Triclopyr

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Dargin
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Triclopyr

Post by Dargin » May 24th, 2019, 9:45 am

I'm going to be spraying some weeds for a neighbor. They have a lot of clover, wild violet and ground ivy. I'm pretty familiar with the triangle approach, but I'm wondering if I could jump right to level two on this lawn, given the weeds I'm targeting? I also have quinclorac on hand if crabgrass becomes an issue.

If so:
I was looking at Hi-Yield Triclopyr on domyown.
It's 60.45% triclopyr, butoxyethyl ester.
The Triangle article suggests concentrations of 8% or so.
I get the impression that there's not much room for error (overlapping) with this particular concentration?

Thanks.

TimmyG
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Re: Triclopyr

Post by TimmyG » May 24th, 2019, 11:23 am

The higher concentration is what's sold in the bottle, not what you mix in your tank sprayer. The application rate should be roughly the same regardless of the product concentration. It's just a lot cheaper to buy the ~61% triclopyr.

Dargin
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Re: Triclopyr

Post by Dargin » May 24th, 2019, 12:23 pm

Makes perfect sense. I should have caught that. Thanks.

kbgfarmer
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Re: Triclopyr

Post by kbgfarmer » May 30th, 2019, 12:02 am

I have the 60 percent concentration as well. Like TimmyG mentioned you don’t spray it directly on your lawn. Calibrate your sprayer. It’s all about sprayer output per 1000k.

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Re: Triclopyr

Post by TimmyG » May 30th, 2019, 2:23 am

kbgfarmer has a 23-acre homestead.


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HoosierLawnGnome
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Re: Triclopyr

Post by HoosierLawnGnome » May 30th, 2019, 8:25 am

Follow the label on what you buy and use a surfactant. Watch the temperatures as it's getting hot. Mix in a little nitrogen via urea or ammonium sulfate if you have it too.

Surfactant is important for triclopyr and the weeds you're targeting. It's a long, slow kill.

P.S. i think you are smart to identify the weeds you have and go at them with the right herbicide. Triclopyr hurts a good number of easier weeds anyways.

Dargin
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Re: Triclopyr

Post by Dargin » May 30th, 2019, 6:56 pm

Thanks for the input and advice, everyone.

I have some nonionic surfactant I plan to use. I can see I'm a little late in the game so I'm staying aware of temperatures.
Planning the first app for early next week after the next bit of rain passes. Should be in the mid 60's. I'll be mixing 3/4 oz. to around a gallon to cover 1k, as per label.

Yeah, I've been reading a lot about these weeds going down slowly. I'm anticipating a 2nd app will be needed. The label says to wait at least 4 weeks for follow up applications. Not sure if this is this is standard for triclopyr, or if it's reasonably safe/effective to hit it again earlier. I'll search the archives.

Unfortunately I don't have liquid nitrogen or ammonium sulfate. Could I get the same effect by watering in, say, about a 1/4-1/2 lb. of N via granular urea the day before I spray? Is the N solely to push growth (speed up the triclopyr uptake)?

Thanks.


Ps. 23 acres! Save some earth for others to use. ;D

kbgfarmer
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Re: Triclopyr

Post by kbgfarmer » May 31st, 2019, 4:29 am

TimmyG wrote:
May 30th, 2019, 2:23 am
kbgfarmer has a 23-acre homestead.
I wish! More like 2 acres.

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Re: Triclopyr

Post by TimmyG » May 31st, 2019, 11:58 am

kbgfarmer wrote:
May 31st, 2019, 4:29 am
I wish! More like 2 acres.
Then whatcha doin' calibrating your sprayer for 1,000,000 sq ft? :razz:

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Re: Triclopyr

Post by HoosierLawnGnome » June 1st, 2019, 6:40 am

4 weeks is too far apart for clover, wild violet. 10 days. It will recover too much in a month.

Dargin
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Re: Triclopyr

Post by Dargin » June 1st, 2019, 9:36 am

Cool. It was beginning to dawn on me that temperatures would very likely cause a problem with repeat apps that far apart. Did some reading about CCO here. I saw Andy's recommendation of 3 applications 14 days apart. I believe it was for roughly the same application rate; I can see how the labeled app rates and concentrations closely even out across CCO, Ortho Poison Ivy, and the ~60% concentrate I'm using.

So I suppose I'm in the ballpark if I shoot for 10-14 day intervals between 3 applications.

Crossing my fingers for low winds.

Thanks.

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Re: Triclopyr

Post by HoosierLawnGnome » June 1st, 2019, 12:30 pm

Yeah, the real way to figure out when to reapply, is to use your eyeballs to tell when target plants slow or stop showing signs of atrophy. Then reapply. But as a general rule, yes, 2 weeks is that timeline. You start splitting hair honestly - but plan on that kind of timeframe. 4 weeks is a big gap.

The point with triclopyr on clover and wild violet is to protract the damage Triclopyr does and give it time to kill a much hardier (woody) plant. Keep going until it's gone at a slow pace without hurting what you want.

Dargin
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Re: Triclopyr

Post by Dargin » June 1st, 2019, 3:51 pm

Got it. Appreciate the info, man. Thank you. :)

agn015
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Re: Triclopyr

Post by agn015 » June 4th, 2019, 1:13 pm

Thank you for for posting this, you've encouraged me to attack the clover in my yard! On Friday I hit it with triclopyr from Ortho Poison Ivy and Brush Killer. I mixed up 1.5 oz of 8% triclopyr with 1.5 gallons of water with 1.5 oz of non-ionic surfactant. It hasn't even been a week and I can already tell the clover is hurting. It's not really turning brown but the patches seem a little smaller and the clover itself looks to be twisting and curling. I plan to reevaluate at 10-14 days and see if I need to respray.

Good luck with your neighbors yard!

Dargin
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Re: Triclopyr

Post by Dargin » June 4th, 2019, 2:11 pm

Woohoo! Awesome to hear, Agn! And thanks!

I got pushed back due to possible rain. Looking like Friday for me. Temps are gonna be in the high 70's..., has me worried.

I'm also glad you posted this, because you have me thinking that I might be misunderstanding the labels.
Isn't 1.5 fl oz of 8% a really light app?
I thought the Poison Ivy label says 4 fluid oz / gallon. Think I also remember reading to use that one at the labled recommendation of Ortho's chickweed, clover, oxalis killer (CCO), which is 6 fluid oz / gallon?

My ~61% triclopyr states 3/4 oz per gallon. So the math seems about right. Regardless, sounds like you're getting results. :)

Could anyone care to confirm the app rates? I might just be having a senior moment...
I'll have a search.

Dargin
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Re: Triclopyr

Post by Dargin » June 4th, 2019, 3:18 pm

Poked around the archives. Seems like 4-5 fluid ounces of 8% is the standard application rate per k. Maybe I'll try 1/2 fl. oz of the 61% instead of the 3/4 fl. oz label rate. Maybe hedge my bets against heat stress?

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Re: Triclopyr

Post by flyingfish88 » June 4th, 2019, 3:20 pm

Would really like to hear about a 'spot application' rate for Ortho CCO.

The application rates on the bottle are for coverage areas (ex. the 16 oz bottle covers 3,200 square feet), but most of my applications are spot treatment of the weeds. I've also done 1 oz / gallon, but not sure if this is the right mix. However, with repeated apps I've had success.

@Agn015 - would definitely recommend you plan to hit it again in 10-14 days. I've had many instances where I've seen some impact, but then the plants eventually recover.

TimmyG
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Re: Triclopyr

Post by TimmyG » June 4th, 2019, 10:16 pm

Spot application mix recommendations are usually no different than the broadcast rates. It's up to you to know how to spot apply at the same coverage rate as your would say 1 gallon per 1000 sq ft. For example, the spot application rate for Tenacity is 1 tsp in 2 gallons applied at 1 gallon per 1000 sq ft. I believe that works out to about 3.6 oz/acre.

The 16oz Ortho CCO bottle says 1 fl oz/gallon of water/200 sq ft. That applies to both broadcast and spot spraying.

kbgfarmer
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Re: Triclopyr

Post by kbgfarmer » June 4th, 2019, 10:37 pm

TimmyG wrote:
June 4th, 2019, 10:16 pm
Spot application mix recommendations are usually no different than the broadcast rates. It's up to you to know how to spot apply at the same coverage rate as your would say 1 gallon per 1000 sq ft. For example, the spot application rate for Tenacity is 1 tsp in 2 gallons applied at 1 gallon per 1000 sq ft. I believe that works out to about 3.6 oz/acre.

The 16oz Ortho CCO bottle says 1 fl oz/gallon of water/200 sq ft. That applies to both broadcast and spot spraying.
I’ve never done it but what you could do is mix up at half broadcast rate to increase safety in case of heavy handed spot spraying. I know I tend to use more spray spot spraying as compared to broadcasting where your are continuously walking over an area.

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Re: Triclopyr

Post by flyingfish88 » June 5th, 2019, 9:05 am

thanks Timmy and Farmer! I assumed I was on the right path, but good to hear I was doing it right. Was not harming grass so no worries on over application, but didn't want to be under applying on the already tough to kill violets.

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