Weed Control
How to Kill Bermuda Grass in a Fescue Lawn: Mow It Out First
Virginia Tech: tall fescue can completely kill bermudagrass at a 4-inch mowing height with no herbicide. Mow lower and no product will save you.
Selective Grass Herbicide (fluazifop concentrate, professional)
Syngenta Fusilade II Turf & Ornamental Herbicide, 4 oz Review
★★★★☆ 4.2/5
our editor rating how we score4.4/5 from 124 shoppers at Amazon — their number, not ours.
$30–$40
Typical price · 4 oz of 24.5% concentrate — professional strength in a small pack
Affiliate links — see our disclosure. Commissions never influence verdicts.
The same active as Ornamec 170 at fourteen times the concentration, in a pack small enough for a homeowner to buy and easy enough to over-apply.
Our Verdict
Reviewed mainly so the comparison is visible. Fusilade II is fluazifop-P-butyl at 24.5%; Ornamec 170 is the same active at 1.70%. That is roughly a fourteen-fold difference, and it is the whole story of this purchase. On acreage or a professional route the concentration is the point — you are buying active ingredient rather than water, and UGA Extension names fluazifop as one of two actives usable alone in tall fescue and zoysia lawns. On a suburban lawn measured with a kitchen spoon, it is a way to injure turf you meant to keep. The four-ounce pack makes this worse rather than better: it is cheap enough to buy casually and concentrated enough that the difference between a correct dose and a damaging one is a fraction of a teaspoon. If you want fluazifop for bermudagrass in fescue and you are treating a lawn, buy the 1.7% product and follow its section. If you are treating acres, or already calibrate, this is the economical form.
✅ Pros
- 24.5% fluazifop — by far the lowest cost per treated area of the fluazifop products here
- UGA Extension names fluazifop among the actives usable alone in tall fescue and zoysiagrass lawns
- Turf and ornamental label rather than an agricultural one
- Small pack means you are not committed to a gallon of professional concentrate
⚠️ Cons
- 14× the concentration of the homeowner product for the same job — measuring error is the main risk here
- A 4 oz pack invites casual purchase of a professional-strength product
- Fluazifop kills grass: any overspray onto lawn you are keeping is damage, not discoloration
- We have not read this specific pack's label; the registration is confirmed but the printed booklet is not
Product type
Selective Grass Herbicide (fluazifop concentrate, professional)
Active ingredient
Fluazifop-P-butyl 24.5%
Price range
$30–$40
Coverage
4 oz of 24.5% concentrate — professional strength in a small pack
Best for
Anyone already calibrating a sprayer and treating enough area to justify a professional concentration
our editor rating
4.2 out of 5
Where our facts come from
Registration confirmed, label text not read
EPA Reg. No. 100-1070
The registration exists and we confirmed it, but no label document was available to read. Treat the concentration and general use pattern as sound and take rates from the container itself.
What we found when we read it
Checked 2026-08-03. Fluazifop-P-butyl 24.5% is consistent across the distributor label copies found, and Fusilade II is a Syngenta (company 100) turf and ornamental product; the registration number recorded here is the widely published one for Fusilade II T/O and we have NOT confirmed it against an EPA PPLS record or read the printed 4 oz booklet. Treated as registration-only for that reason: the concentration and the general use pattern are safe to state, and no rate on this page should be attributed to this product's label. Priority to close, because a 24.5% concentrate is the one where a rate error costs the most.
Where this page and the container disagree, the container wins — the label is the legal authority on rates and restrictions. How to read one yourself.
Where This Product Matters
Matched against each state's actual disease, weed and pest pressure.
Alabama
Alabama hub →Crabgrass
Application window: April–May and September, and check every label against centipede before it leaves the shelf
Arizona
Arizona hub →CrabgrassBermudagrass mites
Application window: March–May and during monsoon flushes; Celsius-type products handle 100°F+ windows
Arkansas
Arkansas hub →Crabgrass
Application window: Bounded by the label's temperature ceiling rather than the calendar — spring treatments finish before the June heat arrives, and nothing selective goes down again until September cools off
California
California hub →CrabgrassCommon bermudagrass invading fescue lawns
Application window: March–May while weeds are young; avoid spraying drought-stressed turf in summer
Colorado
Colorado hub →Crabgrass
Application window: May–June and September; high-altitude sun makes stressed turf easy to injure, so spot-treat rather than blanket-spray
Connecticut
Connecticut hub →Crabgrass
Application window: Broadleaf sprays in May–June and again in September, when the weeds are moving sugars to the roots; skip July and August, when a stressed cool-season lawn takes the injury and the weed does not
Delaware
Delaware hub →Crabgrass
Application window: April to late May, then September into October. Skip July and August entirely: this is the transition zone, and a stressed tall fescue lawn takes the injury the weed shrugs off
Florida
Florida hub →Crabgrass
Application window: March–May and October–November; avoid applications above 85°F
Georgia
Georgia hub →Crabgrass
Application window: April to early June and September–October; avoid mid-summer sprays on stressed turf
Hawaii
Hawaii hub →Crabgrass
Application window: Year-round where the turf is actively growing, which is most of the time; the constraint is heat and drought stress on the leeward side rather than a dormant season
Idaho
Idaho hub →Crabgrass in the warmer southern valleys
Application window: Late April into June, then September into October; skip the July and early August heat, which is also when UI's own fertilizer schedule goes quiet
Illinois
Illinois hub →Crabgrass
Application window: May–June and September; fall beats creeping charlie best
Indiana
Indiana hub →Crabgrass
Application window: October is the most effective month for broadleaf weeds; never apply above 80°F or to drought-stressed turf
Iowa
Iowa hub →Crabgrass
Application window: October, and October is most of it — but check the wind and the date against what is happening in the fields, because early-summer growth-regulator drift is a real seasonal risk here and your own spray carries the same way
Kansas
Kansas hub →Spring dead spot on bermudagrassCrabgrassBuffalograss and bermudagrass encroaching as weeds in a fescue lawn, which is the transition zone working against you
Application window: April into May and again in September–October; avoid July and August, when a tall fescue lawn here is already at its limit
Kentucky
Kentucky hub →Crabgrass
Application window: April–May and September–October; autumn is the knockout window for the wild garlic that defines a Kentucky winter lawn
Maine
Maine hub →Crabgrass (southern and coastal Maine more than the interior)
Application window: June, then a narrow late-August to mid-September window. Maine's usable autumn is the shortest in New England
Maryland
Maryland hub →Crabgrass
Application window: April–May and September–October; autumn is the knockout window for the ground ivy and violet the Piedmont is full of
Massachusetts
Massachusetts hub →Crabgrass
Application window: A narrow autumn is the real window here: late September into October, after the summer heat and before New England's early frost closes the season
Michigan
Michigan hub →Crabgrass
Application window: May–June and September; autumn is the stronger window for perennial broadleaf weeds
Minnesota
Minnesota hub →Crabgrass
Application window: Late May–June and September; autumn is the stronger window for perennial broadleaf weeds
Mississippi
Mississippi hub →Crabgrass
Application window: April–May and September, avoiding the midsummer heat restrictions on most labels
Missouri
Missouri hub →Crabgrass
Application window: April–May and September–October; skip summer sprays on drought-stressed fescue
Montana
Montana hub →Crabgrass and foxtail in the warmer valleys and in thin ground
Application window: June, then late August into September. In a sub-100-day valley there is no third chance
Nebraska
Nebraska hub →Crabgrass
Application window: Late spring and again from late August through September, when perennial broadleaf weeds are moving reserves to the root
Nevada
Nevada hub →CrabgrassBermudagrass mites (southern lawns)
Application window: March–April and October in the south; May and September in the north
New Hampshire
New Hampshire hub →Crabgrass (heaviest in the south, thinning northward)
Application window: Late May into June, then late August through September. The autumn window closes earlier here than anywhere else in southern New England
New Jersey
New Jersey hub →Crabgrass
Application window: May and September–October; autumn is the knockout window for perennial broadleaf weeds
New Mexico
New Mexico hub →Spring dead spot on bermudagrass, appearing as the lawn greens upCrabgrass in irrigated turfBermudagrass encroaching into a northern bluegrass lawn, which is the transition zone working against youBermudagrass mites in the south
Application window: Spring and early autumn; in the south skip the June heat entirely, and in the north the usable autumn window closes by early October
New York
New York hub →Crabgrass
Application window: May and September–October; autumn is the knockout window for perennial broadleaf weeds
North Carolina
North Carolina hub →Crabgrass
Application window: April–May and September–October; avoid spraying heat-stressed fescue in July–August
North Dakota
North Dakota hub →Crabgrass, real but a smaller problem than further south
Application window: Early to mid-June, then late August into early September. There is no third opportunity
Ohio
Ohio hub →Crabgrass
Application window: May–June and September; fall applications hit dandelion taproots hardest
Oklahoma
Oklahoma hub →CrabgrassSandbur (the western sandy-soil weed that standard crabgrass preventers do not list)Bermudagrass mites
Application window: Judged by wind before season: sustained wind is Oklahoma's normal condition, so the usable spray days are calm mornings in April, May and September rather than whole months
Oregon
Oregon hub →Crabgrass (east side and hot summers only)
Application window: March–May and September–October; the long mild shoulder seasons give more usable spray days than most states get
Pennsylvania
Pennsylvania hub →Crabgrass
Application window: May and September — fall is the knockout window for perennial broadleaf weeds
Rhode Island
Rhode Island hub →Crabgrass
Application window: Broadleaf work in May–June and again in September; the September pass is the one that holds, because the weed is moving reserves down
South Carolina
South Carolina hub →Crabgrass
Application window: April–May and September–October, and never above 90°F — centipedegrass is sensitive to 2,4-D both at spring green-up and in summer heat
South Dakota
South Dakota hub →Crabgrass and foxtail in thin or disturbed ground
Application window: Early to mid-June, then late August into September, which is the pass that actually holds on perennial broadleaf weeds
Tennessee
Tennessee hub →Dallisgrass (a perennial the quinclorac that clears crabgrass will not touch)Crabgrass
Application window: April–May and September–October; skip sprays on drought-stressed summer fescue
Texas
Texas hub →CrabgrassBermudagrass mites
Application window: April–early June and September–October; avoid herbicides above 90°F
Utah
Utah hub →Crabgrass
Application window: May and September, avoiding the intense midsummer heat on the label
Vermont
Vermont hub →Crabgrass (a valley problem more than a hill-town one)
Application window: Late May through June, then a short late-August to mid-September window. Vermont's autumn window is the narrowest in New England
Virginia
Virginia hub →Crabgrass
Application window: April–May and September–October; skip sprays on heat-stressed fescue in July and August
West Virginia
West Virginia hub →Crabgrass
Application window: April into May and again in September–October. Skip July and August: this is transition-zone country and a heat-stressed tall fescue lawn absorbs the injury the weed does not
Wisconsin
Wisconsin hub →Crabgrass
Application window: Early to mid-fall is the favourable window for dandelion and other perennial broadleaf weeds
Common questions
Common Questions
How much does Syngenta Fusilade II Turf & Ornamental Herbicide, 4 oz cost?
Syngenta Fusilade II Turf & Ornamental Herbicide, 4 oz typically runs $30–$40, covering 4 oz of 24.5% concentrate — professional strength in a small pack.
What does Syngenta Fusilade II Turf & Ornamental Herbicide, 4 oz treat?
Syngenta Fusilade II Turf & Ornamental Herbicide, 4 oz targets bermudagrass, crabgrass, grassy weeds in ornamentals.
What is the active ingredient in Syngenta Fusilade II Turf & Ornamental Herbicide, 4 oz?
Fluazifop-P-butyl 24.5%, registered under EPA Reg. No. 100-1070.
What is the biggest downside of Syngenta Fusilade II Turf & Ornamental Herbicide, 4 oz?
14× the concentration of the homeowner product for the same job — measuring error is the main risk here
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