Overview of Metaldehyde

Metaldehyde is a widely used molluscicide in Vietnamese agriculture, particularly effective against the golden apple snail (Pomacea canaliculata) – a serious pest on rice and other aquatic crops.

Typically formulated at concentrations of 6% – 15% in GR (granules), AB (baits), or RB (ready-to-use baits), Metaldehyde is favored for its cost-effectiveness and strong performance in the field.

Mode of Action

Metaldehyde works by overstimulating mucus secretion in snails, leading to:

• Severe dehydration
• Neuromuscular dysfunction
• Feeding inhibition
• Death within 2–3 days after exposure

The active ingredient acts through both contact and stomach poison, and its bait formulations are particularly attractive to snails thanks to added feeding stimulants.

Formulation Challenges of Metaldehyde

Despite its effectiveness, Metaldehyde formulations face several technical challenges:

• Active ingredient stability: Metaldehyde is heat-sensitive, prone to sublimation and decomposition above 80°C.
• Bait hardness: The bait must be strong enough to withstand transportation without breaking, yet soft enough for snails to feed on. Overly hard pellets reduce attractiveness, while overly soft ones disintegrate quickly in humid environments.
• Attractant balance: The formula must balance feeding stimulants with product durability.
• Water resistance: Baits must maintain integrity for at least 7–10 days in wet paddy fields without disintegrating.
• Content degradation: Field observations and expert feedback indicate Metaldehyde content may decrease by around 20% after one year of storage – a major challenge impacting product quality and efficacy.

Conclusion

Metaldehyde remains a proven and cost-effective solution for snail management in Vietnamese agriculture. However, ensuring long-term stability—particularly in preventing content degradation—requires advanced formulation technology and the use of suitable stabilizing or protective additives.

Bonding™ A25: Advanced Binder for Metaldehyde Formulations

Bonding™ A25 is a liquid polyurethane-based polymer binder, specifically designed for use in granular (GR) and bait (AB) pesticide formulations.

Key Benefits

• Easy to use: Liquid form, dissolves easily in water compared to some powder binders that are difficult to disperse.
• Consistent quality: Provides uniform product quality compared to direct mixing with powder binders, which often leads to uneven results.
• Strong binding capacity: Effective at low dosage rates, suitable even when applied via spraying.
• Stable performance: Compatible with colors and attractants, ensuring reliable product quality.
• Easy storage: Does not absorb moisture like powder binders, making it more stable during storage.

Reference Formulation

• Metaldehyde 12% GR

Product Specifications

• Appearance: Liquid
• Solid content: ≥ 45%
• pH (direct): 7 – 9
• Packaging: 200 kg/drum

Its properties make it an ideal solution for Metaldehyde products, helping manufacturers improve pellet hardness, durability, and long-term stability, ensuring consistent field performance.

Ericol™ Meta – A Breakthrough for SC Formulations

Moving beyond the traditional GR and AB forms, Amigos introduces Ericol™ Meta – an innovative solution for developing Metaldehyde SC (Suspension Concentrate) formulations, fully compatible with the active ingredient produced using conventional manufacturing technology.

With Ericol™ Meta, manufacturers gain access to a broader range of additive options, enabling greater flexibility and differentiation in product development.