Pennant Magnum Herbicide | GreenCast | Syngenta

Product Overview

Pennant Magnum Herbicide - Pre-Emergent Weed Control for Warm-Season Turf and Ornamentals

Pennant Magnum® herbicide, containing the active ingredient s-metolachlor, prevents yellow nutsedge, smooth and large crabgrass, and over 20 more turf, ornamental and landscape weeds from germinating on the golf course or in the landscape and is safe to ornamental plants.

Key Features

  • Allows the functional portion of metolachlor, the active ingredient, to be produced more efficiently which leads to superior results at a 33% lower use rate compared to generics
  • Only herbicide that can be sprayed over-the-top of ornamental plants for nutsedge control
  • Can be used in a wide range of warm-season turfgrasses, including bermudagrass, zoysiagrass, Bahiagrass, centipedegrass, and Florida’s St. Augustinegrass
  • Formulation mixes easily with water or liquid fertilizer.  It can be sprayed onto dry bulk granular fertilizers to be spread for treatment.

Key Benefits

  • Superior weed control on warm-season turf and landscape ornamentals with 33% less product
  • Wide margin of plant safety makes it a valuable option in nurseries and landscape plantings
  • It can be used alone or tank-mixed with Barricade® herbicide to enhance effectiveness and spectrum

Download Supporting Pennant Magnum Documents

201623201671320355_goosegrass-info-sheet.jpg PDF
Goosegrass Information Sheet(PDF)

Control goosegrass with Tenacity, Princep and Pennant Magnum herbicides.




Manage difficult goosegrass with weed resistance tactics

Especially in southern areas, goosegrass (Eleusine indica) is one of the most difficult-to-control weeds in golf course turf.  Read more »


Know Your Modes of Action

It is essential for superintendents to have a working knowledge of modes of action for fungicides, insecticides and herbicides to aid in the tank-mixing process. These codes, represented as Fungicide Resistance Action Committee (FRAC) codes, Insecticide Resistance Action Committee (IRAC) codes and Herbicide Resistance Action Committee (HRAC) codes, are typically listed on product labels.  Read more »


Tenacity + Princep + Pennant Magnum: A Triple Threat for Goosegrass in Florida

Goosegrass is one of the toughest weeds in golf course turf. It is a prolific seed producer, germinates under a wide range of soil temperatures, matures quickly and thrives in compacted soils where the desired turf cannot compete. It would make an excellent playing surface, if it only had a better cold tolerance!  Read more »