Horsenettle
Solanum carolinense
Horsenettle (Solanum carolinense) is a perennial broadleaf weed characterized by stems and leaf midribs armed with sharp yellow prickles; potato-like white-violet flowers; yellow cherry-like berries.. It anchors via a deep fleshy taproot root system and is selectively controlled using Triclopyr or 2,4-D Amine applied during during flowering in mid-summer..
Triclopyr or 2,4-D Amine
Stems and leaf midribs armed with sharp yellow prickles; potato-like white-violet flowers; yellow cherry-like berries.
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 Horsenettle
Accurately identifying Solanum carolinense is essential because spraying non-selective chemicals like glyphosate risks killing desirable lawn grass. Look for these botanical hallmarks:
- Foliar Morphology: Stems and leaf midribs armed with sharp yellow prickles; potato-like white-violet flowers; yellow cherry-like berries..
- Root Architecture: Anchored by a deep fleshy taproot, making manual pulling ineffective unless the entire root crown is extracted.
- Growth Period: Active during perennial cycles, flourishing when lawn turf is stressed or cut too short.
Eradication Protocol & Selective Herbicide Selection
To eradicate Horsenettle while preserving your lawn turfgrass, apply Triclopyr or 2,4-D Amine during During flowering in mid-summer.. 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 Horsenettle
01 How do I kill Horsenettle without harming my lawn?
Use a selective herbicide labeled for your specific turfgrass species containing Triclopyr or 2,4-D Amine. Spray when Horsenettle is actively growing during during flowering in mid-summer.. Always check your host grass in our weed triage tool before application.
02 Why does pulling Horsenettle by hand often fail?
Horsenettle 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 Horsenettle?
Horsenettle is classified botanically as a Broadleaf weed with a Perennial life cycle.
04 When is the best time of year to treat Horsenettle?
The optimal eradication window is During flowering in mid-summer.. Applying when temperatures are between 60°F and 85°F ensures maximum chemical absorption and prevents foliar heat stress to your desirable lawn.