound at a rate of 10# per acre.

Other thing is to keep the milkweed from going to seed as it isan annual.

I've got some 10 year old alfalfa stands but 25, that's fantastic. 10 is about my limt. Timothy I can't get more than 5 but I'm just south of the growing zone.

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Tim(nj)

08-17-2003 11:50:29




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 Re: Re: Milkweed Control in reply to kyhayman, 08-16-2003 20:02:01  
Common and giant milkweeds are perennials . . . . and I have found them very difficult to control. Mowing them doesn't get rid of them. Keeps them from spreading so much, but they're still there. 2,4D and Banvel will get maybe 50% kill. I've had best luck spot-spraying Glyphosate on the toughest ones. But if you're looking at a lot of ground, walking around spot-spraying isn't going to be an efficient use of your time.

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paul

08-16-2003 19:14:28




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 Re: Milkweed Control in reply to Robert Cornell, 08-16-2003 16:50:13  
Milkweed goes away with multiple mowings, so just harvest the stuff, & you'll have less & less.

30 years old & still has alfalfa? Up here in MN alfalfa disappears in 5-6 years.....

--->Paul



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Robert Cornell

08-17-2003 08:32:23




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 Re: Re: Milkweed Control in reply to paul, 08-16-2003 19:14:28  
I know that alfalfa that old seems unlikely, but I know for a fact that the field has been fallow since the local cheese factory closed in 1968 and the alfalfa is very thick in places and fairly well distributed. Of course, since nothing has been done, the alfalfa has gone to seed and repropigated itself.....



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paul

08-18-2003 10:18:28




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 Re: Re: Re: Milkweed Control in reply to Robert Cornell, 08-17-2003 08:32:23  
Alafalfa has auto-toxicity (if that's spelled right?) where the adault plants kill new seedlings, but left to it's own devices, esp. in dry regions, it will reseed itself slowly. Just don't plan on adding more seed & new shoots will grow well....

You can use a few sprays on new seedlings to kill broadleaves, but I'm not sure of anything to get them in an adult stand, where the alfalfa becomes suseptible to the sprays. Some people will time out a spray right after mowing with little harm to the alfalfa, but generally then the weeds are not susceptable to the spray either.

For broadleaves, either rip it up & plant something else for a year or two; or mow your 3 or 4 or 5 cuttings a year & knock them down that way, many broad leaves can't reproduce that fast & fade away.

--->Paul

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Huckelberry

08-17-2003 06:34:10




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 Re: Re: Milkweed Control in reply to paul, 08-16-2003 19:14:28  
Paul is right...just keep mowing and it will disappear, not a real problem weed. Spend your money on fertilizer instead of herbicides and your grasses will outgrow the weeds.



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