Spotted Spurge
Euphorbia maculata
Spotted Spurge (Euphorbia maculata) is a summer annual broadleaf weed characterized by low-growing red-stemmed mats radiating from central taproot; reddish-purple blotch on leaf center; toxic milky sap.. It anchors via a deep fleshy taproot root system and is selectively controlled using Isoxaben / Prodiamine (Pre-emergent); 2,4-D + Dicamba + Sulfentrazone (Post-emergent) applied during pre-emergent application in late spring as soil temperatures reach 60°f..
Isoxaben / Prodiamine (Pre-emergent); 2,4-D + Dicamba + Sulfentrazone (Post-emergent)
Low-growing red-stemmed mats radiating from central taproot; reddish-purple blotch on leaf center; toxic milky sap.
Always read and follow the manufacturer's EPA-approved pesticide product label. The label is the law under federal FIFRA (Federal Insecticide, Fungicide, and Rodenticide Act) regulations. Application rates, personal protective equipment (PPE), target weed maturity stages, temperature restrictions, and grazing or re-entry intervals specified on the EPA container label supersede all online recommendations. Local state regulations may restrict certain active ingredients.
University-Verified Herbicide Formulations
Professional active formulations cross-referenced against university weed science trials.
Tenacity Herbicide (Mesotrione 8 oz)
Active: 40% Mesotrione Selective Systemic
Gold standard selective pre- and post-emergent targeting crabgrass, ground ivy, yellow nutsedge, and clover during overseeding.
SedgeHammer+ Turf Herbicide (Halosulfuron 0.5 oz)
Active: 5% Halosulfuron-methyl with Surfactant
Pre-mixed with surfactant for 1-gallon sprayers. Translocates into underground nutlets without injuring cool or warm season lawns.
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Botanical Identification Key for Spotted Spurge
Accurately identifying Euphorbia maculata is essential because spraying non-selective chemicals like glyphosate risks killing desirable lawn grass. Look for these botanical hallmarks:
- Foliar Morphology: Low-growing red-stemmed mats radiating from central taproot; reddish-purple blotch on leaf center; toxic milky sap..
- Root Architecture: Anchored by a deep fleshy taproot, making manual pulling ineffective unless the entire root crown is extracted.
- Growth Period: Active during summer annual cycles, flourishing when lawn turf is stressed or cut too short.
Eradication Protocol & Selective Herbicide Selection
To eradicate Spotted Spurge while preserving your lawn turfgrass, apply Isoxaben / Prodiamine (Pre-emergent); 2,4-D + Dicamba + Sulfentrazone (Post-emergent) during Pre-emergent application in late spring as soil temperatures reach 60°F.. Ensure that the active ingredients match your host turfgrass tolerances:
- Temperature Safety Band: Apply when ambient air temperatures range between 65°F and 85°F. Never apply volatile ester herbicides in temperatures exceeding 85°F to prevent herbicide vapor drift and leaf burn.
- Adjuvant / Surfactant: For waxy or hairy weed foliage, mix with a methylated seed oil (MSO) or non-ionic surfactant according to EPA label instructions to enhance chemical cuticle penetration.
- Mowing Holdback: Do not mow the lawn 2 days prior to spraying or 2 days after application to maximize foliar surface area for chemical absorption.
Frequently Asked Questions About Spotted Spurge
01 How do I kill Spotted Spurge without harming my lawn?
Use a selective herbicide labeled for your specific turfgrass species containing Isoxaben / Prodiamine (Pre-emergent); 2,4-D + Dicamba + Sulfentrazone (Post-emergent). Spray when Spotted Spurge is actively growing during pre-emergent application in late spring as soil temperatures reach 60°f.. Always check your host grass in our weed triage tool before application.
02 Why does pulling Spotted Spurge by hand often fail?
Spotted Spurge anchors via a deep fleshy taproot. Hand-pulling often breaks the crown or leaves underground root fragments, rhizomes, or nutlets behind, which triggers rapid regrowth. Systemic selective herbicides translocate down through the vascular tissue to destroy the entire root structure.
03 What class of weed is Spotted Spurge?
Spotted Spurge is classified botanically as a Broadleaf weed with a Summer Annual life cycle.
04 When is the best time of year to treat Spotted Spurge?
The optimal eradication window is Pre-emergent application in late spring as soil temperatures reach 60°F.. Applying when temperatures are between 60°F and 85°F ensures maximum chemical absorption and prevents foliar heat stress to your desirable lawn.