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The Daily Insight

How long does it take Clethodim to kill grass

Author

Eleanor Gray

Published May 12, 2026

This herbicide is used mostly to remove annual grasses in food plots. However, like Clethodim, it’s a fairly slow killer, and often takes 10 to 12 days to fully kill unwanted grasses in plots.

Will Clethodim kill tall grass?

Clethodim is simply the active ingredient in a number of grass-selective, post-emergent herbicides. * That means it kills actively growing grass, but when used correctly, won’t harm clover or other legumes.

How long does it take to kill the grass?

Depending on temperature, it can take up to 2 weeks for the entire lawn to die. If you do not wish to use herbicides, you can dig out the existing lawn and solarize the soil. Alternatively you can lightly moisten the soil and rototill it.

How long does Clethodim need before rain?

For grass herbicides like clethodim (Select) if you can get 30 minutes you will probably be okay. The crop oil really helps here. The label will have a longer rain fastness but this product gets in quickly. You can always come back with more if it is apparent in 4 or 5 days or week that nothing is going on.

What grasses does Clethodim kill?

It is particularly effective on annual grasses such as annual bluegrass, ryegrass, foxtail, crabgrass, and Japanese stiltgrass.

Is Clethodim safe for dogs?

Clethodim Technical was not carcinogenic to animals. Prolonged or repeated dermal exposures may cause drying, scaling and even blistering of the skin.

What does Clethodim do?

Clethodim is the active ingredient in a number of grass-selective, post-emergent herbicides. When used correctly, Clethodim will kill actively growing grass and is selective to certain broadleaf species.

Can you spray Clethodim on wet grass?

Yes sir – used surfactant starting at 5 oz per 15 gallons of water and my last batches were 10 oz at 15 gallons of water… best I ever saw was at one month after use I had a slight browning on some grass tips…

How much is a gallon of Clethodim?

Approximate use rate: 12-16 ounces per acre. For small batch spot spray use: 0.5-1 ounce per gallon of water.

How long does it take for cadre to work?

The control of difficult weeds (such as Florida beggarweed) and weeds treated under dry conditions is often greatly enhanced by a timely cultivation. Cultivation should be done at least 14 days after Cadre application.

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How long does it take to smother grass?

Add 4 – 6” of soil or compost or mulch on top of newspaper/cardboard layers 6. Allow 6 – 8 weeks for the grass under the paper/cardboard & compost layers to die back. Be patient! The longer you allow the decomposition process to take place, the better results you will see.

What kills grass fast?

The easiest, quickest and most effective way to kill off your lawn is to spray it with glyphosate, such as Bonide Kleenup Weed Killer Concentrate. It needs to be mixed with water before using, but there are ready-to-use options available as well.

How long does it take spectracide to kill grass?

Although the products begin working immediately, you may not start to see results for several hours, and complete death of the target weeds or grasses may take up to two weeks, according to the manufacturer.

How long does it take Clethodim to work?

This herbicide is used mostly to remove annual grasses in food plots. However, like Clethodim, it’s a fairly slow killer, and often takes 10 to 12 days to fully kill unwanted grasses in plots.

Is Clethodim safe for clover?

Clethodim is best for killing grass in clover and alfalfa, comes in many brand names like Arrow 2EC and Dakota.

How do you use Clethodim?

Apply CLETHODIM 2 EC HERBICIDE in 0.1 to 0.2 acre-inch of water either at the end of a regular irrigation set or as a separate application not associated with a regular irrigation using the least amount of water that provides proper distribution and coverage.

Does clethodim have residuals?

Select Max (clethodim) is slow acting but very effective at controlling a poor stand for a replant scenario (e.g., it will kill all the plants remaining). … These products have no residual activity that would delay planting; however, their effectiveness was inconsistent in UNL trials.

Is clethodim residual?

When sprayed on broadleaf plants, clethodim does not inhibit ACCase in the same way it does with grasses, giving it high selectivity and virtually no crop effect. It is only active as a foliar spray and is not taken up from the soil solution, therefore there is no residual activity.

How many ounces are in a gallon of clethodim?

65oz of clethodim per gallon of water and 1.33oz of concentrated crop oil per gallon of water.

How toxic is Clethodim?

Acute Toxicity: Clethodim is moderately toxic by ingestion. The reported oral LD50s are 1,630 mg/kg and 1,360 mg/kg in male and female rats, respectively (1). … The reported rodent 4-hour inhalation LC50s for clethodim technical and Select formulation are greater than 3.9 mg/L and 4.4 mg/L, respectively (58, 294).

Is Clethodim safe on centipede grass?

Answer: Since Grass Out Max (Clethodim Herbicide) is a grass killer in general we do not recommend you try to broadcast spray it over your centipede lawn as it may cause damage. Unfortunately centipede and bermuda grasses are so closely related that any product that would kill the bermuda would also kill the centipede.

Can you spray Clethodim on tomatoes?

Answer: Grass Out Max (Clethodim Herbicide) is used to remove all grasses from places like ornamental/flower beds and vegetable gardens if used as directed. You can use around tomato plants except in California.

Can I use Clethodim on sunflowers?

Clethodim kills grasses, not broadleafs. Should be good with any sunflower.

How much grass does it take to Max a gallon of water?

55 fluid ounces of Grass Out to every 1 gallon of water to be used. Grass Out Max per the product label is for use at the rate of 8 – 16 oz per acre to control goosegrass.

Can you mix Clethodim and 24DB?

Don’t tank mix them together or you will get severe antagonism. 16oz per acre of a 1lb AI clethodim or 8 oz per acre of a 2lb AI but that needs oil with it. On the butyrac go 8 oz per acre or you can use clearcast (imazamox) or raptor at 6 oz per acre. Last edited by 257wbymag; 05/28/16 05:35 PM.

Does clethodim require crop oil?

When using hand sprayers or high volume sprayers utilizing hand guns, mix 1/4% to 1/2% (0.33 oz. to 0.65 oz. per gal.) Clethodim 2EC and treat to wet vegetation, while not allowing runoff of spray solution. For uses requiring crop oil concentrate, include crop oil concentrate at 1% (1.3 oz.

Can you mix clethodim and glyphosate?

Glyphosate + clethodim mixture increases herbicide effectiveness. Low doses of herbicides are an important tool in integrated weed management. Synergism occurred at low doses for control and at all doses for dry mass.

Can I use clethodim on pumpkins?

The herbicide DCPA can be applied once the pumpkin plants have at least four or five leaves to control grasses and some broadleaf weeds. Clethodim can be used to control shorter grasses, such as bluegrass.

What can I spray on Clearfield sunflowers?

On Clearfield sunflower hybrids, use a non-ionic surfactant (NIS at 0.25% v/v) with at least 80% active load (ex., 80/20) with Beyond herbicide. 3. Always apply Beyond herbicide with a nitrogen fertilizer, such as liquid or dry spray-grade AMS, 28%N, 32%N or 10-34-00.

How do you use Herbadox?

MIXING: Fill spray tank with 3/4 full water. Add the required amount of HERBADOX 330E to the water in the tank while agitating. While stirring, add the remainder of the water and mix thoroughly. APPLICATION: Calibrate the sprayer prior to use to deliver the proper rate in a complete and uniform coverage.

How does Basagran herbicide work?

Basagran”‘ TlO herbicide is a selective postemergence herbicide for the control of broadleaf weeds, annual sedges, and yellow nutsedge in established turf. Basagran T/O does not control grasses. Basagran TlO is effective mainly through contact action; therefore, all plants must be thoroughly covered with spray.