Glyphosate Defoamer: Foam Control for Glyphosate SL Formulations
Glyphosate, a cornerstone herbicide, relies on surfactant adjuvants to enhance wetting, spreading, and leaf penetration for effective weed control. But these surfactants cause heavy foam during the production of glyphosate SL (soluble liquid) formulations — and especially during tank-mixing and spray application. This article explains why an effective glyphosate defoamer is essential, with lab-tested results from INVINO. For the wider weed-control range, see our herbicide defoamer page.
Why Glyphosate Formulations Need Defoamers
The surfactants needed for efficacy inevitably generate large amounts of foam during production and use, which is hard to control and hurts production efficiency. Adding a suitable agricultural defoamer such as INVINO-2200 is the simplest way to ensure a stable glyphosate SL formulation and application.
Glyphosate salts (sodium, ammonium, trimethylsulfonium) are water-soluble. To work, glyphosate must be absorbed into the plant — so adjuvants are added to reduce interfacial tension between droplets and the waxy leaf surface, helping droplets spread, penetrate the wax layer, and move into the plant. Common glyphosate adjuvants include tallow amine ethoxylate, alkyl polyglycoside, fatty alcohol ethoxylate, silicone, betaine, and others.
But introducing these surfactants causes heavy foam during production and use: air is drawn in during stirring, and the surfactant-stabilized bubbles are very persistent. This drops system density, hampers canning, and cuts production efficiency. The simplest fix is an agricultural antifoam. INVINO-2200 is used in glyphosate SL formulations as an anti-foaming agent, suitable for all water-based formulations.
Problems Caused by Foaming in Glyphosate SL
- Uneven dilution & application;
- Waste of active ingredient & formulation;
- Handling difficulties & clogging;
- Impaired sprayability & coverage;
- Potential for reduced efficacy.
Glyphosate Defoamer Test: INVINO-2200
INVINO-2200 is a high-dynamic defoamer with low silicone content. It maintains outstanding defoaming after storage, especially with ionic surfactants present.
- Glyphosate IPA salt: 45.8 wt.-%
- Tallow amine (15 EO): 8.0 wt.-%
- Water: 46.12 wt.-%
- Defoamer dosage: 0.05%
The defoaming effect of INVINO-2200 after storing the glyphosate SL formulation at 40°C for 3 days is shown below, demonstrating excellent long-lasting performance and persistence compared to references.
Recommended: INVINO-2200 — Glyphosate SL Defoamer
Specifically developed for glyphosate formulations, providing excellent long-lasting defoaming and stability directly within the concentrate — for smoother production, easier application, and reliable efficacy for end-users.
FAQ: Glyphosate Foam Control
Q: Why do glyphosate formulations need a defoamer?
A: Glyphosate SL relies on surfactant adjuvants for wetting and leaf penetration, but these surfactants generate stubborn foam in production and spray-tank mixing. INVINO-2200 controls that foam without harming efficacy.
Q: Will the defoamer affect glyphosate wetting and leaf absorption?
A: No. At low dose (~0.05%), INVINO-2200 collapses process foam without interfering with the surfactant wetting and spreading glyphosate needs.
Q: Is INVINO-2200 stable after storage in glyphosate SL?
A: Yes. Storage tests at 40°C for 3 days show it keeps strong, long-lasting defoaming, outperforming references even with ionic surfactants.
Q: What dosage is used in glyphosate SL?
A: Typically around 0.05%; confirm the optimum for your surfactant package through a trial.
Q: Is it compatible with all water-based herbicide formulations?
A: Yes. For the wider herbicide range, see our herbicide defoamer page.
