Pennant Magnum Herbicide Help - Questions and Answers

Pennant Magnum Herbicide

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Pennant Magnum Herbicide

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Asked by Paul

03/20/2011

Q

What is the mix rate for hand spraying Pennant Magnum?
How much of this should be mixed in per 2 gallons of water when using a handheld sprayer? I need to treat about 5000 square feet of turfgrass. I read the product label, and didn't see this info.

A

The first thing you need to know when using an herbicide such as Pennant Magnum is that the exact amount of water you dilute it with is not important. It is only important to make sure you are using the correct amount of product per 1,000 sq ft of lawn. Use too much and you risk damaging your …
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The first thing you need to know when using an herbicide such as Pennant Magnum is that the exact amount of water you dilute it with is not important. It is only important to make sure you are using the correct amount of product per 1,000 sq ft of lawn. Use too much and you risk damaging your lawn, use too little and you will not get adequate results. You will need to use 11 ml -28 ml per 1,000 sq ft . To decide how much water you want to use, you should mark a 1,000 sq ft area, fill your sprayer with water ONLY, and start walking and spraying just as if you were doing the actual application of herbicide. When you are done walking and spraying the 1,000 sq ft area note how much water it took you to spray that area, and that is the amount you will want to mix 11 ml - 28 ml of product with for each 1,000 sq ft area that needs to be treated. You will need to make sure treated areas are irrigated with at least 1/2 inch of water (either by rainfall or by sprinkler) following the application.

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44 of 53 people found this answer helpful.
Asked by Paul

05/29/2011

Q

Shelf life of Pennant Magnum?
What is the shelf life of Pennant Magnum once it is opened? A gallon of this would be a ten year supply for me.

A

Pennant Magnum, like most of our other concentrates, should last for years and years on the shelf. Most manufacturers give a shelf life of at least 5 years, but products can last longer if you keep the lid on, keep the product out of direct sunlight, and shake up the container every few months…
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Pennant Magnum, like most of our other concentrates, should last for years and years on the shelf. Most manufacturers give a shelf life of at least 5 years, but products can last longer if you keep the lid on, keep the product out of direct sunlight, and shake up the container every few months to prevent the active ingredient from settling to the bottom and getting clumpy and dried out.

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23 of 24 people found this answer helpful.
Asked by Brett from St. Petersburg, Fl

02/19/2018

Q

Is a surfactant required when applying the Pennant Magnum?

A

Pennant Magnum is a pre-emergent herbicide, therefore - and per the label - a surfactant is not required when applying it.

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13 of 13 people found this answer helpful.
Asked by D from Memphis Tn

07/17/2012

Q

What is the correct usage rate of Pennant Magnum per gallon of water?

A

The first thing you need to know when using an herbicide such as Pennant Magnum is that the exact amount of water you dilute it with is not important. It is only important to make sure you are using the correct amount of product per 1,000 sq ft of lawn. Use too much and you risk damaging y…
Read Full Answer »
The first thing you need to know when using an herbicide such as Pennant Magnum is that the exact amount of water you dilute it with is not important. It is only important to make sure you are using the correct amount of product per 1,000 sq ft of lawn. Use too much and you risk damaging your lawn, use too little and you will not get adequate results. You will need to use 11 ml -28 ml per 1,000 sq ft (you will need to refer to the product label to see what usage rate will work best for your needs). To decide how much water you want to use, you should mark a 1,000 sq ft area, fill your sprayer with water ONLY, and start walking and spraying just as if you were doing the actual application of herbicide. When you are done walking and spraying the 1,000 sq ft area note how much water it took you to spray that area, and that is the amount you will want to mix 11 ml - 28 ml of product with for each 1,000 sq ft area that needs to be treated. You will need to make sure treated areas are irrigated with at least 1/2 inch of water (either by rainfall or by sprinkler) following the application.

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10 of 22 people found this answer helpful.
Asked by Paul

05/29/2011

Q

Late spring application on nutsedge?
Its the last week of May, and I have yellow nutsedge starting to appear. Is it too late (or a waste of money) to apply a preemergent? Or could I apply this in the first or second week of June, and use Halosulfuron on the plants that are already showing?

A

For most of the country it is too late to apply a pre-emergent. Pre-emergents prevent weeds from germinating and growing and so if you already see weeds in your yard then it is definitely too late. Most of the weeds should have germinated by now. However, we are not sure where you …
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For most of the country it is too late to apply a pre-emergent. Pre-emergents prevent weeds from germinating and growing and so if you already see weeds in your yard then it is definitely too late. Most of the weeds should have germinated by now. However, we are not sure where you live and we are not familiar with every part of the country. We recommend that you call your local cooperative extension office, and they should be able to tell you the exact times of year to apply the pre-emergent in the late fall and early spring so you can treat at the proper times in the future. As far as existing nutsedge, our most popular selling product with Halosulfuron is our Sedgehammer product.

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9 of 13 people found this answer helpful.
Asked by Jim from Silver Spring, Md

01/26/2014

Q

How soon after applying pennant magnum can I plant grass seed?

A

After applying Pennant Magnum, you want to wait 4 months before and after to reseed. You should not have to apply a post emergent herbicide. If you find that there are still a fews weeds that come through, you can use a post emergent herbicide as well. Please be sure to follow all label instru…
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After applying Pennant Magnum, you want to wait 4 months before and after to reseed. You should not have to apply a post emergent herbicide. If you find that there are still a fews weeds that come through, you can use a post emergent herbicide as well. Please be sure to follow all label instructions.

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3 of 3 people found this answer helpful.
Asked by Ronnie from Greenville, Ms

06/19/2016

Q

Should I apply Pennant Magnum before the grass green up or after?

A

For most of the country Pennant Magnum would be applied in the spring and/or fall and sometimes summer, not based on when the lawn greens up. Pre-emergents prevent weeds from germinating and growing and so if you already see weeds in your yard then it is definitely too late. Most of the weeds sh…
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For most of the country Pennant Magnum would be applied in the spring and/or fall and sometimes summer, not based on when the lawn greens up. Pre-emergents prevent weeds from germinating and growing and so if you already see weeds in your yard then it is definitely too late. Most of the weeds should have germinated by now so it would be too late to apply. However, we are not sure where you live and we are not familiar with every part of the country. We recommend that you call your local cooperative extension office, and they should be able to tell you the exact times of year to apply the pre-emergent in the late fall and early spring so you can treat at the proper times in the future.

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3 of 5 people found this answer helpful.
Asked by Derrick from St Louis, Mo

06/24/2018

Q

Can Pennant Magnum be applied over cool season grass?

A

No, Pennant Magnum is not labeled for applications to cool season turf.

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3 of 4 people found this answer helpful.
Asked by Todd from Milan, Tn

02/21/2019

Q

Can I use Pennant Magnum before laying sod?

A

After applying Pennant Magnum, you want to wait 4 months before and after to reseed/resod.

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3 of 3 people found this answer helpful.
Asked by Jeanette from Deerfield, Wisconsin

06/20/2018

Q

Because nutsedge is a tuber and can emerge at various times over the summer, does Pennant Magnum require more applications?
I have used the Sedge Hammer for those already emerged but still have growth appearing throughout the summer. Exactly how does the Pennant need to be applied? Would more treatments need to be spaced out over the summer to hopefully be free of any more emerging nut sedge?

A

You can apply Pennant Magnum once or twice annually before weeds emerge for complete nutsedge control as long as you do not exceed the total of 4.2 pints/Acre (46 mL/1,000 sq ft) per year or crop cycle, whichever is less. Use higher label rates where yellow nutsedge is expected. You will use 14-28 m…
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You can apply Pennant Magnum once or twice annually before weeds emerge for complete nutsedge control as long as you do not exceed the total of 4.2 pints/Acre (46 mL/1,000 sq ft) per year or crop cycle, whichever is less. Use higher label rates where yellow nutsedge is expected. You will use 14-28 mL/1,000 sq ft depending on your soil texture and level of expected weed infestation. If you are able to apply Pennant Magnum before you start seeing nutsedge in spring, then you will see better results than if you wait to make a first application after you are already seeing the new plants come up. Please refer to the product label for complete application instructions.

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1 of 2 people found this answer helpful.
Asked by Bob from Savannah, Ga

03/12/2021

Q

Can Pennant Magnum Herbicide be applied when temperatures are in the 90's?

A

It is recommended to apply Pennant Magnum Herbicide when temperatures are between 65 and 85 degrees?

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1 of 1 people found this answer helpful.
Asked by Steven from Orlando

03/01/2021

Q

Does Pennant Magnum Herbicide kill/prevent/suppress Green Kyllinga and yellow nutsedge?

A

Unfourtunally Pennant Magnum Herbicide is labeled for pre-emergent control of yellow nutsedge but does not list green kyllinga on the product label. Unfortunately there is not a pre-emergent labeled for green kyllinga. Green Kyllinga is controlled with post emergents like Sedgehammer + Herbicid e. Pl…
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Unfourtunally Pennant Magnum Herbicide is labeled for pre-emergent control of yellow nutsedge but does not list green kyllinga on the product label. Unfortunately there is not a pre-emergent labeled for green kyllinga. Green Kyllinga is controlled with post emergents like Sedgehammer + Herbicid e. Please check the product label fo make sure your turfgrass is listed as tolerant.

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1 of 2 people found this answer helpful.
Asked by Michelle from Dallas, Tx

03/10/2023

Q

How long do you need to wait to fertilize?
How long after you apply Pennant Magnum do you need to wait to fertilize your lawn? I know many pre-emergence products you are able to treat the same day, but I wasn't sure with Pennant Magnum specifically.

A

Per the label, a fertilizer can be applied the same day or mixed with the Pennant MAGNUM. Mix Pennant MAGNUM with water or fluid fertilizer and apply as a spray. Fill the spray tank 1/2-3/4 full with water or fluid fertilizer, start agitation, add the proper amount of Pennant MAGNUM, then add the …
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Per the label, a fertilizer can be applied the same day or mixed with the Pennant MAGNUM. Mix Pennant MAGNUM with water or fluid fertilizer and apply as a spray. Fill the spray tank 1/2-3/4 full with water or fluid fertilizer, start agitation, add the proper amount of Pennant MAGNUM, then add the rest of the water or fluid fertilizer. Agitate continuously during mixing and application to maintain a uniform spray.

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Asked by Michelle from Dallas, Texas

03/08/2023

Q

Can Pennant Magnum be used on dormant zoysia grass?
I'm in Texas and it's early spring right now. My grass is absolutely dormant and I'm already seeing lots of nutsedge popping up. I wanted to verify that this product can be used on dormant grass without damaging it.

A

Pennant Magnum Herbicide is safe to use on Bahiagrass, Bermudagrass, Centipedegrass, St. Augustinegrass, and Zoysiagrass (including commercial St. Augustinegrass Sod Production) as directed on the product label. If you have nutsedge already emerging, it would not affect it. Nutsedge grows in gr…
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Pennant Magnum Herbicide is safe to use on Bahiagrass, Bermudagrass, Centipedegrass, St. Augustinegrass, and Zoysiagrass (including commercial St. Augustinegrass Sod Production) as directed on the product label. If you have nutsedge already emerging, it would not affect it. Nutsedge grows in grass and is most prominent in the summer, so it would not really be seen this soon, so we would make sure it is correctly identified. If you do in fact have nutsedge, something like Sulfentrazone would be needed for post-emergent control.

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Asked by Ricky from Suffolk

01/15/2023

Q

Is pennant magnum pet friendly

A

Pennant Magnum Herbicide is pet friendly when applied per the product label. Keep kids and pets out of the treated area until the application has completely dried, then it is safe to resume normal activity.

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Asked by Dustan from Ohio

03/08/2022

Q

Can you apply Pennant Magnum Herbicide after bud break in the spring?

A

For most of the country Pennant Magnum would be applied in the spring and/or fall and sometimes summer, not based on when the lawn greens up. Pre-emergents prevent weeds from germinating and growing and so if you already see weeds in your yard then it is too late to apply a pre emergent and a post…
Read Full Answer »
For most of the country Pennant Magnum would be applied in the spring and/or fall and sometimes summer, not based on when the lawn greens up. Pre-emergents prevent weeds from germinating and growing and so if you already see weeds in your yard then it is too late to apply a pre emergent and a post emergent would be recommended. Please view our Cool and Warm Season Lawn Care Calendar for general timing recommendations or we also recommend contacting your local cooperative extension office for the most accurate timing recommendations in your area.

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Asked by Michael from Jacksonville

12/14/2020

Q

Sedge control using Pennant Magnum Herbicide
How well will this pre emergent control green kyllinga if at all? Got overrun this summer/ fall, and although Dismiss worked post emergent, I'm looking for more control next year.

A

Pennant Magnum is not labeled to control green kyllinga. However, the label of Bonide Sedge Ender Concentrate states that it controls green kyllinga as a pre-emergent.

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Asked by Seth from Tyler, Tx

07/25/2020

Q

Is Pennant Magnum safe for use on St Augustine or will it cause yellowing?

A

Pennant Magnum is labeled for use on St. Augustinegrass. Please refer to the label for complete application instructions.

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Asked by Paul from Leander, Tx

02/15/2020

Q

How long does Pennant Magnum prevent weeds?

A

You can apply Pennant Magnum once or twice annually before weeds emerge. The max rate for Pennant Magnum depends on what type of area you are using it in. Per the product label: For commercial sod production, do not apply more than 4.2 pt/A per year to the same area used for sod production.…
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You can apply Pennant Magnum once or twice annually before weeds emerge. The max rate for Pennant Magnum depends on what type of area you are using it in. Per the product label: For commercial sod production, do not apply more than 4.2 pt/A per year to the same area used for sod production. For other turf uses, do not apply more than 2.6 pt/A per year.

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0 of 4 people found this answer helpful.
Asked by Bruce from Jacksonville, Fl

02/16/2019

Q

Is there a maximum rate/amount of Pennant Magnum that should be applied per growing season?

A

The max rate for Pennant Magnum depends on what type of area you are using it in. Per the product label: For commercial sod production, do not apply more than 4.2 pt/A per year to the same area used for sod production. For other turf uses, do not apply more than 2.6 pt/A per year.

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0 of 2 people found this answer helpful.