Chickweed

Kentucky bluegrass, Fescue, Rye and Bent, etc
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Wally
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Chickweed

Post by Wally » April 4th, 2010, 7:32 pm

Whats the best way to fight chickweed. It seems to lie very low to the ground below the grass blades.

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Re: Chickweed

Post by GaryCinChicago » April 4th, 2010, 7:42 pm

Triclopyr

Found in This Ortho® Weed B Gon® Chickweed, Clover and Oxalis Killer

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andy10917
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Re: Chickweed

Post by andy10917 » April 4th, 2010, 7:46 pm

Gary typed faster than me, but I'll leave my post the way I typed it:

I can only tell you of a very good synthetic solution: Ortho's Chickweed, Clover and Oxalis Killer. You'll see it mentioned on this site sometimes as just "CCO". Does exactly what it says it will do, and is quite effective on Ground Ivy and even my nemesis Wild Violets, although those can require 2-3 treatments.

I don't know of any organic treatments other than high-mowing and thick grass, but if you have Chickweed, almost by definition you can't play that card as an immediate solution.

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Wally
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Hose end sprayer

Post by Wally » April 5th, 2010, 6:47 am

If I set my hose end sprayer as per label, how much do you then spray on the grass? Just till wet?

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Re: Hose end sprayer

Post by bajafx4 » April 5th, 2010, 8:09 am

Wally wrote:If I set my hose end sprayer as per label, how much do you then spray on the grass? Just till wet?
Yes. I just used some of this stuff for the first time a little over a week ago and it worked good. Just estimate the area you want to cover and add the proper amount to your hose end sprayer. One ounce covers 200 ft².


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bajafx4
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Re: Hose end sprayer

Post by bajafx4 » April 5th, 2010, 8:13 am

bajafx4 wrote:Yes. I just used some of this stuff for the first time a little over a week ago and it worked good. Just estimate the area you want to cover and add the proper amount to your hose end sprayer. One ounce covers 200 ft².
Well now that I think about it, Ortho CCO is clear. I mixed a full dose of Ortho CCO and Ortho Weed-B-Gone Max together in the same sprayer (Max is brown). So I could easily tell when my hose end sprayer was empty. That might not be as easy if you're only using CCO because you won't be able to distinguish the clear CCO from water. I don't think you want to spray too much water once the sprayer runs empty of CCO... might wash the CCO off the leaves.

It might be better to use a tank sprayer, so you know when you're empty.

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Wally
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Re: Chickweed

Post by Wally » April 6th, 2010, 7:01 am

Looking at the label, 6 oz is sprayed over 1200 sf, so the whole bottle will only treat around 3000 sf.

I don't think I was using enough product. I need a bigger bottle!

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Re: Chickweed

Post by McLovin » April 8th, 2010, 8:34 pm

Ortho makes two products with 8% Triclopyr as the only active ingredient:

Ortho CCO and Ortho MAX Poison Ivy and Tough Brush Killer Concentrate

http://www.scotts.com/smg/catalog/produ ... tabs=usage

http://www.scotts.com/smg/catalog/produ ... tabs=usage

The CCO says 16 oz makes 16 gallons of solution at 1 oz per gallon (treats 200 sf per gallon or 3200 ft per 16 oz bottle) and is safe for cool season grasses.

The MPI&TBKC says 8 gallons per 32 oz (4 oz per gallon) and treats 100 sf per gallon or 800 sf per 32 oz AND NOT TO USE ON GRASS.

At the local HD, the MPI&TBKC is about $15 for 32 oz versus OCC at $10/16 oz.

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Re: Hose end sprayer

Post by cactus » April 8th, 2010, 8:53 pm

bajafx4 wrote:That might not be as easy if you're only using CCO because you won't be able to distinguish the clear CCO from water.
Add some blue food coloring? I don't know how much you'd need to see the colorant in the spray, but it might be easier to identify the concentrate in the sprayer.

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Re: Chickweed

Post by MorpheusPA » April 8th, 2010, 9:14 pm

You can purchase colorant at a lot of Lesco stores to be added to herbicides (or anything else), or purchase it online. Stuff like this: http://www.pbigordon.com/professional/page.php?id=503 http://www.beckerunderwood.com/en/products/stsdrc

I can't find a place to order either, but maybe somebody else can help with that. Don't bother with the food coloring, it's not concentrated enough to do the job and I won't guarantee all the additives won't interact with the herbicide.

Other than that, this is the 21st century. We no longer call it chickweed. It's womanweed now.

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Re: Chickweed

Post by bajafx4 » April 9th, 2010, 10:35 am

McLovin wrote:Ortho makes two products with 8% Triclopyr as the only active ingredient:

Ortho CCO and Ortho MAX Poison Ivy and Tough Brush Killer Concentrate

The CCO says 16 oz makes 16 gallons of solution at 1 oz per gallon (treats 200 sf per gallon or 3200 ft per 16 oz bottle) and is safe for cool season grasses.

The MPI&TBKC says 8 gallons per 32 oz (4 oz per gallon) and treats 100 sf per gallon or 800 sf per 32 oz AND NOT TO USE ON GRASS.

At the local HD, the MPI&TBKC is about $15 for 32 oz versus OCC at $10/16 oz.
Does that mean you could purchase the Ortho PI/TBK and mix it in sprayers according to the CCO label... saving you about $5 per 32oz.?

I was going to blanket my entire lawn w/ CCO until I saw the 16 oz. were $10 each. I needed 14 bottles ($140), so I decided to spot treat instead.
Last edited by bajafx4 on April 9th, 2010, 10:40 am, edited 1 time in total.

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Re: Chickweed

Post by andy10917 » April 9th, 2010, 10:36 am

Yes. They are the identical product and strength. The only difference is the application instructions.

Once upon a time, Triclopyr was approved for Brush killing, but not for lawns. It was a quiet little secret that it worked very well on some tough lawn weeds at half the brush killing strength. Of course, since I didn't want to do 25 years-to-Life for illegal wild violet killing ("violicide"?), I personally never participated in such activity. Much. OK, a little. But not every day.

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Re: Chickweed

Post by bajafx4 » April 9th, 2010, 10:49 am

andy10917 wrote:Yes. They are the identical product and strength. The only difference is the application instructions.
Good... actually great to know! CCO would cost me $140, TBK only $105!

Scotts/Ortho always trying to get in my pockets. :(

Another strange Ortho price quirk I noticed at Lowes the other day in regard to WBG Max w/ CG Control. I compared the 32oz. concentrate bottle to the 32oz. RTU bottle... both are identical in every way except the actual bottle and the price. One would think that the RTU would be more expensive because of the RTU hose nozzle attachment on every bottle, but the concentrate bottle was actually about $0.30 more per bottle.

So I bought the RTU bottles and used them in a hose end sprayer.

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Re: Chickweed

Post by McLovin » April 9th, 2010, 3:03 pm

If you want a whole lot of trichlopyr, here is an equivalent of 30.8 bottles (32 oz) of the TBK for $120 including shipping.

http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 602_263622

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Re: Chickweed

Post by GaryCinChicago » April 9th, 2010, 7:43 pm

McLovin wrote:If you want a whole lot of trichlopyr, here is an equivalent of 30.8 bottles (32 oz) of the TBK for $120 including shipping.

http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 602_263622
Cheaper because it is 1000% stronger, so you use WAY less.

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Re: Chickweed

Post by andy10917 » April 9th, 2010, 8:42 pm

That would kill a whole lot of Chickweed. Like a patch the size of Montana.

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Re: Chickweed

Post by McLovin » April 9th, 2010, 10:02 pm

andy10917 wrote:That would kill a whole lot of Chickweed. Like a patch the size of Montana.
Almost! Actually treats about 200,000 sq ft or 4.5 acres.

I just went with the regular TBK myself, I have some tough speedwell that must have a little Image in it, cause I spray it and it says "I'll be back"!

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