
Weed Control
Seeding After Pre-Emergent: The Conflict Nobody Warns You About
A crabgrass barrier cannot tell your grass seed from a weed seed. Purdue's per-product delays, the three actives labelled for seeding, and the honest workaround.

Selective Pre- and Post-Emergent Herbicide (concentrate)
★★★★★ 4.5/5
nuestra calificación editorial cómo puntuamos4.3/5 según 1,479 compradores en Amazon — su cifra, no la nuestra.
$26–$34
Precio habitual · 8 oz concentrate; rate per label by target and turf species
Enlaces de afiliado — consulte nuestra divulgación. Las comisiones nunca influyen en los veredictos.
La mesotriona es uno de los solo tres activos etiquetados para usarse en el momento de la siembra, y esta es su versión concentrada a precio doméstico en lugar del producto profesional.
Esto cierra un hueco real. Rutgers nombra la mesotriona, el siduron y el topramezone como los únicos herbicidas preemergentes etiquetados para usarse en el momento de la siembra — todo lo demás del estante de preventivos de crabgrass detendrá su semilla de césped junto con la de la maleza. La mesotriona era antes una elección entre un fertilizante de arranque a una dosis baja fija o el Tenacity profesional; este es el mismo activo como concentrado a precio doméstico, lo que significa que puede aplicarlo a la dosis de etiqueta en una siembra de primavera. Dos cosas que esperar. Rutgers señala que tras la aplicación las plántulas de maleza y a veces el propio césped se ven blanqueados durante 7 a 21 días — el activo bloquea la producción de pigmento, así que el césped pálido es el producto funcionando y no fallando, y es posible una segunda aplicación de 4 a 6 semanas después. Y lea la lista de céspedes antes de comprar: la tolerancia a la mesotriona está en las especies de estación fría, y no es un producto de estación cálida. Rutgers también es franco: la mesotriona no es tan eficaz como la pendimetalina, el ditiopir o la prodiamina en un césped establecido — está cambiando algo de control de crabgrass por la posibilidad de sembrar siquiera.
Tipo de producto
Selective Pre- and Post-Emergent Herbicide (concentrate)
Ingrediente activo
Mesotrione 40.0% (Tenacity equivalent)
Rango de precio
$26–$34
Cobertura
8 oz concentrate; rate per label by target and turf species
Ideal para
Siembra o renovación de primavera en un césped de estación fría, donde cualquier otro preemergente detendría también la semilla de césped
nuestra calificación editorial
4.5 out of 5
Etiqueta leída en el PDF del titular del registro
EPA Reg. No. 91234-75
Leímos la etiqueta impresa publicada por la empresa titular del registro. La EPA no aloja un PDF de esta, así que es el mejor texto disponible.
Specimen label read 2026-08-02 on the registrant's own site. EPA Reg. 91234-75, mesotrione 40.0%. CORRECTION: retail copy and one sell sheet describe this product as 60% mesotrione / 4 lb per gallon; the label's active ingredient statement reads 40.0%, and that is what we record. Rate read off the label: 4 to 8 fl. oz. per acre (0.125 to 0.25 lb AI) in at least 30 gallons of water. The label also cross-references prodiamine (EPA Reg. 100-834) as a tank-mix partner for extended crabgrass and foxtail control. PROVENANCE CAVEAT recorded 2026-08-03: the PDF read is headed 'This information is for promotional purposes only… Always refer to the actual package for complete label verbiage', so it is a specimen rather than the full accepted label. It also states 'Contains 4 lbs. Mesotrione per gallon', which reconciles with the 40.0% figure. Checked specifically for a bermudagrass-suppression-in-fescue use because Virginia Tech's programme uses mesotrione for that: this specimen does NOT carry it. Its only bermudagrass section is 'Dormant Bermudagrass Application Only', for winter weeds in dormant bermuda — the opposite use, with bermuda as the crop. So this product is not carded for bermudagrass control in cool-season turf.
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.
Contrastado con la presión real de enfermedades, malezas y plagas de cada estado.
Ventana de aplicación: April–May and September, and check every label against centipede before it leaves the shelf
Ventana de aplicación: June through July, inside the same short window everything else happens in. There is no autumn second chance
Ventana de aplicación: March–May and during monsoon flushes; Celsius-type products handle 100°F+ windows
Ventana de aplicación: 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
Ventana de aplicación: March–May while weeds are young; avoid spraying drought-stressed turf in summer
Ventana de aplicación: May–June and September; high-altitude sun makes stressed turf easy to injure, so spot-treat rather than blanket-spray
Ventana de aplicación: 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
Ventana de aplicación: 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
Ventana de aplicación: March–May and October–November; avoid applications above 85°F
Ventana de aplicación: April to early June and September–October; avoid mid-summer sprays on stressed turf
Ventana de aplicación: 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
Ventana de aplicación: 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
Ventana de aplicación: May–June and September; fall beats creeping charlie best
Ventana de aplicación: October is the most effective month for broadleaf weeds; never apply above 80°F or to drought-stressed turf
Ventana de aplicación: 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
Ventana de aplicación: April into May and again in September–October; avoid July and August, when a tall fescue lawn here is already at its limit
Ventana de aplicación: April–May and September–October; autumn is the knockout window for the wild garlic that defines a Kentucky winter lawn
Ventana de aplicación: March–May and October–November; avoid applications above 85°F and never on drought-stressed St. Augustine
Ventana de aplicación: June, then a narrow late-August to mid-September window. Maine's usable autumn is the shortest in New England
Ventana de aplicación: April–May and September–October; autumn is the knockout window for the ground ivy and violet the Piedmont is full of
Ventana de aplicación: 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
Ventana de aplicación: May–June and September; autumn is the stronger window for perennial broadleaf weeds
Ventana de aplicación: Late May–June and September; autumn is the stronger window for perennial broadleaf weeds
Ventana de aplicación: April–May and September, avoiding the midsummer heat restrictions on most labels
Ventana de aplicación: April–May and September–October; skip summer sprays on drought-stressed fescue
Ventana de aplicación: June, then late August into September. In a sub-100-day valley there is no third chance
Ventana de aplicación: Late spring and again from late August through September, when perennial broadleaf weeds are moving reserves to the root
Ventana de aplicación: March–April and October in the south; May and September in the north
Ventana de aplicación: Late May into June, then late August through September. The autumn window closes earlier here than anywhere else in southern New England
Ventana de aplicación: May and September–October; autumn is the knockout window for perennial broadleaf weeds
Ventana de aplicación: Spring and early autumn; in the south skip the June heat entirely, and in the north the usable autumn window closes by early October
Ventana de aplicación: May and September–October; autumn is the knockout window for perennial broadleaf weeds
Ventana de aplicación: April–May and September–October; avoid spraying heat-stressed fescue in July–August
Ventana de aplicación: Early to mid-June, then late August into early September. There is no third opportunity
Ventana de aplicación: May–June and September; fall applications hit dandelion taproots hardest
Ventana de aplicación: 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
Ventana de aplicación: March–May and September–October; the long mild shoulder seasons give more usable spray days than most states get
Ventana de aplicación: May and September — fall is the knockout window for perennial broadleaf weeds
Ventana de aplicación: Broadleaf work in May–June and again in September; the September pass is the one that holds, because the weed is moving reserves down
Ventana de aplicación: 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
Ventana de aplicación: Early to mid-June, then late August into September, which is the pass that actually holds on perennial broadleaf weeds
Ventana de aplicación: April–May and September–October; skip sprays on drought-stressed summer fescue
Ventana de aplicación: April–early June and September–October; avoid herbicides above 90°F
Ventana de aplicación: May and September, avoiding the intense midsummer heat on the label
Ventana de aplicación: Late May through June, then a short late-August to mid-September window. Vermont's autumn window is the narrowest in New England
Ventana de aplicación: April–May and September–October; skip sprays on heat-stressed fescue in July and August
Ventana de aplicación: April–May and September–October; WSU caps applications at 80°F, stricter than the 85–90°F ceilings used elsewhere
Ventana de aplicación: 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
Ventana de aplicación: Early to mid-fall is the favourable window for dandelion and other perennial broadleaf weeds
Ventana de aplicación: June, then late August into September. UW's own framing is useful: a slow-release application covers a 90 to 100 day growing season, which is roughly the entire Wyoming season
Common questions
Atticus Torocity Mesotrione Herbicide, 8 oz suele costar $26–$34 y cubre 8 oz concentrate; rate per label by target and turf species.
Atticus Torocity Mesotrione Herbicide, 8 oz actúa sobre crabgrass, clover, nutsedge, dandelion, foxtail.
Mesotrione 40.0% (Tenacity equivalent), registrado con el n.º de registro EPA 91234-75.
Solo césped de estación fría — consulte la lista de especies de la etiqueta, no es un producto de estación cálida
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Weed Control
A crabgrass barrier cannot tell your grass seed from a weed seed. Purdue's per-product delays, the three actives labelled for seeding, and the honest workaround.

Weed Control
55°F is when you spray, not when crabgrass germinates. Purdue puts germination at 57–64°F and the flood at 73°F. Confusing the two is why people are late.

Weed Control
Clover spreads where nitrogen is short — it makes its own. Feed the turf and it recedes. If you still want it out, four actives work and one popular one is absent.

Lawn Care Guides
When to overseed: late summer beats spring for cool-season lawns, most warm-season lawns should not be overseeded at all — and pre-emergent blocks your seed.

Weed Control
Crabgrass is a timing problem — but one pre-emergent pass is not a whole season. UF/IFAS: season-long control takes a second application 6–9 weeks later.
Boletín de Lawn Health
Ventanas de preemergentes, alertas de enfermedades y calendarios de fertilización para su región — un correo corto, justo cuando su césped lo necesita.
Gratis para siempre. Cancele cuando quiera. Solo céspedes en EE. UU. (por ahora). Los correos se envían en inglés. El complemento de esta temporada: la lista imprimible de verano .