Pennant Magnum Herbicide

3.5 out of 5 stars 2 Reviews | 13 Q&A

Pennant Magnum Herbicide
10% Off This Item! Use Code: FALL10

Have a Question? Ask Our Pros!

Call Us: 866-581-7378
Mon-Fri 9am-5pm ET
Email Our Pros
We're here to help
Live Chat
DIY Pros Available Now

You May Also Need

Advion WDG Insecticide
$9.98

Average Rating

3.5 out of 5 stars Rating: 3.5

2 Reviews | 13 Q&A

Product Overview

Pennant Magnum is a selective pre-emergent herbicide that controls weeds in nurseries, turf, and landscape plantings. Pennant Magnum controls yellow nutsedge, smooth and large crabgrass, and over 20 other ornamental and landscape weeds. It may be used on commercial and residential warm-season turf and other noncrop land, including golf courses, sports fields, recreational areas, ornamental gardens and others. Pennant Magnum comes in an easy to use liquid formulation and can be tank mixed with other professional herbicides.

  • NOTE: This has been opened and repackaged for extra security to avoid any spillage.

Features and Specs

Active Ingredient S-Metolachlor 83.7%
Target pests Annual Bluegrass, Barnyardgrass, Black Nightshade, Carpetweed, Crabgrass (large & smooth), Foxtails, Goosegrass, Pigweed, Yellow nutsedge and others
* See label for complete list
For use in Airports, Roadsides, Golf Courses, Sports Fields, Public Recreational areas, Ornamental Gardens, Cemeteries and other landscaped areas

Commercial and Residential warm-season turfgrass and ornamentals
Bahiagrass, Bermudagrass, Centipedegrass, St. Augustinegrass and Zoysiagrass (including commercial St. Augustinegrass Sod Production)
Application 14-28 ml per 1,000 sq. ft.
1.3 - 2.6 pints per acre
* See label for complete application instructions
Formulation Professional Product
Group 15 Herbicide
NOT FOR SALE TO AK
NY (Restricted To Licensed Applicators Only)
Shipping Weight 9.73 lbs
Manufacturer Syngenta (Mfg. Number: 38782)
EPA Registration 100-950

Details

Pennant MAGNUM herbicide controls many annual grasses, certain annual broadleaf weeds, and yellow nutsedge.

Pennant MAGNUM may be used on commercial and residential warm-season turfgrasses and other noncrop land, including, but not limited to the following: airports, roadsides, golf courses, sports fields, public recreational areas, ornamental gardens, cemeteries, other landscaped areas, etc. Pennant MAGNUM may also be used in and around container and field-grown ornamentals, non-bearing nursery stock, and on sod farms.

DO NOT USE IN GREENHOUSES OR OTHER ENCLOSED STRUCTURES.

5 stars   1
4 stars   0
3 stars   0
2 stars   1
1 star   0
  
  • 2 of 5 Stars

    Spend More, Get Less

    By John on 04/28/2020

    Put this product down following instructions exactly. 2 weeks later, my first nutsedge is popping up. Save your money and buy Sedgehammer Plus as a post emergent.

    Was this review helpful to you?  YesNo

    3 of 10 people found this review helpful

  • 5 of 5 Stars

    Doveweed

    By Travis on 07/29/2020

    Got overrun by doveweed last year, but Magnum took care of about 90% this year with Celsius taking care of what did pop up. Can't wait to see how well it works in year 2.

    Was this review helpful to you?  YesNo

    3 of 3 people found this review helpful

See all 2 customer reviews

Questions & Answers

Have a question about this product?
  
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 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.

Was this answer helpful to you?  YesNo

24 of 31 people found this answer helpful

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 to prevent the active ingredient from settling to the bottom and getting clumpy and dried out.

Was this answer helpful to you?  YesNo

12 of 12 people found this answer helpful

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 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. 

Was this answer helpful to you?  YesNo

5 of 7 people found this answer helpful

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 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.

Was this answer helpful to you?  YesNo

4 of 11 people found this answer helpful

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.

Was this answer helpful to you?  YesNo

3 of 3 people found this answer helpful

See all 13 customer questions

Pennant Magnum Herbicide 3.5 out of 5 stars Rating: 3.5 (2 Reviews / 13 Q&A)

$224.50 + Free Shipping*